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 12struct pid; 13struct cred; 14 15#define __sockaddr_check_size(size) \ 16 BUILD_BUG_ON(((size) > sizeof(struct __kernel_sockaddr_storage))) 17 18#ifdef CONFIG_PROC_FS 19struct seq_file; 20extern void socket_seq_show(struct seq_file *seq); 21#endif 22 23typedef __kernel_sa_family_t sa_family_t; 24 25/* 26 * 1003.1g requires sa_family_t and that sa_data is char. 27 */ 28 29struct sockaddr { 30 sa_family_t sa_family; /* address family, AF_xxx */ 31 char sa_data[14]; /* 14 bytes of protocol address */ 32}; 33 34struct 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 47struct 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 struct kiocb *msg_iocb; /* ptr to iocb for async requests */ 55}; 56 57struct user_msghdr { 58 void __user *msg_name; /* ptr to socket address structure */ 59 int msg_namelen; /* size of socket address structure */ 60 struct iovec __user *msg_iov; /* scatter/gather array */ 61 __kernel_size_t msg_iovlen; /* # elements in msg_iov */ 62 void __user *msg_control; /* ancillary data */ 63 __kernel_size_t msg_controllen; /* ancillary data buffer length */ 64 unsigned int msg_flags; /* flags on received message */ 65}; 66 67/* For recvmmsg/sendmmsg */ 68struct mmsghdr { 69 struct user_msghdr msg_hdr; 70 unsigned int msg_len; 71}; 72 73/* 74 * POSIX 1003.1g - ancillary data object information 75 * Ancillary data consits of a sequence of pairs of 76 * (cmsghdr, cmsg_data[]) 77 */ 78 79struct cmsghdr { 80 __kernel_size_t cmsg_len; /* data byte count, including hdr */ 81 int cmsg_level; /* originating protocol */ 82 int cmsg_type; /* protocol-specific type */ 83}; 84 85/* 86 * Ancillary data object information MACROS 87 * Table 5-14 of POSIX 1003.1g 88 */ 89 90#define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg)) 91#define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg)) 92 93#define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) ) 94 95#define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr)))) 96#define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len)) 97#define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len)) 98 99#define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \ 100 (struct cmsghdr *)(ctl) : \ 101 (struct cmsghdr *)NULL) 102#define CMSG_FIRSTHDR(msg) __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen) 103#define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \ 104 (cmsg)->cmsg_len <= (unsigned long) \ 105 ((mhdr)->msg_controllen - \ 106 ((char *)(cmsg) - (char *)(mhdr)->msg_control))) 107#define for_each_cmsghdr(cmsg, msg) \ 108 for (cmsg = CMSG_FIRSTHDR(msg); \ 109 cmsg; \ 110 cmsg = CMSG_NXTHDR(msg, cmsg)) 111 112/* 113 * Get the next cmsg header 114 * 115 * PLEASE, do not touch this function. If you think, that it is 116 * incorrect, grep kernel sources and think about consequences 117 * before trying to improve it. 118 * 119 * Now it always returns valid, not truncated ancillary object 120 * HEADER. But caller still MUST check, that cmsg->cmsg_len is 121 * inside range, given by msg->msg_controllen before using 122 * ancillary object DATA. --ANK (980731) 123 */ 124 125static inline struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size, 126 struct cmsghdr *__cmsg) 127{ 128 struct cmsghdr * __ptr; 129 130 __ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) + CMSG_ALIGN(__cmsg->cmsg_len)); 131 if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size) 132 return (struct cmsghdr *)0; 133 134 return __ptr; 135} 136 137static inline struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg) 138{ 139 return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg); 140} 141 142static inline size_t msg_data_left(struct msghdr *msg) 143{ 144 return iov_iter_count(&msg->msg_iter); 145} 146 147/* "Socket"-level control message types: */ 148 149#define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */ 150#define SCM_CREDENTIALS 0x02 /* rw: struct ucred */ 151#define SCM_SECURITY 0x03 /* rw: security label */ 152 153struct ucred { 154 __u32 pid; 155 __u32 uid; 156 __u32 gid; 157}; 158 159/* Supported address families. */ 160#define AF_UNSPEC 0 161#define AF_UNIX 1 /* Unix domain sockets */ 162#define AF_LOCAL 1 /* POSIX name for AF_UNIX */ 163#define AF_INET 2 /* Internet IP Protocol */ 164#define AF_AX25 3 /* Amateur Radio AX.25 */ 165#define AF_IPX 4 /* Novell IPX */ 166#define AF_APPLETALK 5 /* AppleTalk DDP */ 167#define AF_NETROM 6 /* Amateur Radio NET/ROM */ 168#define AF_BRIDGE 7 /* Multiprotocol bridge */ 169#define AF_ATMPVC 8 /* ATM PVCs */ 170#define AF_X25 9 /* Reserved for X.25 project */ 171#define AF_INET6 10 /* IP version 6 */ 172#define AF_ROSE 11 /* Amateur Radio X.25 PLP */ 173#define AF_DECnet 12 /* Reserved for DECnet project */ 174#define AF_NETBEUI 13 /* Reserved for 802.2LLC project*/ 175#define AF_SECURITY 14 /* Security callback pseudo AF */ 176#define AF_KEY 15 /* PF_KEY key management API */ 177#define AF_NETLINK 16 178#define AF_ROUTE AF_NETLINK /* Alias to emulate 4.4BSD */ 179#define AF_PACKET 17 /* Packet family */ 180#define AF_ASH 18 /* Ash */ 181#define AF_ECONET 19 /* Acorn Econet */ 182#define AF_ATMSVC 20 /* ATM SVCs */ 183#define AF_RDS 21 /* RDS sockets */ 184#define AF_SNA 22 /* Linux SNA Project (nutters!) */ 185#define AF_IRDA 23 /* IRDA sockets */ 186#define AF_PPPOX 24 /* PPPoX sockets */ 187#define AF_WANPIPE 25 /* Wanpipe API Sockets */ 188#define AF_LLC 26 /* Linux LLC */ 189#define AF_IB 27 /* Native InfiniBand address */ 190#define AF_MPLS 28 /* MPLS */ 191#define AF_CAN 29 /* Controller Area Network */ 192#define AF_TIPC 30 /* TIPC sockets */ 193#define AF_BLUETOOTH 31 /* Bluetooth sockets */ 194#define AF_IUCV 32 /* IUCV sockets */ 195#define AF_RXRPC 33 /* RxRPC sockets */ 196#define AF_ISDN 34 /* mISDN sockets */ 197#define AF_PHONET 35 /* Phonet sockets */ 198#define AF_IEEE802154 36 /* IEEE802154 sockets */ 199#define AF_CAIF 37 /* CAIF sockets */ 200#define AF_ALG 38 /* Algorithm sockets */ 201#define AF_NFC 39 /* NFC sockets */ 202#define AF_VSOCK 40 /* vSockets */ 203#define AF_MAX 41 /* For now.. */ 204 205/* Protocol families, same as address families. */ 206#define PF_UNSPEC AF_UNSPEC 207#define PF_UNIX AF_UNIX 208#define PF_LOCAL AF_LOCAL 209#define PF_INET AF_INET 210#define PF_AX25 AF_AX25 211#define PF_IPX AF_IPX 212#define PF_APPLETALK AF_APPLETALK 213#define PF_NETROM AF_NETROM 214#define PF_BRIDGE AF_BRIDGE 215#define PF_ATMPVC AF_ATMPVC 216#define PF_X25 AF_X25 217#define PF_INET6 AF_INET6 218#define PF_ROSE AF_ROSE 219#define PF_DECnet AF_DECnet 220#define PF_NETBEUI AF_NETBEUI 221#define PF_SECURITY AF_SECURITY 222#define PF_KEY AF_KEY 223#define PF_NETLINK AF_NETLINK 224#define PF_ROUTE AF_ROUTE 225#define PF_PACKET AF_PACKET 226#define PF_ASH AF_ASH 227#define PF_ECONET AF_ECONET 228#define PF_ATMSVC AF_ATMSVC 229#define PF_RDS AF_RDS 230#define PF_SNA AF_SNA 231#define PF_IRDA AF_IRDA 232#define PF_PPPOX AF_PPPOX 233#define PF_WANPIPE AF_WANPIPE 234#define PF_LLC AF_LLC 235#define PF_IB AF_IB 236#define PF_MPLS AF_MPLS 237#define PF_CAN AF_CAN 238#define PF_TIPC AF_TIPC 239#define PF_BLUETOOTH AF_BLUETOOTH 240#define PF_IUCV AF_IUCV 241#define PF_RXRPC AF_RXRPC 242#define PF_ISDN AF_ISDN 243#define PF_PHONET AF_PHONET 244#define PF_IEEE802154 AF_IEEE802154 245#define PF_CAIF AF_CAIF 246#define PF_ALG AF_ALG 247#define PF_NFC AF_NFC 248#define PF_VSOCK AF_VSOCK 249#define PF_MAX AF_MAX 250 251/* Maximum queue length specifiable by listen. */ 252#define SOMAXCONN 128 253 254/* Flags we can use with send/ and recv. 255 Added those for 1003.1g not all are supported yet 256 */ 257 258#define MSG_OOB 1 259#define MSG_PEEK 2 260#define MSG_DONTROUTE 4 261#define MSG_TRYHARD 4 /* Synonym for MSG_DONTROUTE for DECnet */ 262#define MSG_CTRUNC 8 263#define MSG_PROBE 0x10 /* Do not send. Only probe path f.e. for MTU */ 264#define MSG_TRUNC 0x20 265#define MSG_DONTWAIT 0x40 /* Nonblocking io */ 266#define MSG_EOR 0x80 /* End of record */ 267#define MSG_WAITALL 0x100 /* Wait for a full request */ 268#define MSG_FIN 0x200 269#define MSG_SYN 0x400 270#define MSG_CONFIRM 0x800 /* Confirm path validity */ 271#define MSG_RST 0x1000 272#define MSG_ERRQUEUE 0x2000 /* Fetch message from error queue */ 273#define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */ 274#define MSG_MORE 0x8000 /* Sender will send more */ 275#define MSG_WAITFORONE 0x10000 /* recvmmsg(): block until 1+ packets avail */ 276#define MSG_SENDPAGE_NOTLAST 0x20000 /* sendpage() internal : not the last page */ 277#define MSG_EOF MSG_FIN 278 279#define MSG_FASTOPEN 0x20000000 /* Send data in TCP SYN */ 280#define MSG_CMSG_CLOEXEC 0x40000000 /* Set close_on_exec for file 281 descriptor received through 282 SCM_RIGHTS */ 283#if defined(CONFIG_COMPAT) 284#define MSG_CMSG_COMPAT 0x80000000 /* This message needs 32 bit fixups */ 285#else 286#define MSG_CMSG_COMPAT 0 /* We never have 32 bit fixups */ 287#endif 288 289 290/* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */ 291#define SOL_IP 0 292/* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */ 293#define SOL_TCP 6 294#define SOL_UDP 17 295#define SOL_IPV6 41 296#define SOL_ICMPV6 58 297#define SOL_SCTP 132 298#define SOL_UDPLITE 136 /* UDP-Lite (RFC 3828) */ 299#define SOL_RAW 255 300#define SOL_IPX 256 301#define SOL_AX25 257 302#define SOL_ATALK 258 303#define SOL_NETROM 259 304#define SOL_ROSE 260 305#define SOL_DECNET 261 306#define SOL_X25 262 307#define SOL_PACKET 263 308#define SOL_ATM 264 /* ATM layer (cell level) */ 309#define SOL_AAL 265 /* ATM Adaption Layer (packet level) */ 310#define SOL_IRDA 266 311#define SOL_NETBEUI 267 312#define SOL_LLC 268 313#define SOL_DCCP 269 314#define SOL_NETLINK 270 315#define SOL_TIPC 271 316#define SOL_RXRPC 272 317#define SOL_PPPOL2TP 273 318#define SOL_BLUETOOTH 274 319#define SOL_PNPIPE 275 320#define SOL_RDS 276 321#define SOL_IUCV 277 322#define SOL_CAIF 278 323#define SOL_ALG 279 324#define SOL_NFC 280 325 326/* IPX options */ 327#define IPX_TYPE 1 328 329extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr); 330extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data); 331 332struct timespec; 333 334/* The __sys_...msg variants allow MSG_CMSG_COMPAT */ 335extern long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned flags); 336extern long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned flags); 337extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, 338 unsigned int flags, struct timespec *timeout); 339extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, 340 unsigned int vlen, unsigned int flags); 341#endif /* _LINUX_SOCKET_H */ 342