Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | #ifndef _LINUX_SOCKET_H |
| 2 | #define _LINUX_SOCKET_H |
| 3 | |
| 4 | /* |
| 5 | * Desired design of maximum size and alignment (see RFC2553) |
| 6 | */ |
| 7 | #define _K_SS_MAXSIZE 128 /* Implementation specific max size */ |
| 8 | #define _K_SS_ALIGNSIZE (__alignof__ (struct sockaddr *)) |
| 9 | /* Implementation specific desired alignment */ |
| 10 | |
| 11 | struct __kernel_sockaddr_storage { |
| 12 | unsigned short ss_family; /* address family */ |
| 13 | /* Following field(s) are implementation specific */ |
| 14 | char __data[_K_SS_MAXSIZE - sizeof(unsigned short)]; |
| 15 | /* space to achieve desired size, */ |
| 16 | /* _SS_MAXSIZE value minus size of ss_family */ |
| 17 | } __attribute__ ((aligned(_K_SS_ALIGNSIZE))); /* force desired alignment */ |
| 18 | |
| 19 | #if defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2) |
| 20 | |
| 21 | #include <linux/config.h> /* for CONFIG_COMPAT */ |
| 22 | #include <linux/linkage.h> |
| 23 | #include <asm/socket.h> /* arch-dependent defines */ |
| 24 | #include <linux/sockios.h> /* the SIOCxxx I/O controls */ |
| 25 | #include <linux/uio.h> /* iovec support */ |
| 26 | #include <linux/types.h> /* pid_t */ |
| 27 | #include <linux/compiler.h> /* __user */ |
| 28 | |
| 29 | typedef unsigned short sa_family_t; |
| 30 | |
| 31 | /* |
| 32 | * 1003.1g requires sa_family_t and that sa_data is char. |
| 33 | */ |
| 34 | |
| 35 | struct sockaddr { |
| 36 | sa_family_t sa_family; /* address family, AF_xxx */ |
| 37 | char sa_data[14]; /* 14 bytes of protocol address */ |
| 38 | }; |
| 39 | |
| 40 | struct linger { |
| 41 | int l_onoff; /* Linger active */ |
| 42 | int l_linger; /* How long to linger for */ |
| 43 | }; |
| 44 | |
| 45 | #define sockaddr_storage __kernel_sockaddr_storage |
| 46 | |
| 47 | /* |
| 48 | * As we do 4.4BSD message passing we use a 4.4BSD message passing |
| 49 | * system, not 4.3. Thus msg_accrights(len) are now missing. They |
| 50 | * belong in an obscure libc emulation or the bin. |
| 51 | */ |
| 52 | |
| 53 | struct msghdr { |
| 54 | void * msg_name; /* Socket name */ |
| 55 | int msg_namelen; /* Length of name */ |
| 56 | struct iovec * msg_iov; /* Data blocks */ |
| 57 | __kernel_size_t msg_iovlen; /* Number of blocks */ |
| 58 | void * msg_control; /* Per protocol magic (eg BSD file descriptor passing) */ |
| 59 | __kernel_size_t msg_controllen; /* Length of cmsg list */ |
| 60 | unsigned msg_flags; |
| 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 | * Ancilliary 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 | * This mess will go away with glibc |
| 100 | */ |
| 101 | |
| 102 | #ifdef __KERNEL__ |
| 103 | #define __KINLINE static inline |
| 104 | #elif defined(__GNUC__) |
| 105 | #define __KINLINE static __inline__ |
| 106 | #elif defined(__cplusplus) |
| 107 | #define __KINLINE static inline |
| 108 | #else |
| 109 | #define __KINLINE static |
| 110 | #endif |
| 111 | |
| 112 | |
| 113 | /* |
| 114 | * Get the next cmsg header |
| 115 | * |
| 116 | * PLEASE, do not touch this function. If you think, that it is |
| 117 | * incorrect, grep kernel sources and think about consequences |
| 118 | * before trying to improve it. |
| 119 | * |
| 120 | * Now it always returns valid, not truncated ancillary object |
| 121 | * HEADER. But caller still MUST check, that cmsg->cmsg_len is |
| 122 | * inside range, given by msg->msg_controllen before using |
| 123 | * ancillary object DATA. --ANK (980731) |
| 124 | */ |
| 125 | |
| 126 | __KINLINE struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size, |
| 127 | struct cmsghdr *__cmsg) |
| 128 | { |
| 129 | struct cmsghdr * __ptr; |
| 130 | |
| 131 | __ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) + CMSG_ALIGN(__cmsg->cmsg_len)); |
| 132 | if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size) |
| 133 | return (struct cmsghdr *)0; |
| 134 | |
| 135 | return __ptr; |
| 136 | } |
| 137 | |
| 138 | __KINLINE struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg) |
| 139 | { |
| 140 | return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg); |
| 141 | } |
| 142 | |
| 143 | /* "Socket"-level control message types: */ |
| 144 | |
| 145 | #define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */ |
| 146 | #define SCM_CREDENTIALS 0x02 /* rw: struct ucred */ |
| 147 | |
| 148 | struct ucred { |
| 149 | __u32 pid; |
| 150 | __u32 uid; |
| 151 | __u32 gid; |
| 152 | }; |
| 153 | |
| 154 | /* Supported address families. */ |
| 155 | #define AF_UNSPEC 0 |
| 156 | #define AF_UNIX 1 /* Unix domain sockets */ |
| 157 | #define AF_LOCAL 1 /* POSIX name for AF_UNIX */ |
| 158 | #define AF_INET 2 /* Internet IP Protocol */ |
| 159 | #define AF_AX25 3 /* Amateur Radio AX.25 */ |
| 160 | #define AF_IPX 4 /* Novell IPX */ |
| 161 | #define AF_APPLETALK 5 /* AppleTalk DDP */ |
| 162 | #define AF_NETROM 6 /* Amateur Radio NET/ROM */ |
| 163 | #define AF_BRIDGE 7 /* Multiprotocol bridge */ |
| 164 | #define AF_ATMPVC 8 /* ATM PVCs */ |
| 165 | #define AF_X25 9 /* Reserved for X.25 project */ |
| 166 | #define AF_INET6 10 /* IP version 6 */ |
| 167 | #define AF_ROSE 11 /* Amateur Radio X.25 PLP */ |
| 168 | #define AF_DECnet 12 /* Reserved for DECnet project */ |
| 169 | #define AF_NETBEUI 13 /* Reserved for 802.2LLC project*/ |
| 170 | #define AF_SECURITY 14 /* Security callback pseudo AF */ |
| 171 | #define AF_KEY 15 /* PF_KEY key management API */ |
| 172 | #define AF_NETLINK 16 |
| 173 | #define AF_ROUTE AF_NETLINK /* Alias to emulate 4.4BSD */ |
| 174 | #define AF_PACKET 17 /* Packet family */ |
| 175 | #define AF_ASH 18 /* Ash */ |
| 176 | #define AF_ECONET 19 /* Acorn Econet */ |
| 177 | #define AF_ATMSVC 20 /* ATM SVCs */ |
| 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_BLUETOOTH 31 /* Bluetooth sockets */ |
| 184 | #define AF_MAX 32 /* For now.. */ |
| 185 | |
| 186 | /* Protocol families, same as address families. */ |
| 187 | #define PF_UNSPEC AF_UNSPEC |
| 188 | #define PF_UNIX AF_UNIX |
| 189 | #define PF_LOCAL AF_LOCAL |
| 190 | #define PF_INET AF_INET |
| 191 | #define PF_AX25 AF_AX25 |
| 192 | #define PF_IPX AF_IPX |
| 193 | #define PF_APPLETALK AF_APPLETALK |
| 194 | #define PF_NETROM AF_NETROM |
| 195 | #define PF_BRIDGE AF_BRIDGE |
| 196 | #define PF_ATMPVC AF_ATMPVC |
| 197 | #define PF_X25 AF_X25 |
| 198 | #define PF_INET6 AF_INET6 |
| 199 | #define PF_ROSE AF_ROSE |
| 200 | #define PF_DECnet AF_DECnet |
| 201 | #define PF_NETBEUI AF_NETBEUI |
| 202 | #define PF_SECURITY AF_SECURITY |
| 203 | #define PF_KEY AF_KEY |
| 204 | #define PF_NETLINK AF_NETLINK |
| 205 | #define PF_ROUTE AF_ROUTE |
| 206 | #define PF_PACKET AF_PACKET |
| 207 | #define PF_ASH AF_ASH |
| 208 | #define PF_ECONET AF_ECONET |
| 209 | #define PF_ATMSVC AF_ATMSVC |
| 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_BLUETOOTH AF_BLUETOOTH |
| 216 | #define PF_MAX AF_MAX |
| 217 | |
| 218 | /* Maximum queue length specifiable by listen. */ |
| 219 | #define SOMAXCONN 128 |
| 220 | |
| 221 | /* Flags we can use with send/ and recv. |
| 222 | Added those for 1003.1g not all are supported yet |
| 223 | */ |
| 224 | |
| 225 | #define MSG_OOB 1 |
| 226 | #define MSG_PEEK 2 |
| 227 | #define MSG_DONTROUTE 4 |
| 228 | #define MSG_TRYHARD 4 /* Synonym for MSG_DONTROUTE for DECnet */ |
| 229 | #define MSG_CTRUNC 8 |
| 230 | #define MSG_PROBE 0x10 /* Do not send. Only probe path f.e. for MTU */ |
| 231 | #define MSG_TRUNC 0x20 |
| 232 | #define MSG_DONTWAIT 0x40 /* Nonblocking io */ |
| 233 | #define MSG_EOR 0x80 /* End of record */ |
| 234 | #define MSG_WAITALL 0x100 /* Wait for a full request */ |
| 235 | #define MSG_FIN 0x200 |
| 236 | #define MSG_SYN 0x400 |
| 237 | #define MSG_CONFIRM 0x800 /* Confirm path validity */ |
| 238 | #define MSG_RST 0x1000 |
| 239 | #define MSG_ERRQUEUE 0x2000 /* Fetch message from error queue */ |
| 240 | #define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */ |
| 241 | #define MSG_MORE 0x8000 /* Sender will send more */ |
| 242 | |
| 243 | #define MSG_EOF MSG_FIN |
| 244 | |
| 245 | #if defined(CONFIG_COMPAT) |
| 246 | #define MSG_CMSG_COMPAT 0x80000000 /* This message needs 32 bit fixups */ |
| 247 | #else |
| 248 | #define MSG_CMSG_COMPAT 0 /* We never have 32 bit fixups */ |
| 249 | #endif |
| 250 | |
| 251 | |
| 252 | /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */ |
| 253 | #define SOL_IP 0 |
| 254 | /* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */ |
| 255 | #define SOL_TCP 6 |
| 256 | #define SOL_UDP 17 |
| 257 | #define SOL_IPV6 41 |
| 258 | #define SOL_ICMPV6 58 |
| 259 | #define SOL_SCTP 132 |
| 260 | #define SOL_RAW 255 |
| 261 | #define SOL_IPX 256 |
| 262 | #define SOL_AX25 257 |
| 263 | #define SOL_ATALK 258 |
| 264 | #define SOL_NETROM 259 |
| 265 | #define SOL_ROSE 260 |
| 266 | #define SOL_DECNET 261 |
| 267 | #define SOL_X25 262 |
| 268 | #define SOL_PACKET 263 |
| 269 | #define SOL_ATM 264 /* ATM layer (cell level) */ |
| 270 | #define SOL_AAL 265 /* ATM Adaption Layer (packet level) */ |
| 271 | #define SOL_IRDA 266 |
| 272 | #define SOL_NETBEUI 267 |
| 273 | #define SOL_LLC 268 |
| 274 | |
| 275 | /* IPX options */ |
| 276 | #define IPX_TYPE 1 |
| 277 | |
| 278 | #ifdef __KERNEL__ |
| 279 | extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len); |
| 280 | extern int memcpy_fromiovecend(unsigned char *kdata, struct iovec *iov, |
| 281 | int offset, int len); |
| 282 | extern int csum_partial_copy_fromiovecend(unsigned char *kdata, |
| 283 | struct iovec *iov, |
| 284 | int offset, |
| 285 | unsigned int len, int *csump); |
| 286 | |
| 287 | extern int verify_iovec(struct msghdr *m, struct iovec *iov, char *address, int mode); |
| 288 | extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len); |
| 289 | extern int move_addr_to_user(void *kaddr, int klen, void __user *uaddr, int __user *ulen); |
| 290 | extern int move_addr_to_kernel(void __user *uaddr, int ulen, void *kaddr); |
| 291 | extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data); |
| 292 | |
| 293 | #endif |
| 294 | #endif /* not kernel and not glibc */ |
| 295 | #endif /* _LINUX_SOCKET_H */ |