include/linux/socket.h

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 1 #ifndef _LINUX_SOCKET_H
 2 #define _LINUX_SOCKET_H
 3
 4 #if defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2)
 5
 6 #include <asm/socket.h>/* arch-dependent defines */
 7 #include <linux/sockios.h>/* the SIOCxxx I/O controls */
 8 #include <linux/uio.h>/* iovec support */
 9 #include <linux/types.h>/* pid_t */
 10
 11 typedefunsigned short sa_family_t;
 12
 13 /*
 14  * 1003.1g requires sa_family_t and that sa_data is char.
 15  */
 16
 17 struct sockaddr {
 18  sa_family_t sa_family;/* address family, AF_xxx */
 19 char sa_data[14];/* 14 bytes of protocol address */
 20 };
 21
 22 struct linger {
 23 int l_onoff;/* Linger active */
 24 int l_linger;/* How long to linger for */
 25 };
 26
 27 /*
 28  * As we do 4.4BSD message passing we use a 4.4BSD message passing
 29  * system, not 4.3. Thus msg_accrights(len) are now missing. They
 30  * belong in an obscure libc emulation or the bin.
 31  */
 32
 33 struct msghdr {
 34 void* msg_name;/* Socket name */
 35 int msg_namelen;/* Length of name */
 36 struct iovec * msg_iov;/* Data blocks */
 37  __kernel_size_t msg_iovlen;/* Number of blocks */
 38 void* msg_control;/* Per protocol magic (eg BSD file descriptor passing) */
 39  __kernel_size_t msg_controllen;/* Length of cmsg list */
 40 unsigned msg_flags;
 41 };
 42
 43 /*
 44  * POSIX 1003.1g - ancillary data object information
 45  * Ancillary data consits of a sequence of pairs of
 46  * (cmsghdr, cmsg_data[])
 47  */
 48
 49 struct cmsghdr {
 50  __kernel_size_t cmsg_len;/* data byte count, including hdr */
 51 int cmsg_level;/* originating protocol */
 52 int cmsg_type;/* protocol-specific type */
 53 };
 54
 55 /*
 56  * Ancilliary data object information MACROS
 57  * Table 5-14 of POSIX 1003.1g
 58  */
 59
 60 #define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
 61 #define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
 62
 63 #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
 64
 65 #define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
 66 #define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
 67 #define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
 68
 69 #define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
 70  (struct cmsghdr *)(ctl) : \
 71  (struct cmsghdr *)NULL)
 72 #define CMSG_FIRSTHDR(msg) __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
 73
 74 /*
 75  * This mess will go away with glibc
 76  */
 77
 78 #ifdef __KERNEL__
 79 #define __KINLINE static inline
 80 #elif defined(__GNUC__)
 81 #define __KINLINE static __inline__
 82 #elif defined(__cplusplus)
 83 #define __KINLINE static inline
 84 #else
 85 #define __KINLINE static
 86 #endif
 87
 88
 89 /*
 90  * Get the next cmsg header
 91  *
 92  * PLEASE, do not touch this function. If you think, that it is
 93  * incorrect, grep kernel sources and think about consequences
 94  * before trying to improve it.
 95  *
 96  * Now it always returns valid, not truncated ancillary object
 97  * HEADER. But caller still MUST check, that cmsg->cmsg_len is
 98  * inside range, given by msg->msg_controllen before using
 99  * ansillary object DATA. --ANK (980731)
 100  */
 101
 102 __KINLINE struct cmsghdr *__cmsg_nxthdr(void*__ctl, __kernel_size_t __size,
 103 struct cmsghdr *__cmsg)
 104 {
 105 struct cmsghdr * __ptr;
 106
 107  __ptr = (struct cmsghdr*)(((unsigned char*) __cmsg) +CMSG_ALIGN(__cmsg->cmsg_len));
 108 if((unsigned long)((char*)(__ptr+1) - (char*) __ctl) > __size)
 109 return(struct cmsghdr *)0;
 110
 111 return __ptr;
 112 }
 113
 114 __KINLINE struct cmsghdr *cmsg_nxthdr(struct msghdr *__msg,struct cmsghdr *__cmsg)
 115 {
 116 return__cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
 117 }
 118
 119 /* "Socket"-level control message types: */
 120
 121 #define SCM_RIGHTS 0x01/* rw: access rights (array of int) */
 122 #define SCM_CREDENTIALS 0x02/* rw: struct ucred */
 123 #define SCM_CONNECT 0x03/* rw: struct scm_connect */
 124
 125 struct ucred {
 126  __u32 pid;
 127  __u32 uid;
 128  __u32 gid;
 129 };
 130
 131 /* Supported address families. */
 132 #define AF_UNSPEC 0
 133 #define AF_UNIX 1/* Unix domain sockets */
 134 #define AF_LOCAL 1/* POSIX name for AF_UNIX */
 135 #define AF_INET 2/* Internet IP Protocol */
 136 #define AF_AX25 3/* Amateur Radio AX.25 */
 137 #define AF_IPX 4/* Novell IPX */
 138 #define AF_APPLETALK 5/* AppleTalk DDP */
 139 #define AF_NETROM 6/* Amateur Radio NET/ROM */
 140 #define AF_BRIDGE 7/* Multiprotocol bridge */
 141 #define AF_ATMPVC 8/* ATM PVCs */
 142 #define AF_X25 9/* Reserved for X.25 project */
 143 #define AF_INET6 10/* IP version 6 */
 144 #define AF_ROSE 11/* Amateur Radio X.25 PLP */
 145 #define AF_DECnet 12/* Reserved for DECnet project */
 146 #define AF_NETBEUI 13/* Reserved for 802.2LLC project*/
 147 #define AF_SECURITY 14/* Security callback pseudo AF */
 148 #define AF_KEY 15/* PF_KEY key management API */
 149 #define AF_NETLINK 16
 150 #define AF_ROUTE AF_NETLINK/* Alias to emulate 4.4BSD */
 151 #define AF_PACKET 17/* Packet family */
 152 #define AF_ASH 18/* Ash */
 153 #define AF_ECONET 19/* Acorn Econet */
 154 #define AF_ATMSVC 20/* ATM SVCs */
 155 #define AF_SNA 22/* Linux SNA Project (nutters!) */
 156 #define AF_IRDA 23/* IRDA sockets */
 157 #define AF_PPPOX 24/* PPPoX sockets */
 158 #define AF_MAX 32/* For now.. */
 159
 160 /* Protocol families, same as address families. */
 161 #define PF_UNSPEC AF_UNSPEC
 162 #define PF_UNIX AF_UNIX
 163 #define PF_LOCAL AF_LOCAL
 164 #define PF_INET AF_INET
 165 #define PF_AX25 AF_AX25
 166 #define PF_IPX AF_IPX
 167 #define PF_APPLETALK AF_APPLETALK
 168 #define PF_NETROM AF_NETROM
 169 #define PF_BRIDGE AF_BRIDGE
 170 #define PF_ATMPVC AF_ATMPVC
 171 #define PF_X25 AF_X25
 172 #define PF_INET6 AF_INET6
 173 #define PF_ROSE AF_ROSE
 174 #define PF_DECnet AF_DECnet
 175 #define PF_NETBEUI AF_NETBEUI
 176 #define PF_SECURITY AF_SECURITY
 177 #define PF_KEY AF_KEY
 178 #define PF_NETLINK AF_NETLINK
 179 #define PF_ROUTE AF_ROUTE
 180 #define PF_PACKET AF_PACKET
 181 #define PF_ASH AF_ASH
 182 #define PF_ECONET AF_ECONET
 183 #define PF_ATMSVC AF_ATMSVC
 184 #define PF_SNA AF_SNA
 185 #define PF_IRDA AF_IRDA
 186 #define PF_PPPOX AF_PPPOX
 187 #define PF_MAX AF_MAX
 188
 189 /* Maximum queue length specifiable by listen. */
 190 #define SOMAXCONN 128
 191
 192 /* Flags we can use with send/ and recv.
 193  Added those for 1003.1g not all are supported yet
 194  */
 195
 196 #define MSG_OOB 1
 197 #define MSG_PEEK 2
 198 #define MSG_DONTROUTE 4
 199 #define MSG_TRYHARD 4/* Synonym for MSG_DONTROUTE for DECnet */
 200 #define MSG_CTRUNC 8
 201 #define MSG_PROBE 0x10/* Do not send. Only probe path f.e. for MTU */
 202 #define MSG_TRUNC 0x20
 203 #define MSG_DONTWAIT 0x40/* Nonblocking io */
 204 #define MSG_EOR 0x80/* End of record */
 205 #define MSG_WAITALL 0x100/* Wait for a full request */
 206 #define MSG_FIN 0x200
 207 #define MSG_SYN 0x400
 208 #define MSG_CONFIRM 0x800/* Confirm path validity */
 209 #define MSG_RST 0x1000
 210 #define MSG_ERRQUEUE 0x2000/* Fetch message from error queue */
 211 #define MSG_NOSIGNAL 0x4000/* Do not generate SIGPIPE */
 212
 213 #define MSG_EOF MSG_FIN
 214
 215
 216 /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
 217 #define SOL_IP 0
 218 /* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
 219 #define SOL_TCP 6
 220 #define SOL_UDP 17
 221 #define SOL_IPV6 41
 222 #define SOL_ICMPV6 58
 223 #define SOL_RAW 255
 224 #define SOL_IPX 256
 225 #define SOL_AX25 257
 226 #define SOL_ATALK 258
 227 #define SOL_NETROM 259
 228 #define SOL_ROSE 260
 229 #define SOL_DECNET 261
 230 #define SOL_X25 262
 231 #define SOL_PACKET 263
 232 #define SOL_ATM 264/* ATM layer (cell level) */
 233 #define SOL_AAL 265/* ATM Adaption Layer (packet level) */
 234 #define SOL_IRDA 266
 235
 236 /* IPX options */
 237 #define IPX_TYPE 1
 238
 239 #ifdef __KERNEL__
 240 externintmemcpy_fromiovec(unsigned char*kdata,struct iovec *iov,int len);
 241 externintmemcpy_fromiovecend(unsigned char*kdata,struct iovec *iov,
 242 int offset,int len);
 243 externintcsum_partial_copy_fromiovecend(unsigned char*kdata,
 244 struct iovec *iov,
 245 int offset,
 246 unsigned int len,int*csump);
 247
 248 externintverify_iovec(struct msghdr *m,struct iovec *iov,char*address,int mode);
 249 externintmemcpy_toiovec(struct iovec *v,unsigned char*kdata,int len);
 250 externvoidmemcpy_tokerneliovec(struct iovec *iov,unsigned char*kdata,int len);
 251 externintmove_addr_to_user(void*kaddr,int klen,void*uaddr,int*ulen);
 252 externintmove_addr_to_kernel(void*uaddr,int ulen,void*kaddr);
 253 externintput_cmsg(struct msghdr*,int level,int type,int len,void*data);
 254 #endif
 255 #endif/* not kernel and not glibc */
 256 #endif/* _LINUX_SOCKET_H */