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 extern __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 NULL;
 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 /* Socket types. */
 132
 133 #define SOCK_STREAM 1/* stream (connection) socket */
 134 #define SOCK_DGRAM 2/* datagram (conn.less) socket */
 135 #define SOCK_RAW 3/* raw socket */
 136 #define SOCK_RDM 4/* reliably-delivered message */
 137 #define SOCK_SEQPACKET 5/* sequential packet socket */
 138 #define SOCK_PACKET 10/* linux specific way of */
 139 /* getting packets at the dev */
 140 /* level. For writing rarp and */
 141 /* other similar things on the */
 142 /* user level. */
 143
 144 /* Supported address families. */
 145 #define AF_UNSPEC 0
 146 #define AF_UNIX 1/* Unix domain sockets */
 147 #define AF_LOCAL 1/* POSIX name for AF_UNIX */
 148 #define AF_INET 2/* Internet IP Protocol */
 149 #define AF_AX25 3/* Amateur Radio AX.25 */
 150 #define AF_IPX 4/* Novell IPX */
 151 #define AF_APPLETALK 5/* AppleTalk DDP */
 152 #define AF_NETROM 6/* Amateur Radio NET/ROM */
 153 #define AF_BRIDGE 7/* Multiprotocol bridge */
 154 #define AF_ATMPVC 8/* ATM PVCs */
 155 #define AF_X25 9/* Reserved for X.25 project */
 156 #define AF_INET6 10/* IP version 6 */
 157 #define AF_ROSE 11/* Amateur Radio X.25 PLP */
 158 #define AF_DECnet 12/* Reserved for DECnet project */
 159 #define AF_NETBEUI 13/* Reserved for 802.2LLC project*/
 160 #define AF_SECURITY 14/* Security callback pseudo AF */
 161 #define pseudo_AF_KEY 15/* PF_KEY key management API */
 162 #define AF_NETLINK 16
 163 #define AF_ROUTE AF_NETLINK/* Alias to emulate 4.4BSD */
 164 #define AF_PACKET 17/* Packet family */
 165 #define AF_ASH 18/* Ash */
 166 #define AF_ECONET 19/* Acorn Econet */
 167 #define AF_ATMSVC 20/* ATM SVCs */
 168 #define AF_SNA 22/* Linux SNA Project (nutters!) */
 169 #define AF_MAX 32/* For now.. */
 170
 171 /* Protocol families, same as address families. */
 172 #define PF_UNSPEC AF_UNSPEC
 173 #define PF_UNIX AF_UNIX
 174 #define PF_LOCAL AF_LOCAL
 175 #define PF_INET AF_INET
 176 #define PF_AX25 AF_AX25
 177 #define PF_IPX AF_IPX
 178 #define PF_APPLETALK AF_APPLETALK
 179 #define PF_NETROM AF_NETROM
 180 #define PF_BRIDGE AF_BRIDGE
 181 #define PF_ATMPVC AF_ATMPVC
 182 #define PF_X25 AF_X25
 183 #define PF_INET6 AF_INET6
 184 #define PF_ROSE AF_ROSE
 185 #define PF_DECnet AF_DECnet
 186 #define PF_NETBEUI AF_NETBEUI
 187 #define PF_SECURITY AF_SECURITY
 188 #define PF_KEY pseudo_AF_KEY
 189 #define PF_NETLINK AF_NETLINK
 190 #define PF_ROUTE AF_ROUTE
 191 #define PF_PACKET AF_PACKET
 192 #define PF_ASH AF_ASH
 193 #define PF_ECONET AF_ECONET
 194 #define PF_ATMSVC AF_ATMSVC
 195 #define PF_SNA AF_SNA
 196
 197 #define PF_MAX AF_MAX
 198
 199 /* Maximum queue length specifiable by listen. */
 200 #define SOMAXCONN 128
 201
 202 /* Flags we can use with send/ and recv.
 203  Added those for 1003.1g not all are supported yet
 204  */
 205
 206 #define MSG_OOB 1
 207 #define MSG_PEEK 2
 208 #define MSG_DONTROUTE 4
 209 #define MSG_CTRUNC 8
 210 #define MSG_PROXY 0x10/* Supply or ask second address. */
 211 #define MSG_TRUNC 0x20
 212 #define MSG_DONTWAIT 0x40/* Nonblocking io */
 213 #define MSG_EOR 0x80/* End of record */
 214 #define MSG_WAITALL 0x100/* Wait for a full request */
 215 #define MSG_FIN 0x200
 216 #define MSG_SYN 0x400
 217 #define MSG_URG 0x800
 218 #define MSG_RST 0x1000
 219 #define MSG_ERRQUEUE 0x2000
 220 #define MSG_NOSIGNAL 0x4000
 221
 222 #define MSG_CTLIGNORE 0x80000000
 223
 224 #define MSG_EOF MSG_FIN
 225 #define MSG_CTLFLAGS (MSG_OOB|MSG_URG|MSG_FIN|MSG_SYN|MSG_RST)
 226
 227
 228 /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
 229 #define SOL_IP 0
 230 /* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
 231 #define SOL_TCP 6
 232 #define SOL_UDP 17
 233 #define SOL_IPV6 41
 234 #define SOL_ICMPV6 58
 235 #define SOL_RAW 255
 236 #define SOL_IPX 256
 237 #define SOL_AX25 257
 238 #define SOL_ATALK 258
 239 #define SOL_NETROM 259
 240 #define SOL_ROSE 260
 241 #define SOL_DECNET 261
 242 #define SOL_X25 262
 243 #define SOL_PACKET 263
 244 #define SOL_ATM 264/* ATM layer (cell level) */
 245 #define SOL_AAL 265/* ATM Adaption Layer (packet level) */
 246
 247 /* IPX options */
 248 #define IPX_TYPE 1
 249
 250 /* TCP options - this way around because someone left a set in the c library includes */
 251 #define TCP_NODELAY 1
 252 #define TCP_MAXSEG 2
 253
 254 #ifdef __KERNEL__
 255 externintmemcpy_fromiovec(unsigned char*kdata,struct iovec *iov,int len);
 256 externintmemcpy_fromiovecend(unsigned char*kdata,struct iovec *iov,
 257 int offset,int len);
 258 externintcsum_partial_copy_fromiovecend(unsigned char*kdata,
 259 struct iovec *iov,
 260 int offset,
 261 unsigned int len,int*csump);
 262
 263 externintverify_iovec(struct msghdr *m,struct iovec *iov,char*address,int mode);
 264 externintmemcpy_toiovec(struct iovec *v,unsigned char*kdata,int len);
 265 externintmove_addr_to_user(void*kaddr,int klen,void*uaddr,int*ulen);
 266 externintmove_addr_to_kernel(void*uaddr,int ulen,void*kaddr);
 267 externintput_cmsg(struct msghdr*,int level,int type,int len,void*data);
 268 #endif
 269 #endif/* not kernel and not glibc */
 270 #endif/* _LINUX_SOCKET_H */