include/linux/socket.h

   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 typedef unsigned 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_IRDA         23      /* IRDA sockets                 */
 170 #define AF_MAX          32      /* For now.. */
 171
 172 /* Protocol families, same as address families. */
 173 #define PF_UNSPEC       AF_UNSPEC
 174 #define PF_UNIX         AF_UNIX
 175 #define PF_LOCAL        AF_LOCAL
 176 #define PF_INET         AF_INET
 177 #define PF_AX25         AF_AX25
 178 #define PF_IPX          AF_IPX
 179 #define PF_APPLETALK    AF_APPLETALK
 180 #define PF_NETROM       AF_NETROM
 181 #define PF_BRIDGE       AF_BRIDGE
 182 #define PF_ATMPVC       AF_ATMPVC
 183 #define PF_X25          AF_X25
 184 #define PF_INET6        AF_INET6
 185 #define PF_ROSE         AF_ROSE
 186 #define PF_DECnet       AF_DECnet
 187 #define PF_NETBEUI      AF_NETBEUI
 188 #define PF_SECURITY     AF_SECURITY
 189 #define PF_KEY          pseudo_AF_KEY
 190 #define PF_NETLINK      AF_NETLINK
 191 #define PF_ROUTE        AF_ROUTE
 192 #define PF_PACKET       AF_PACKET
 193 #define PF_ASH          AF_ASH
 194 #define PF_ECONET       AF_ECONET
 195 #define PF_ATMSVC       AF_ATMSVC
 196 #define PF_SNA          AF_SNA
 197 #define PF_IRDA         AF_IRDA
 198
 199 #define PF_MAX          AF_MAX
 200
 201 /* Maximum queue length specifiable by listen.  */
 202 #define SOMAXCONN       128
 203
 204 /* Flags we can use with send/ and recv.
 205    Added those for 1003.1g not all are supported yet
 206  */
 207
 208 #define MSG_OOB         1
 209 #define MSG_PEEK        2
 210 #define MSG_DONTROUTE   4
 211 #define MSG_TRYHARD     4       /* Synonym for MSG_DONTROUTE for DECnet */
 212 #define MSG_CTRUNC      8
 213 #define MSG_PROXY       0x10    /* Supply or ask second address. */
 214 #define MSG_TRUNC       0x20
 215 #define MSG_DONTWAIT    0x40    /* Nonblocking io                */
 216 #define MSG_EOR         0x80    /* End of record */
 217 #define MSG_WAITALL     0x100   /* Wait for a full request */
 218 #define MSG_FIN         0x200
 219 #define MSG_SYN         0x400
 220 #define MSG_URG         0x800
 221 #define MSG_RST         0x1000
 222 #define MSG_ERRQUEUE    0x2000
 223 #define MSG_NOSIGNAL    0x4000
 224
 225 #define MSG_CTLIGNORE   0x80000000
 226
 227 #define MSG_EOF         MSG_FIN
 228 #define MSG_CTLFLAGS    (MSG_OOB|MSG_URG|MSG_FIN|MSG_SYN|MSG_RST)
 229
 230
 231 /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
 232 #define SOL_IP          0
 233 /* #define SOL_ICMP     1       No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
 234 #define SOL_TCP         6
 235 #define SOL_UDP         17
 236 #define SOL_IPV6        41
 237 #define SOL_ICMPV6      58
 238 #define SOL_RAW         255
 239 #define SOL_IPX         256
 240 #define SOL_AX25        257
 241 #define SOL_ATALK       258
 242 #define SOL_NETROM      259
 243 #define SOL_ROSE        260
 244 #define SOL_DECNET      261
 245 #define SOL_X25         262
 246 #define SOL_PACKET      263
 247 #define SOL_ATM         264     /* ATM layer (cell level) */
 248 #define SOL_AAL         265     /* ATM Adaption Layer (packet level) */
 249 #define SOL_IRDA        266
 250
 251 /* IPX options */
 252 #define IPX_TYPE        1
 253
 254 /* TCP options - this way around because someone left a set in the c library includes */
 255 #define TCP_NODELAY     1
 256 #define TCP_MAXSEG      2
 257 #define TCP_CORK        3       /* Linux specific (for use with sendfile) */
 258
 259 #ifdef __KERNEL__
 260 extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
 261 extern int memcpy_fromiovecend(unsigned char *kdata, struct iovec *iov,
 262                                 int offset, int len);
 263 extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
 264                                           struct iovec *iov,
 265                                           int offset,
 266                                           unsigned int len, int *csump);
 267
 268 extern int verify_iovec(struct msghdr *m, struct iovec *iov, char *address, int mode);
 269 extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);
 270 extern void memcpy_tokerneliovec(struct iovec *iov, unsigned char *kdata, int len);
 271 extern int move_addr_to_user(void *kaddr, int klen, void *uaddr, int *ulen);
 272 extern int move_addr_to_kernel(void *uaddr, int ulen, void *kaddr);
 273 extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
 274 #endif
 275 #endif /* not kernel and not glibc */
 276 #endif /* _LINUX_SOCKET_H */