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 extern int sysctl_somaxconn; 30 extern void sock_init(void); 31 #ifdef CONFIG_PROC_FS 32 struct seq_file; 33 extern void socket_seq_show(struct seq_file *seq); 34 #endif 35 36 typedef unsigned short sa_family_t; 37 38 /* 39 * 1003.1g requires sa_family_t and that sa_data is char. 40 */ 41 42 struct sockaddr { 43 sa_family_t sa_family; /* address family, AF_xxx */ 44 char sa_data[14]; /* 14 bytes of protocol address */ 45 }; 46 47 struct linger { 48 int l_onoff; /* Linger active */ 49 int l_linger; /* How long to linger for */ 50 }; 51 52 #define sockaddr_storage __kernel_sockaddr_storage 53 54 /* 55 * As we do 4.4BSD message passing we use a 4.4BSD message passing 56 * system, not 4.3. Thus msg_accrights(len) are now missing. They 57 * belong in an obscure libc emulation or the bin. 58 */ 59 60 struct msghdr { 61 void * msg_name; /* Socket name */ 62 int msg_namelen; /* Length of name */ 63 struct iovec * msg_iov; /* Data blocks */ 64 __kernel_size_t msg_iovlen; /* Number of blocks */ 65 void * msg_control; /* Per protocol magic (eg BSD file descriptor passing) */ 66 __kernel_size_t msg_controllen; /* Length of cmsg list */ 67 unsigned msg_flags; 68 }; 69 70 /* 71 * POSIX 1003.1g - ancillary data object information 72 * Ancillary data consits of a sequence of pairs of 73 * (cmsghdr, cmsg_data[]) 74 */ 75 76 struct cmsghdr { 77 __kernel_size_t cmsg_len; /* data byte count, including hdr */ 78 int cmsg_level; /* originating protocol */ 79 int cmsg_type; /* protocol-specific type */ 80 }; 81 82 /* 83 * Ancilliary data object information MACROS 84 * Table 5-14 of POSIX 1003.1g 85 */ 86 87 #define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg)) 88 #define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg)) 89 90 #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) ) 91 92 #define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr)))) 93 #define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len)) 94 #define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len)) 95 96 #define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \ 97 (struct cmsghdr *)(ctl) : \ 98 (struct cmsghdr *)NULL) 99 #define CMSG_FIRSTHDR(msg) __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen) 100 #define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \ 101 (cmsg)->cmsg_len <= (unsigned long) \ 102 ((mhdr)->msg_controllen - \ 103 ((char *)(cmsg) - (char *)(mhdr)->msg_control))) 104 105 /* 106 * This mess will go away with glibc 107 */ 108 109 #ifdef __KERNEL__ 110 #define __KINLINE static inline 111 #elif defined(__GNUC__) 112 #define __KINLINE static __inline__ 113 #elif defined(__cplusplus) 114 #define __KINLINE static inline 115 #else 116 #define __KINLINE static 117 #endif 118 119 120 /* 121 * Get the next cmsg header 122 * 123 * PLEASE, do not touch this function. If you think, that it is 124 * incorrect, grep kernel sources and think about consequences 125 * before trying to improve it. 126 * 127 * Now it always returns valid, not truncated ancillary object 128 * HEADER. But caller still MUST check, that cmsg->cmsg_len is 129 * inside range, given by msg->msg_controllen before using 130 * ancillary object DATA. --ANK (980731) 131 */ 132 133 __KINLINE struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size, 134 struct cmsghdr *__cmsg) 135 { 136 struct cmsghdr * __ptr; 137 138 __ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) + CMSG_ALIGN(__cmsg->cmsg_len)); 139 if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size) 140 return (struct cmsghdr *)0; 141 142 return __ptr; 143 } 144 145 __KINLINE struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg) 146 { 147 return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg); 148 } 149 150 /* "Socket"-level control message types: */ 151 152 #define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */ 153 #define SCM_CREDENTIALS 0x02 /* rw: struct ucred */ 154 155 struct ucred { 156 __u32 pid; 157 __u32 uid; 158 __u32 gid; 159 }; 160 161 /* Supported address families. */ 162 #define AF_UNSPEC 0 163 #define AF_UNIX 1 /* Unix domain sockets */ 164 #define AF_LOCAL 1 /* POSIX name for AF_UNIX */ 165 #define AF_INET 2 /* Internet IP Protocol */ 166 #define AF_AX25 3 /* Amateur Radio AX.25 */ 167 #define AF_IPX 4 /* Novell IPX */ 168 #define AF_APPLETALK 5 /* AppleTalk DDP */ 169 #define AF_NETROM 6 /* Amateur Radio NET/ROM */ 170 #define AF_BRIDGE 7 /* Multiprotocol bridge */ 171 #define AF_ATMPVC 8 /* ATM PVCs */ 172 #define AF_X25 9 /* Reserved for X.25 project */ 173 #define AF_INET6 10 /* IP version 6 */ 174 #define AF_ROSE 11 /* Amateur Radio X.25 PLP */ 175 #define AF_DECnet 12 /* Reserved for DECnet project */ 176 #define AF_NETBEUI 13 /* Reserved for 802.2LLC project*/ 177 #define AF_SECURITY 14 /* Security callback pseudo AF */ 178 #define AF_KEY 15 /* PF_KEY key management API */ 179 #define AF_NETLINK 16 180 #define AF_ROUTE AF_NETLINK /* Alias to emulate 4.4BSD */ 181 #define AF_PACKET 17 /* Packet family */ 182 #define AF_ASH 18 /* Ash */ 183 #define AF_ECONET 19 /* Acorn Econet */ 184 #define AF_ATMSVC 20 /* ATM SVCs */ 185 #define AF_SNA 22 /* Linux SNA Project (nutters!) */ 186 #define AF_IRDA 23 /* IRDA sockets */ 187 #define AF_PPPOX 24 /* PPPoX sockets */ 188 #define AF_WANPIPE 25 /* Wanpipe API Sockets */ 189 #define AF_LLC 26 /* Linux LLC */ 190 #define AF_BLUETOOTH 31 /* Bluetooth sockets */ 191 #define AF_MAX 32 /* For now.. */ 192 193 /* Protocol families, same as address families. */ 194 #define PF_UNSPEC AF_UNSPEC 195 #define PF_UNIX AF_UNIX 196 #define PF_LOCAL AF_LOCAL 197 #define PF_INET AF_INET 198 #define PF_AX25 AF_AX25 199 #define PF_IPX AF_IPX 200 #define PF_APPLETALK AF_APPLETALK 201 #define PF_NETROM AF_NETROM 202 #define PF_BRIDGE AF_BRIDGE 203 #define PF_ATMPVC AF_ATMPVC 204 #define PF_X25 AF_X25 205 #define PF_INET6 AF_INET6 206 #define PF_ROSE AF_ROSE 207 #define PF_DECnet AF_DECnet 208 #define PF_NETBEUI AF_NETBEUI 209 #define PF_SECURITY AF_SECURITY 210 #define PF_KEY AF_KEY 211 #define PF_NETLINK AF_NETLINK 212 #define PF_ROUTE AF_ROUTE 213 #define PF_PACKET AF_PACKET 214 #define PF_ASH AF_ASH 215 #define PF_ECONET AF_ECONET 216 #define PF_ATMSVC AF_ATMSVC 217 #define PF_SNA AF_SNA 218 #define PF_IRDA AF_IRDA 219 #define PF_PPPOX AF_PPPOX 220 #define PF_WANPIPE AF_WANPIPE 221 #define PF_LLC AF_LLC 222 #define PF_BLUETOOTH AF_BLUETOOTH 223 #define PF_MAX AF_MAX 224 225 /* Maximum queue length specifiable by listen. */ 226 #define SOMAXCONN 128 227 228 /* Flags we can use with send/ and recv. 229 Added those for 1003.1g not all are supported yet 230 */ 231 232 #define MSG_OOB 1 233 #define MSG_PEEK 2 234 #define MSG_DONTROUTE 4 235 #define MSG_TRYHARD 4 /* Synonym for MSG_DONTROUTE for DECnet */ 236 #define MSG_CTRUNC 8 237 #define MSG_PROBE 0x10 /* Do not send. Only probe path f.e. for MTU */ 238 #define MSG_TRUNC 0x20 239 #define MSG_DONTWAIT 0x40 /* Nonblocking io */ 240 #define MSG_EOR 0x80 /* End of record */ 241 #define MSG_WAITALL 0x100 /* Wait for a full request */ 242 #define MSG_FIN 0x200 243 #define MSG_SYN 0x400 244 #define MSG_CONFIRM 0x800 /* Confirm path validity */ 245 #define MSG_RST 0x1000 246 #define MSG_ERRQUEUE 0x2000 /* Fetch message from error queue */ 247 #define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */ 248 #define MSG_MORE 0x8000 /* Sender will send more */ 249 250 #define MSG_EOF MSG_FIN 251 252 #if defined(CONFIG_COMPAT) 253 #define MSG_CMSG_COMPAT 0x80000000 /* This message needs 32 bit fixups */ 254 #else 255 #define MSG_CMSG_COMPAT 0 /* We never have 32 bit fixups */ 256 #endif 257 258 259 /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */ 260 #define SOL_IP 0 261 /* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */ 262 #define SOL_TCP 6 263 #define SOL_UDP 17 264 #define SOL_IPV6 41 265 #define SOL_ICMPV6 58 266 #define SOL_SCTP 132 267 #define SOL_RAW 255 268 #define SOL_IPX 256 269 #define SOL_AX25 257 270 #define SOL_ATALK 258 271 #define SOL_NETROM 259 272 #define SOL_ROSE 260 273 #define SOL_DECNET 261 274 #define SOL_X25 262 275 #define SOL_PACKET 263 276 #define SOL_ATM 264 /* ATM layer (cell level) */ 277 #define SOL_AAL 265 /* ATM Adaption Layer (packet level) */ 278 #define SOL_IRDA 266 279 #define SOL_NETBEUI 267 280 #define SOL_LLC 268 281 #define SOL_DCCP 269 282 #define SOL_NETLINK 270 283 284 /* IPX options */ 285 #define IPX_TYPE 1 286 287 #ifdef __KERNEL__ 288 extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len); 289 extern int memcpy_fromiovecend(unsigned char *kdata, struct iovec *iov, 290 int offset, int len); 291 extern int csum_partial_copy_fromiovecend(unsigned char *kdata, 292 struct iovec *iov, 293 int offset, 294 unsigned int len, int *csump); 295 296 extern int verify_iovec(struct msghdr *m, struct iovec *iov, char *address, int mode); 297 extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len); 298 extern int move_addr_to_user(void *kaddr, int klen, void __user *uaddr, int __user *ulen); 299 extern int move_addr_to_kernel(void __user *uaddr, int ulen, void *kaddr); 300 extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data); 301 302 #endif 303 #endif /* not kernel and not glibc */ 304 #endif /* _LINUX_SOCKET_H */ 305