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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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C
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#include <asm/socket.h> /* arch-dependent defines */#include <linux/sockios.h> /* the SIOCxxx I/O controls */#include <linux/uio.h> /* iovec support */#include <linux/types.h> /* pid_t */#include <linux/compiler.h> /* __user */#include <uapi/linux/socket.h>
struct file;struct pid;struct cred;struct socket;struct sock;struct sk_buff;struct proto_accept_arg;
#define __sockaddr_check_size(size) \ BUILD_BUG_ON(((size) > sizeof(struct __kernel_sockaddr_storage)))
#ifdef CONFIG_PROC_FSstruct seq_file;extern void socket_seq_show(struct seq_file *seq);#endif
typedef __kernel_sa_family_t sa_family_t;
/* * 1003.1g requires sa_family_t and that sa_data is char. */
/* Deprecated for in-kernel use. Use struct sockaddr_unsized instead. */struct sockaddr { sa_family_t sa_family; /* address family, AF_xxx */ char sa_data[14]; /* 14 bytes of protocol address */};
/** * struct sockaddr_unsized - Unspecified size sockaddr for callbacks * @sa_family: Address family (AF_UNIX, AF_INET, AF_INET6, etc.) * @sa_data: Flexible array for address data * * This structure is designed for callback interfaces where the * total size is known via the sockaddr_len parameter. Unlike struct * sockaddr which has a fixed 14-byte sa_data limit or struct * sockaddr_storage which has a fixed 128-byte sa_data limit, this * structure can accommodate addresses of any size, but must be used * carefully. */struct sockaddr_unsized { __kernel_sa_family_t sa_family; /* address family, AF_xxx */ char sa_data[]; /* flexible address data */};
struct linger { int l_onoff; /* Linger active */ int l_linger; /* How long to linger for */};
#define sockaddr_storage __kernel_sockaddr_storage
/* * As we do 4.4BSD message passing we use a 4.4BSD message passing * system, not 4.3. Thus msg_accrights(len) are now missing. They * belong in an obscure libc emulation or the bin. */
struct msghdr { void *msg_name; /* ptr to socket address structure */ int msg_namelen; /* size of socket address structure */
int msg_inq; /* output, data left in socket */
struct iov_iter msg_iter; /* data */
/* * Ancillary data. msg_control_user is the user buffer used for the * recv* side when msg_control_is_user is set, msg_control is the kernel * buffer used for all other cases. */ union { void *msg_control; void __user *msg_control_user; }; bool msg_control_is_user : 1; bool msg_get_inq : 1;/* return INQ after receive */ unsigned int msg_flags; /* flags on received message */ __kernel_size_t msg_controllen; /* ancillary data buffer length */ struct ubuf_info *msg_ubuf; int (*sg_from_iter)(struct sk_buff *skb, struct iov_iter *from, size_t length);};
struct user_msghdr { void __user *msg_name; /* ptr to socket address structure */ int msg_namelen; /* size of socket address structure */ struct iovec __user *msg_iov; /* scatter/gather array */ __kernel_size_t msg_iovlen; /* # elements in msg_iov */ void __user *msg_control; /* ancillary data */ __kernel_size_t msg_controllen; /* ancillary data buffer length */ unsigned int msg_flags; /* flags on received message */};
/* For recvmmsg/sendmmsg */struct mmsghdr { struct user_msghdr msg_hdr; unsigned int msg_len;};
/* * POSIX 1003.1g - ancillary data object information * Ancillary data consists of a sequence of pairs of * (cmsghdr, cmsg_data[]) */
struct cmsghdr { __kernel_size_t cmsg_len; /* data byte count, including hdr */ int cmsg_level; /* originating protocol */ int cmsg_type; /* protocol-specific type */};
/* * Ancillary data object information MACROS * Table 5-14 of POSIX 1003.1g */
#define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))#define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
#define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
#define CMSG_DATA(cmsg) \ ((void *)(cmsg) + sizeof(struct cmsghdr))#define CMSG_USER_DATA(cmsg) \ ((void __user *)(cmsg) + sizeof(struct cmsghdr))#define CMSG_SPACE(len) (sizeof(struct cmsghdr) + CMSG_ALIGN(len))#define CMSG_LEN(len) (sizeof(struct cmsghdr) + (len))
#define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \ (struct cmsghdr *)(ctl) : \ (struct cmsghdr *)NULL)#define CMSG_FIRSTHDR(msg) __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)#define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \ (cmsg)->cmsg_len <= (unsigned long) \ ((mhdr)->msg_controllen - \ ((char *)(cmsg) - (char *)(mhdr)->msg_control)))#define for_each_cmsghdr(cmsg, msg) \ for (cmsg = CMSG_FIRSTHDR(msg); \ cmsg; \ cmsg = CMSG_NXTHDR(msg, cmsg))
/* * Get the next cmsg header * * PLEASE, do not touch this function. If you think, that it is * incorrect, grep kernel sources and think about consequences * before trying to improve it. * * Now it always returns valid, not truncated ancillary object * HEADER. But caller still MUST check, that cmsg->cmsg_len is * inside range, given by msg->msg_controllen before using * ancillary object DATA. --ANK (980731) */
static inline struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size, struct cmsghdr *__cmsg){ struct cmsghdr * __ptr;
__ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) + CMSG_ALIGN(__cmsg->cmsg_len)); if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size) return (struct cmsghdr *)0;
return __ptr;}
static inline struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg){ return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);}
static inline size_t msg_data_left(const struct msghdr *msg){ return iov_iter_count(&msg->msg_iter);}
/* "Socket"-level control message types: */
#define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */#define SCM_CREDENTIALS 0x02 /* rw: struct ucred */#define SCM_SECURITY 0x03 /* rw: security label */#define SCM_PIDFD 0x04 /* ro: pidfd (int) */
struct ucred { __u32 pid; __u32 uid; __u32 gid;};
/* Supported address families. */#define AF_UNSPEC 0#define AF_UNIX 1 /* Unix domain sockets */#define AF_LOCAL 1 /* POSIX name for AF_UNIX */#define AF_INET 2 /* Internet IP Protocol */#define AF_AX25 3 /* Amateur Radio AX.25 */#define AF_IPX 4 /* Novell IPX */#define AF_APPLETALK 5 /* AppleTalk DDP */#define AF_NETROM 6 /* Amateur Radio NET/ROM */#define AF_BRIDGE 7 /* Multiprotocol bridge */#define AF_ATMPVC 8 /* ATM PVCs */#define AF_X25 9 /* Reserved for X.25 project */#define AF_INET6 10 /* IP version 6 */#define AF_ROSE 11 /* Amateur Radio X.25 PLP */#define AF_DECnet 12 /* Reserved for DECnet project */#define AF_NETBEUI 13 /* Reserved for 802.2LLC project*/#define AF_SECURITY 14 /* Security callback pseudo AF */#define AF_KEY 15 /* PF_KEY key management API */#define AF_NETLINK 16#define AF_ROUTE AF_NETLINK /* Alias to emulate 4.4BSD */#define AF_PACKET 17 /* Packet family */#define AF_ASH 18 /* Ash */#define AF_ECONET 19 /* Acorn Econet */#define AF_ATMSVC 20 /* ATM SVCs */#define AF_RDS 21 /* RDS sockets */#define AF_SNA 22 /* Linux SNA Project (nutters!) */#define AF_IRDA 23 /* IRDA sockets */#define AF_PPPOX 24 /* PPPoX sockets */#define AF_WANPIPE 25 /* Wanpipe API Sockets */#define AF_LLC 26 /* Linux LLC */#define AF_IB 27 /* Native InfiniBand address */#define AF_MPLS 28 /* MPLS */#define AF_CAN 29 /* Controller Area Network */#define AF_TIPC 30 /* TIPC sockets */#define AF_BLUETOOTH 31 /* Bluetooth sockets */#define AF_IUCV 32 /* IUCV sockets */#define AF_RXRPC 33 /* RxRPC sockets */#define AF_ISDN 34 /* mISDN sockets */#define AF_PHONET 35 /* Phonet sockets */#define AF_IEEE802154 36 /* IEEE802154 sockets */#define AF_CAIF 37 /* CAIF sockets */#define AF_ALG 38 /* Algorithm sockets */#define AF_NFC 39 /* NFC sockets */#define AF_VSOCK 40 /* vSockets */#define AF_KCM 41 /* Kernel Connection Multiplexor*/#define AF_QIPCRTR 42 /* Qualcomm IPC Router */#define AF_SMC 43 /* smc sockets: reserve number for * PF_SMC protocol family that * reuses AF_INET address family */#define AF_XDP 44 /* XDP sockets */#define AF_MCTP 45 /* Management component * transport protocol */
#define AF_MAX 46 /* For now.. */
/* Protocol families, same as address families. */#define PF_UNSPEC AF_UNSPEC#define PF_UNIX AF_UNIX#define PF_LOCAL AF_LOCAL#define PF_INET AF_INET#define PF_AX25 AF_AX25#define PF_IPX AF_IPX#define PF_APPLETALK AF_APPLETALK#define PF_NETROM AF_NETROM#define PF_BRIDGE AF_BRIDGE#define PF_ATMPVC AF_ATMPVC#define PF_X25 AF_X25#define PF_INET6 AF_INET6#define PF_ROSE AF_ROSE#define PF_DECnet AF_DECnet#define PF_NETBEUI AF_NETBEUI#define PF_SECURITY AF_SECURITY#define PF_KEY AF_KEY#define PF_NETLINK AF_NETLINK#define PF_ROUTE AF_ROUTE#define PF_PACKET AF_PACKET#define PF_ASH AF_ASH#define PF_ECONET AF_ECONET#define PF_ATMSVC AF_ATMSVC#define PF_RDS AF_RDS#define PF_SNA AF_SNA#define PF_IRDA AF_IRDA#define PF_PPPOX AF_PPPOX#define PF_WANPIPE AF_WANPIPE#define PF_LLC AF_LLC#define PF_IB AF_IB#define PF_MPLS AF_MPLS#define PF_CAN AF_CAN#define PF_TIPC AF_TIPC#define PF_BLUETOOTH AF_BLUETOOTH#define PF_IUCV AF_IUCV#define PF_RXRPC AF_RXRPC#define PF_ISDN AF_ISDN#define PF_PHONET AF_PHONET#define PF_IEEE802154 AF_IEEE802154#define PF_CAIF AF_CAIF#define PF_ALG AF_ALG#define PF_NFC AF_NFC#define PF_VSOCK AF_VSOCK#define PF_KCM AF_KCM#define PF_QIPCRTR AF_QIPCRTR#define PF_SMC AF_SMC#define PF_XDP AF_XDP#define PF_MCTP AF_MCTP#define PF_MAX AF_MAX
/* Maximum queue length specifiable by listen. */#define SOMAXCONN 4096
/* Flags we can use with send/ and recv. Added those for 1003.1g not all are supported yet */
#define MSG_OOB 1#define MSG_PEEK 2#define MSG_DONTROUTE 4#define MSG_TRYHARD 4 /* Synonym for MSG_DONTROUTE for DECnet */#define MSG_CTRUNC 8#define MSG_PROBE 0x10 /* Do not send. Only probe path f.e. for MTU */#define MSG_TRUNC 0x20#define MSG_DONTWAIT 0x40 /* Nonblocking io */#define MSG_EOR 0x80 /* End of record */#define MSG_WAITALL 0x100 /* Wait for a full request */#define MSG_FIN 0x200#define MSG_SYN 0x400#define MSG_CONFIRM 0x800 /* Confirm path validity */#define MSG_RST 0x1000#define MSG_ERRQUEUE 0x2000 /* Fetch message from error queue */#define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */#define MSG_MORE 0x8000 /* Sender will send more */#define MSG_WAITFORONE 0x10000 /* recvmmsg(): block until 1+ packets avail */#define MSG_SENDPAGE_NOPOLICY 0x10000 /* sendpage() internal : do no apply policy */#define MSG_BATCH 0x40000 /* sendmmsg(): more messages coming */#define MSG_EOF MSG_FIN#define MSG_NO_SHARED_FRAGS 0x80000 /* sendpage() internal : page frags are not shared */#define MSG_SENDPAGE_DECRYPTED 0x100000 /* sendpage() internal : page may carry * plain text and require encryption */
#define MSG_SOCK_DEVMEM 0x2000000 /* Receive devmem skbs as cmsg */#define MSG_ZEROCOPY 0x4000000 /* Use user data in kernel path */#define MSG_SPLICE_PAGES 0x8000000 /* Splice the pages from the iterator in sendmsg() */#define MSG_FASTOPEN 0x20000000 /* Send data in TCP SYN */#define MSG_CMSG_CLOEXEC 0x40000000 /* Set close_on_exec for file descriptor received through SCM_RIGHTS */#if defined(CONFIG_COMPAT)#define MSG_CMSG_COMPAT 0x80000000 /* This message needs 32 bit fixups */#else#define MSG_CMSG_COMPAT 0 /* We never have 32 bit fixups */#endif
/* Flags to be cleared on entry by sendmsg and sendmmsg syscalls */#define MSG_INTERNAL_SENDMSG_FLAGS \ (MSG_SPLICE_PAGES | MSG_SENDPAGE_NOPOLICY | MSG_SENDPAGE_DECRYPTED | MSG_NO_SHARED_FRAGS)
/* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */#define SOL_IP 0/* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */#define SOL_TCP 6#define SOL_UDP 17#define SOL_IPV6 41#define SOL_ICMPV6 58#define SOL_SCTP 132#define SOL_UDPLITE 136 /* UDP-Lite (RFC 3828) */#define SOL_RAW 255#define SOL_IPX 256#define SOL_AX25 257#define SOL_ATALK 258#define SOL_NETROM 259#define SOL_ROSE 260#define SOL_DECNET 261#define SOL_X25 262#define SOL_PACKET 263#define SOL_ATM 264 /* ATM layer (cell level) */#define SOL_AAL 265 /* ATM Adaption Layer (packet level) */#define SOL_IRDA 266#define SOL_NETBEUI 267#define SOL_LLC 268#define SOL_DCCP 269#define SOL_NETLINK 270#define SOL_TIPC 271#define SOL_RXRPC 272#define SOL_PPPOL2TP 273#define SOL_BLUETOOTH 274#define SOL_PNPIPE 275#define SOL_RDS 276#define SOL_IUCV 277#define SOL_CAIF 278#define SOL_ALG 279#define SOL_NFC 280#define SOL_KCM 281#define SOL_TLS 282#define SOL_XDP 283#define SOL_MPTCP 284#define SOL_MCTP 285#define SOL_SMC 286#define SOL_VSOCK 287
/* IPX options */#define IPX_TYPE 1
extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr);extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);extern int put_cmsg_notrunc(struct msghdr *msg, int level, int type, int len, void *data);
struct timespec64;struct __kernel_timespec;struct old_timespec32;
struct scm_timestamping_internal { ktime_t ts[3];};
extern void put_cmsg_scm_timestamping64(struct msghdr *msg, struct scm_timestamping_internal *tss);extern void put_cmsg_scm_timestamping(struct msghdr *msg, struct scm_timestamping_internal *tss);
/* The __sys_...msg variants allow MSG_CMSG_COMPAT iff * forbid_cmsg_compat==false */extern long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned int flags, bool forbid_cmsg_compat);extern long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned int flags, bool forbid_cmsg_compat);extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, unsigned int flags, struct __kernel_timespec __user *timeout, struct old_timespec32 __user *timeout32);extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, unsigned int flags, bool forbid_cmsg_compat);extern long __sys_sendmsg_sock(struct socket *sock, struct msghdr *msg, unsigned int flags);extern long __sys_recvmsg_sock(struct socket *sock, struct msghdr *msg, struct user_msghdr __user *umsg, struct sockaddr __user *uaddr, unsigned int flags);extern int __copy_msghdr(struct msghdr *kmsg, struct user_msghdr *umsg, struct sockaddr __user **save_addr);
/* helpers which do the actual work for syscalls */extern int __sys_recvfrom(int fd, void __user *ubuf, size_t size, unsigned int flags, struct sockaddr __user *addr, int __user *addr_len);extern int __sys_sendto(int fd, void __user *buff, size_t len, unsigned int flags, struct sockaddr __user *addr, int addr_len);extern struct file *do_accept(struct file *file, struct proto_accept_arg *arg, struct sockaddr __user *upeer_sockaddr, int __user *upeer_addrlen, int flags);extern int __sys_accept4(int fd, struct sockaddr __user *upeer_sockaddr, int __user *upeer_addrlen, int flags);extern int __sys_socket(int family, int type, int protocol);extern struct file *__sys_socket_file(int family, int type, int protocol);extern int __sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen);extern int __sys_bind_socket(struct socket *sock, struct sockaddr_storage *address, int addrlen);int connect_socket(struct socket *sock, struct sockaddr_storage *addr, int addrlen, int flags);extern int __sys_connect_file(struct file *file, struct sockaddr_storage *addr, int addrlen, int file_flags);extern int __sys_connect(int fd, struct sockaddr __user *uservaddr, int addrlen);extern int __sys_listen(int fd, int backlog);extern int __sys_listen_socket(struct socket *sock, int backlog);extern int do_getsockname(struct socket *sock, int peer, struct sockaddr __user *usockaddr, int __user *usockaddr_len);extern int __sys_getsockname(int fd, struct sockaddr __user *usockaddr, int __user *usockaddr_len, int peer);extern int __sys_socketpair(int family, int type, int protocol, int __user *usockvec);extern int __sys_shutdown_sock(struct socket *sock, int how);extern int __sys_shutdown(int fd, int how);#endif /* _LINUX_SOCKET_H */