429 lines
14 KiB
C
429 lines
14 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_SOCKET_H
|
|
#define _LINUX_SOCKET_H
|
|
|
|
|
|
#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 pid;
|
|
struct cred;
|
|
struct socket;
|
|
|
|
#define __sockaddr_check_size(size) \
|
|
BUILD_BUG_ON(((size) > sizeof(struct __kernel_sockaddr_storage)))
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
struct 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.
|
|
*/
|
|
|
|
struct sockaddr {
|
|
sa_family_t sa_family; /* address family, AF_xxx */
|
|
char sa_data[14]; /* 14 bytes of protocol address */
|
|
};
|
|
|
|
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 */
|
|
struct iov_iter msg_iter; /* data */
|
|
void *msg_control; /* ancillary data */
|
|
__kernel_size_t msg_controllen; /* ancillary data buffer length */
|
|
unsigned int msg_flags; /* flags on received message */
|
|
struct kiocb *msg_iocb; /* ptr to iocb for async requests */
|
|
};
|
|
|
|
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 consits 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 *)((char *)(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(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 */
|
|
|
|
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_MAX 45 /* 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_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_SENDPAGE_NOTLAST 0x20000 /* sendpage() internal : not the last page */
|
|
#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_ZEROCOPY 0x4000000 /* Use user data in kernel path */
|
|
#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
|
|
|
|
|
|
/* 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
|
|
|
|
/* 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);
|
|
|
|
struct timespec64;
|
|
struct __kernel_timespec;
|
|
struct old_timespec32;
|
|
|
|
struct scm_timestamping_internal {
|
|
struct timespec64 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 sendmsg_copy_msghdr(struct msghdr *msg,
|
|
struct user_msghdr __user *umsg, unsigned flags,
|
|
struct iovec **iov);
|
|
extern int recvmsg_copy_msghdr(struct msghdr *msg,
|
|
struct user_msghdr __user *umsg, unsigned flags,
|
|
struct sockaddr __user **uaddr,
|
|
struct iovec **iov);
|
|
extern int __copy_msghdr_from_user(struct msghdr *kmsg,
|
|
struct user_msghdr __user *umsg,
|
|
struct sockaddr __user **save_addr,
|
|
struct iovec __user **uiov, size_t *nsegs);
|
|
|
|
/* 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 int __sys_accept4_file(struct file *file, unsigned file_flags,
|
|
struct sockaddr __user *upeer_sockaddr,
|
|
int __user *upeer_addrlen, int flags,
|
|
unsigned long nofile);
|
|
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 int __sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen);
|
|
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_getsockname(int fd, struct sockaddr __user *usockaddr,
|
|
int __user *usockaddr_len);
|
|
extern int __sys_getpeername(int fd, struct sockaddr __user *usockaddr,
|
|
int __user *usockaddr_len);
|
|
extern int __sys_socketpair(int family, int type, int protocol,
|
|
int __user *usockvec);
|
|
extern int __sys_shutdown(int fd, int how);
|
|
|
|
extern struct ns_common *get_net_ns(struct ns_common *ns);
|
|
#endif /* _LINUX_SOCKET_H */
|