1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */
21da177e4SLinus Torvalds #ifndef _LINUX_SOCKET_H
31da177e4SLinus Torvalds #define _LINUX_SOCKET_H
41da177e4SLinus Torvalds
51da177e4SLinus Torvalds
61da177e4SLinus Torvalds #include <asm/socket.h> /* arch-dependent defines */
71da177e4SLinus Torvalds #include <linux/sockios.h> /* the SIOCxxx I/O controls */
81da177e4SLinus Torvalds #include <linux/uio.h> /* iovec support */
91da177e4SLinus Torvalds #include <linux/types.h> /* pid_t */
101da177e4SLinus Torvalds #include <linux/compiler.h> /* __user */
11607ca46eSDavid Howells #include <uapi/linux/socket.h>
121da177e4SLinus Torvalds
137999096fSHerbert Xu struct file;
143f551f94SEric W. Biederman struct pid;
153f551f94SEric W. Biederman struct cred;
160fa03c62SJens Axboe struct socket;
17ebe73a28SDavid Ahern struct sock;
18ebe73a28SDavid Ahern struct sk_buff;
19*0645fbe7SJens Axboe struct proto_accept_arg;
203f551f94SEric W. Biederman
2138bfd8f5SCyrill Gorcunov #define __sockaddr_check_size(size) \
2238bfd8f5SCyrill Gorcunov BUILD_BUG_ON(((size) > sizeof(struct __kernel_sockaddr_storage)))
2338bfd8f5SCyrill Gorcunov
2420380731SArnaldo Carvalho de Melo #ifdef CONFIG_PROC_FS
2520380731SArnaldo Carvalho de Melo struct seq_file;
2620380731SArnaldo Carvalho de Melo extern void socket_seq_show(struct seq_file *seq);
2720380731SArnaldo Carvalho de Melo #endif
2820380731SArnaldo Carvalho de Melo
296602a4baSDavid S. Miller typedef __kernel_sa_family_t sa_family_t;
301da177e4SLinus Torvalds
311da177e4SLinus Torvalds /*
321da177e4SLinus Torvalds * 1003.1g requires sa_family_t and that sa_data is char.
331da177e4SLinus Torvalds */
341da177e4SLinus Torvalds
351da177e4SLinus Torvalds struct sockaddr {
361da177e4SLinus Torvalds sa_family_t sa_family; /* address family, AF_xxx */
37b5f0de6dSKees Cook union {
38b5f0de6dSKees Cook char sa_data_min[14]; /* Minimum 14 bytes of protocol address */
39b5f0de6dSKees Cook DECLARE_FLEX_ARRAY(char, sa_data);
40b5f0de6dSKees Cook };
411da177e4SLinus Torvalds };
421da177e4SLinus Torvalds
431da177e4SLinus Torvalds struct linger {
441da177e4SLinus Torvalds int l_onoff; /* Linger active */
451da177e4SLinus Torvalds int l_linger; /* How long to linger for */
461da177e4SLinus Torvalds };
471da177e4SLinus Torvalds
481da177e4SLinus Torvalds #define sockaddr_storage __kernel_sockaddr_storage
491da177e4SLinus Torvalds
501da177e4SLinus Torvalds /*
511da177e4SLinus Torvalds * As we do 4.4BSD message passing we use a 4.4BSD message passing
521da177e4SLinus Torvalds * system, not 4.3. Thus msg_accrights(len) are now missing. They
531da177e4SLinus Torvalds * belong in an obscure libc emulation or the bin.
541da177e4SLinus Torvalds */
551da177e4SLinus Torvalds
561da177e4SLinus Torvalds struct msghdr {
57eb97768aSFX Le Bail void *msg_name; /* ptr to socket address structure */
58eb97768aSFX Le Bail int msg_namelen; /* size of socket address structure */
59f94fd25cSJens Axboe
60f94fd25cSJens Axboe int msg_inq; /* output, data left in socket */
61f94fd25cSJens Axboe
62c0371da6SAl Viro struct iov_iter msg_iter; /* data */
631f466e1fSChristoph Hellwig
641f466e1fSChristoph Hellwig /*
651f466e1fSChristoph Hellwig * Ancillary data. msg_control_user is the user buffer used for the
661f466e1fSChristoph Hellwig * recv* side when msg_control_is_user is set, msg_control is the kernel
671f466e1fSChristoph Hellwig * buffer used for all other cases.
681f466e1fSChristoph Hellwig */
691f466e1fSChristoph Hellwig union {
701f466e1fSChristoph Hellwig void *msg_control;
711f466e1fSChristoph Hellwig void __user *msg_control_user;
721f466e1fSChristoph Hellwig };
731f466e1fSChristoph Hellwig bool msg_control_is_user : 1;
74f94fd25cSJens Axboe bool msg_get_inq : 1;/* return INQ after receive */
75eb97768aSFX Le Bail unsigned int msg_flags; /* flags on received message */
76f94fd25cSJens Axboe __kernel_size_t msg_controllen; /* ancillary data buffer length */
770345f931Stadeusz.struk@intel.com struct kiocb *msg_iocb; /* ptr to iocb for async requests */
787c701d92SPavel Begunkov struct ubuf_info *msg_ubuf;
79ebe73a28SDavid Ahern int (*sg_from_iter)(struct sock *sk, struct sk_buff *skb,
80ebe73a28SDavid Ahern struct iov_iter *from, size_t length);
811da177e4SLinus Torvalds };
821da177e4SLinus Torvalds
83666547ffSAl Viro struct user_msghdr {
84666547ffSAl Viro void __user *msg_name; /* ptr to socket address structure */
85666547ffSAl Viro int msg_namelen; /* size of socket address structure */
86666547ffSAl Viro struct iovec __user *msg_iov; /* scatter/gather array */
87666547ffSAl Viro __kernel_size_t msg_iovlen; /* # elements in msg_iov */
88666547ffSAl Viro void __user *msg_control; /* ancillary data */
89666547ffSAl Viro __kernel_size_t msg_controllen; /* ancillary data buffer length */
90666547ffSAl Viro unsigned int msg_flags; /* flags on received message */
91666547ffSAl Viro };
92666547ffSAl Viro
93a2e27255SArnaldo Carvalho de Melo /* For recvmmsg/sendmmsg */
94a2e27255SArnaldo Carvalho de Melo struct mmsghdr {
95666547ffSAl Viro struct user_msghdr msg_hdr;
9695c96174SEric Dumazet unsigned int msg_len;
97a2e27255SArnaldo Carvalho de Melo };
98a2e27255SArnaldo Carvalho de Melo
991da177e4SLinus Torvalds /*
1001da177e4SLinus Torvalds * POSIX 1003.1g - ancillary data object information
10163fa73e2SArnaldo Carvalho de Melo * Ancillary data consists of a sequence of pairs of
1021da177e4SLinus Torvalds * (cmsghdr, cmsg_data[])
1031da177e4SLinus Torvalds */
1041da177e4SLinus Torvalds
1051da177e4SLinus Torvalds struct cmsghdr {
1061da177e4SLinus Torvalds __kernel_size_t cmsg_len; /* data byte count, including hdr */
1071da177e4SLinus Torvalds int cmsg_level; /* originating protocol */
1081da177e4SLinus Torvalds int cmsg_type; /* protocol-specific type */
1091da177e4SLinus Torvalds };
1101da177e4SLinus Torvalds
1111da177e4SLinus Torvalds /*
11225985edcSLucas De Marchi * Ancillary data object information MACROS
1131da177e4SLinus Torvalds * Table 5-14 of POSIX 1003.1g
1141da177e4SLinus Torvalds */
1151da177e4SLinus Torvalds
1161da177e4SLinus Torvalds #define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
1171da177e4SLinus Torvalds #define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
1181da177e4SLinus Torvalds
1191da177e4SLinus Torvalds #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
1201da177e4SLinus Torvalds
1210462b6bdSChristoph Hellwig #define CMSG_DATA(cmsg) \
1220462b6bdSChristoph Hellwig ((void *)(cmsg) + sizeof(struct cmsghdr))
1230462b6bdSChristoph Hellwig #define CMSG_USER_DATA(cmsg) \
1240462b6bdSChristoph Hellwig ((void __user *)(cmsg) + sizeof(struct cmsghdr))
1251ff8cebfSyuan linyu #define CMSG_SPACE(len) (sizeof(struct cmsghdr) + CMSG_ALIGN(len))
1261ff8cebfSyuan linyu #define CMSG_LEN(len) (sizeof(struct cmsghdr) + (len))
1271da177e4SLinus Torvalds
1281da177e4SLinus Torvalds #define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
1291da177e4SLinus Torvalds (struct cmsghdr *)(ctl) : \
1301da177e4SLinus Torvalds (struct cmsghdr *)NULL)
1311da177e4SLinus Torvalds #define CMSG_FIRSTHDR(msg) __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
1321da177e4SLinus Torvalds #define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \
1331da177e4SLinus Torvalds (cmsg)->cmsg_len <= (unsigned long) \
1341da177e4SLinus Torvalds ((mhdr)->msg_controllen - \
1351da177e4SLinus Torvalds ((char *)(cmsg) - (char *)(mhdr)->msg_control)))
136f95b414eSGu Zheng #define for_each_cmsghdr(cmsg, msg) \
137f95b414eSGu Zheng for (cmsg = CMSG_FIRSTHDR(msg); \
138f95b414eSGu Zheng cmsg; \
139f95b414eSGu Zheng cmsg = CMSG_NXTHDR(msg, cmsg))
1401da177e4SLinus Torvalds
1411da177e4SLinus Torvalds /*
1421da177e4SLinus Torvalds * Get the next cmsg header
1431da177e4SLinus Torvalds *
1441da177e4SLinus Torvalds * PLEASE, do not touch this function. If you think, that it is
1451da177e4SLinus Torvalds * incorrect, grep kernel sources and think about consequences
1461da177e4SLinus Torvalds * before trying to improve it.
1471da177e4SLinus Torvalds *
1481da177e4SLinus Torvalds * Now it always returns valid, not truncated ancillary object
1491da177e4SLinus Torvalds * HEADER. But caller still MUST check, that cmsg->cmsg_len is
1501da177e4SLinus Torvalds * inside range, given by msg->msg_controllen before using
1511da177e4SLinus Torvalds * ancillary object DATA. --ANK (980731)
1521da177e4SLinus Torvalds */
1531da177e4SLinus Torvalds
__cmsg_nxthdr(void * __ctl,__kernel_size_t __size,struct cmsghdr * __cmsg)1549c501935SBen Hutchings static inline struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size,
1551da177e4SLinus Torvalds struct cmsghdr *__cmsg)
1561da177e4SLinus Torvalds {
1571da177e4SLinus Torvalds struct cmsghdr * __ptr;
1581da177e4SLinus Torvalds
1591da177e4SLinus Torvalds __ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) + CMSG_ALIGN(__cmsg->cmsg_len));
1601da177e4SLinus Torvalds if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size)
1611da177e4SLinus Torvalds return (struct cmsghdr *)0;
1621da177e4SLinus Torvalds
1631da177e4SLinus Torvalds return __ptr;
1641da177e4SLinus Torvalds }
1651da177e4SLinus Torvalds
cmsg_nxthdr(struct msghdr * __msg,struct cmsghdr * __cmsg)1669c501935SBen Hutchings static inline struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg)
1671da177e4SLinus Torvalds {
1681da177e4SLinus Torvalds return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
1691da177e4SLinus Torvalds }
1701da177e4SLinus Torvalds
msg_data_left(struct msghdr * msg)17101e97e65SAl Viro static inline size_t msg_data_left(struct msghdr *msg)
17201e97e65SAl Viro {
17301e97e65SAl Viro return iov_iter_count(&msg->msg_iter);
17401e97e65SAl Viro }
17501e97e65SAl Viro
1761da177e4SLinus Torvalds /* "Socket"-level control message types: */
1771da177e4SLinus Torvalds
1781da177e4SLinus Torvalds #define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */
1791da177e4SLinus Torvalds #define SCM_CREDENTIALS 0x02 /* rw: struct ucred */
1802c7946a7SCatherine Zhang #define SCM_SECURITY 0x03 /* rw: security label */
1815e2ff670SAlexander Mikhalitsyn #define SCM_PIDFD 0x04 /* ro: pidfd (int) */
1821da177e4SLinus Torvalds
1831da177e4SLinus Torvalds struct ucred {
1841da177e4SLinus Torvalds __u32 pid;
1851da177e4SLinus Torvalds __u32 uid;
1861da177e4SLinus Torvalds __u32 gid;
1871da177e4SLinus Torvalds };
1881da177e4SLinus Torvalds
1891da177e4SLinus Torvalds /* Supported address families. */
1901da177e4SLinus Torvalds #define AF_UNSPEC 0
1911da177e4SLinus Torvalds #define AF_UNIX 1 /* Unix domain sockets */
1921da177e4SLinus Torvalds #define AF_LOCAL 1 /* POSIX name for AF_UNIX */
1931da177e4SLinus Torvalds #define AF_INET 2 /* Internet IP Protocol */
1941da177e4SLinus Torvalds #define AF_AX25 3 /* Amateur Radio AX.25 */
1951da177e4SLinus Torvalds #define AF_IPX 4 /* Novell IPX */
1961da177e4SLinus Torvalds #define AF_APPLETALK 5 /* AppleTalk DDP */
1971da177e4SLinus Torvalds #define AF_NETROM 6 /* Amateur Radio NET/ROM */
1981da177e4SLinus Torvalds #define AF_BRIDGE 7 /* Multiprotocol bridge */
1991da177e4SLinus Torvalds #define AF_ATMPVC 8 /* ATM PVCs */
2001da177e4SLinus Torvalds #define AF_X25 9 /* Reserved for X.25 project */
2011da177e4SLinus Torvalds #define AF_INET6 10 /* IP version 6 */
2021da177e4SLinus Torvalds #define AF_ROSE 11 /* Amateur Radio X.25 PLP */
2031da177e4SLinus Torvalds #define AF_DECnet 12 /* Reserved for DECnet project */
2041da177e4SLinus Torvalds #define AF_NETBEUI 13 /* Reserved for 802.2LLC project*/
2051da177e4SLinus Torvalds #define AF_SECURITY 14 /* Security callback pseudo AF */
2061da177e4SLinus Torvalds #define AF_KEY 15 /* PF_KEY key management API */
2071da177e4SLinus Torvalds #define AF_NETLINK 16
2081da177e4SLinus Torvalds #define AF_ROUTE AF_NETLINK /* Alias to emulate 4.4BSD */
2091da177e4SLinus Torvalds #define AF_PACKET 17 /* Packet family */
2101da177e4SLinus Torvalds #define AF_ASH 18 /* Ash */
2111da177e4SLinus Torvalds #define AF_ECONET 19 /* Acorn Econet */
2121da177e4SLinus Torvalds #define AF_ATMSVC 20 /* ATM SVCs */
2138a7c4c77SAndy Grover #define AF_RDS 21 /* RDS sockets */
2141da177e4SLinus Torvalds #define AF_SNA 22 /* Linux SNA Project (nutters!) */
2151da177e4SLinus Torvalds #define AF_IRDA 23 /* IRDA sockets */
2161da177e4SLinus Torvalds #define AF_PPPOX 24 /* PPPoX sockets */
2171da177e4SLinus Torvalds #define AF_WANPIPE 25 /* Wanpipe API Sockets */
2181da177e4SLinus Torvalds #define AF_LLC 26 /* Linux LLC */
2198d36eb01SSean Hefty #define AF_IB 27 /* Native InfiniBand address */
2200189197fSEric W. Biederman #define AF_MPLS 28 /* MPLS */
221cd05acfeSOliver Hartkopp #define AF_CAN 29 /* Controller Area Network */
222b97bf3fdSPer Liden #define AF_TIPC 30 /* TIPC sockets */
2231da177e4SLinus Torvalds #define AF_BLUETOOTH 31 /* Bluetooth sockets */
224eac3731bSJennifer Hunt #define AF_IUCV 32 /* IUCV sockets */
22517926a79SDavid Howells #define AF_RXRPC 33 /* RxRPC sockets */
22604578dd3SKarsten Keil #define AF_ISDN 34 /* mISDN sockets */
227bce7b154SRemi Denis-Courmont #define AF_PHONET 35 /* Phonet sockets */
228fcb94e42SSergey Lapin #define AF_IEEE802154 36 /* IEEE802154 sockets */
22970596b61SSjur Braendeland #define AF_CAIF 37 /* CAIF sockets */
230c2f9bff5SHerbert Xu #define AF_ALG 38 /* Algorithm sockets */
231c7fe3b52SAloisio Almeida Jr #define AF_NFC 39 /* NFC sockets */
232d021c344SAndy King #define AF_VSOCK 40 /* vSockets */
233ab7ac4ebSTom Herbert #define AF_KCM 41 /* Kernel Connection Multiplexor*/
234bdabad3eSCourtney Cavin #define AF_QIPCRTR 42 /* Qualcomm IPC Router */
235ac713874SUrsula Braun #define AF_SMC 43 /* smc sockets: reserve number for
236ac713874SUrsula Braun * PF_SMC protocol family that
237ac713874SUrsula Braun * reuses AF_INET address family
238ac713874SUrsula Braun */
23968e8b849SBjörn Töpel #define AF_XDP 44 /* XDP sockets */
240bc49d816SJeremy Kerr #define AF_MCTP 45 /* Management component
241bc49d816SJeremy Kerr * transport protocol
242bc49d816SJeremy Kerr */
243ab7ac4ebSTom Herbert
244bc49d816SJeremy Kerr #define AF_MAX 46 /* For now.. */
2451da177e4SLinus Torvalds
2461da177e4SLinus Torvalds /* Protocol families, same as address families. */
2471da177e4SLinus Torvalds #define PF_UNSPEC AF_UNSPEC
2481da177e4SLinus Torvalds #define PF_UNIX AF_UNIX
2491da177e4SLinus Torvalds #define PF_LOCAL AF_LOCAL
2501da177e4SLinus Torvalds #define PF_INET AF_INET
2511da177e4SLinus Torvalds #define PF_AX25 AF_AX25
2521da177e4SLinus Torvalds #define PF_IPX AF_IPX
2531da177e4SLinus Torvalds #define PF_APPLETALK AF_APPLETALK
2541da177e4SLinus Torvalds #define PF_NETROM AF_NETROM
2551da177e4SLinus Torvalds #define PF_BRIDGE AF_BRIDGE
2561da177e4SLinus Torvalds #define PF_ATMPVC AF_ATMPVC
2571da177e4SLinus Torvalds #define PF_X25 AF_X25
2581da177e4SLinus Torvalds #define PF_INET6 AF_INET6
2591da177e4SLinus Torvalds #define PF_ROSE AF_ROSE
2601da177e4SLinus Torvalds #define PF_DECnet AF_DECnet
2611da177e4SLinus Torvalds #define PF_NETBEUI AF_NETBEUI
2621da177e4SLinus Torvalds #define PF_SECURITY AF_SECURITY
2631da177e4SLinus Torvalds #define PF_KEY AF_KEY
2641da177e4SLinus Torvalds #define PF_NETLINK AF_NETLINK
2651da177e4SLinus Torvalds #define PF_ROUTE AF_ROUTE
2661da177e4SLinus Torvalds #define PF_PACKET AF_PACKET
2671da177e4SLinus Torvalds #define PF_ASH AF_ASH
2681da177e4SLinus Torvalds #define PF_ECONET AF_ECONET
2691da177e4SLinus Torvalds #define PF_ATMSVC AF_ATMSVC
2708a7c4c77SAndy Grover #define PF_RDS AF_RDS
2711da177e4SLinus Torvalds #define PF_SNA AF_SNA
2721da177e4SLinus Torvalds #define PF_IRDA AF_IRDA
2731da177e4SLinus Torvalds #define PF_PPPOX AF_PPPOX
2741da177e4SLinus Torvalds #define PF_WANPIPE AF_WANPIPE
2751da177e4SLinus Torvalds #define PF_LLC AF_LLC
2768d36eb01SSean Hefty #define PF_IB AF_IB
2770189197fSEric W. Biederman #define PF_MPLS AF_MPLS
278cd05acfeSOliver Hartkopp #define PF_CAN AF_CAN
279b97bf3fdSPer Liden #define PF_TIPC AF_TIPC
2801da177e4SLinus Torvalds #define PF_BLUETOOTH AF_BLUETOOTH
281eac3731bSJennifer Hunt #define PF_IUCV AF_IUCV
28217926a79SDavid Howells #define PF_RXRPC AF_RXRPC
28304578dd3SKarsten Keil #define PF_ISDN AF_ISDN
284bce7b154SRemi Denis-Courmont #define PF_PHONET AF_PHONET
285fcb94e42SSergey Lapin #define PF_IEEE802154 AF_IEEE802154
28670596b61SSjur Braendeland #define PF_CAIF AF_CAIF
287c2f9bff5SHerbert Xu #define PF_ALG AF_ALG
288c7fe3b52SAloisio Almeida Jr #define PF_NFC AF_NFC
289d021c344SAndy King #define PF_VSOCK AF_VSOCK
290ab7ac4ebSTom Herbert #define PF_KCM AF_KCM
291bdabad3eSCourtney Cavin #define PF_QIPCRTR AF_QIPCRTR
292ac713874SUrsula Braun #define PF_SMC AF_SMC
29368e8b849SBjörn Töpel #define PF_XDP AF_XDP
294bc49d816SJeremy Kerr #define PF_MCTP AF_MCTP
2951da177e4SLinus Torvalds #define PF_MAX AF_MAX
2961da177e4SLinus Torvalds
2971da177e4SLinus Torvalds /* Maximum queue length specifiable by listen. */
29819f92a03SEric Dumazet #define SOMAXCONN 4096
2991da177e4SLinus Torvalds
3001da177e4SLinus Torvalds /* Flags we can use with send/ and recv.
3011da177e4SLinus Torvalds Added those for 1003.1g not all are supported yet
3021da177e4SLinus Torvalds */
3031da177e4SLinus Torvalds
30401035bccSDavid S. Miller #define MSG_OOB 1
30501035bccSDavid S. Miller #define MSG_PEEK 2
30601035bccSDavid S. Miller #define MSG_DONTROUTE 4
30701035bccSDavid S. Miller #define MSG_TRYHARD 4 /* Synonym for MSG_DONTROUTE for DECnet */
30801035bccSDavid S. Miller #define MSG_CTRUNC 8
30901035bccSDavid S. Miller #define MSG_PROBE 0x10 /* Do not send. Only probe path f.e. for MTU */
31001035bccSDavid S. Miller #define MSG_TRUNC 0x20
31101035bccSDavid S. Miller #define MSG_DONTWAIT 0x40 /* Nonblocking io */
31201035bccSDavid S. Miller #define MSG_EOR 0x80 /* End of record */
31301035bccSDavid S. Miller #define MSG_WAITALL 0x100 /* Wait for a full request */
31401035bccSDavid S. Miller #define MSG_FIN 0x200
31501035bccSDavid S. Miller #define MSG_SYN 0x400
31601035bccSDavid S. Miller #define MSG_CONFIRM 0x800 /* Confirm path validity */
31701035bccSDavid S. Miller #define MSG_RST 0x1000
31801035bccSDavid S. Miller #define MSG_ERRQUEUE 0x2000 /* Fetch message from error queue */
31901035bccSDavid S. Miller #define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */
32001035bccSDavid S. Miller #define MSG_MORE 0x8000 /* Sender will send more */
32101035bccSDavid S. Miller #define MSG_WAITFORONE 0x10000 /* recvmmsg(): block until 1+ packets avail */
32201035bccSDavid S. Miller #define MSG_SENDPAGE_NOPOLICY 0x10000 /* sendpage() internal : do no apply policy */
32301035bccSDavid S. Miller #define MSG_BATCH 0x40000 /* sendmmsg(): more messages coming */
3241da177e4SLinus Torvalds #define MSG_EOF MSG_FIN
32501035bccSDavid S. Miller #define MSG_NO_SHARED_FRAGS 0x80000 /* sendpage() internal : page frags are not shared */
32601035bccSDavid S. Miller #define MSG_SENDPAGE_DECRYPTED 0x100000 /* sendpage() internal : page may carry
32741477662SJakub Kicinski * plain text and require encryption
32841477662SJakub Kicinski */
3291da177e4SLinus Torvalds
33001035bccSDavid S. Miller #define MSG_ZEROCOPY 0x4000000 /* Use user data in kernel path */
331b841b901SDavid Howells #define MSG_SPLICE_PAGES 0x8000000 /* Splice the pages from the iterator in sendmsg() */
33201035bccSDavid S. Miller #define MSG_FASTOPEN 0x20000000 /* Send data in TCP SYN */
33301035bccSDavid S. Miller #define MSG_CMSG_CLOEXEC 0x40000000 /* Set close_on_exec for file
33401035bccSDavid S. Miller descriptor received through
33501035bccSDavid S. Miller SCM_RIGHTS */
3361da177e4SLinus Torvalds #if defined(CONFIG_COMPAT)
33701035bccSDavid S. Miller #define MSG_CMSG_COMPAT 0x80000000 /* This message needs 32 bit fixups */
3381da177e4SLinus Torvalds #else
3391da177e4SLinus Torvalds #define MSG_CMSG_COMPAT 0 /* We never have 32 bit fixups */
3401da177e4SLinus Torvalds #endif
3411da177e4SLinus Torvalds
342b841b901SDavid Howells /* Flags to be cleared on entry by sendmsg and sendmmsg syscalls */
3434fe38acdSDavid Howells #define MSG_INTERNAL_SENDMSG_FLAGS \
344b848b26cSDavid Howells (MSG_SPLICE_PAGES | MSG_SENDPAGE_NOPOLICY | MSG_SENDPAGE_DECRYPTED)
3451da177e4SLinus Torvalds
3461da177e4SLinus Torvalds /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
3471da177e4SLinus Torvalds #define SOL_IP 0
3481da177e4SLinus Torvalds /* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
3491da177e4SLinus Torvalds #define SOL_TCP 6
3501da177e4SLinus Torvalds #define SOL_UDP 17
3511da177e4SLinus Torvalds #define SOL_IPV6 41
3521da177e4SLinus Torvalds #define SOL_ICMPV6 58
3531da177e4SLinus Torvalds #define SOL_SCTP 132
354ba4e58ecSGerrit Renker #define SOL_UDPLITE 136 /* UDP-Lite (RFC 3828) */
3551da177e4SLinus Torvalds #define SOL_RAW 255
3561da177e4SLinus Torvalds #define SOL_IPX 256
3571da177e4SLinus Torvalds #define SOL_AX25 257
3581da177e4SLinus Torvalds #define SOL_ATALK 258
3591da177e4SLinus Torvalds #define SOL_NETROM 259
3601da177e4SLinus Torvalds #define SOL_ROSE 260
3611da177e4SLinus Torvalds #define SOL_DECNET 261
3621da177e4SLinus Torvalds #define SOL_X25 262
3631da177e4SLinus Torvalds #define SOL_PACKET 263
3641da177e4SLinus Torvalds #define SOL_ATM 264 /* ATM layer (cell level) */
3651da177e4SLinus Torvalds #define SOL_AAL 265 /* ATM Adaption Layer (packet level) */
3661da177e4SLinus Torvalds #define SOL_IRDA 266
3671da177e4SLinus Torvalds #define SOL_NETBEUI 267
3681da177e4SLinus Torvalds #define SOL_LLC 268
3697c657876SArnaldo Carvalho de Melo #define SOL_DCCP 269
3709a4595bcSPatrick McHardy #define SOL_NETLINK 270
371b97bf3fdSPer Liden #define SOL_TIPC 271
37217926a79SDavid Howells #define SOL_RXRPC 272
373cf14a4d0SJames Chapman #define SOL_PPPOL2TP 273
3742cb3377aSMarcel Holtmann #define SOL_BLUETOOTH 274
37502a47617SRémi Denis-Courmont #define SOL_PNPIPE 275
3768a7c4c77SAndy Grover #define SOL_RDS 276
3779d5c5d8fSHendrik Brueckner #define SOL_IUCV 277
37870596b61SSjur Braendeland #define SOL_CAIF 278
379c2f9bff5SHerbert Xu #define SOL_ALG 279
38026fd76caSSamuel Ortiz #define SOL_NFC 280
381ab7ac4ebSTom Herbert #define SOL_KCM 281
3823c4d7559SDave Watson #define SOL_TLS 282
38368e8b849SBjörn Töpel #define SOL_XDP 283
38455c42fa7SFlorian Westphal #define SOL_MPTCP 284
38599ce45d5SJeremy Kerr #define SOL_MCTP 285
386a6a6fe27SD. Wythe #define SOL_SMC 286
38749dbe25aSArseniy Krasnov #define SOL_VSOCK 287
3881da177e4SLinus Torvalds
3891da177e4SLinus Torvalds /* IPX options */
3901da177e4SLinus Torvalds #define IPX_TYPE 1
3911da177e4SLinus Torvalds
39243db362dSMaciej Żenczykowski extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr);
3931da177e4SLinus Torvalds extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
3941da177e4SLinus Torvalds
3959718475eSDeepa Dinamani struct timespec64;
396e11d4284SArnd Bergmann struct __kernel_timespec;
397e11d4284SArnd Bergmann struct old_timespec32;
398a2e27255SArnaldo Carvalho de Melo
3999718475eSDeepa Dinamani struct scm_timestamping_internal {
4009718475eSDeepa Dinamani struct timespec64 ts[3];
4019718475eSDeepa Dinamani };
4029718475eSDeepa Dinamani
4039718475eSDeepa Dinamani extern void put_cmsg_scm_timestamping64(struct msghdr *msg, struct scm_timestamping_internal *tss);
4049718475eSDeepa Dinamani extern void put_cmsg_scm_timestamping(struct msghdr *msg, struct scm_timestamping_internal *tss);
4059718475eSDeepa Dinamani
406e1834a32SDominik Brodowski /* The __sys_...msg variants allow MSG_CMSG_COMPAT iff
407e1834a32SDominik Brodowski * forbid_cmsg_compat==false
408e1834a32SDominik Brodowski */
409e1834a32SDominik Brodowski extern long __sys_recvmsg(int fd, struct user_msghdr __user *msg,
410e1834a32SDominik Brodowski unsigned int flags, bool forbid_cmsg_compat);
411e1834a32SDominik Brodowski extern long __sys_sendmsg(int fd, struct user_msghdr __user *msg,
412e1834a32SDominik Brodowski unsigned int flags, bool forbid_cmsg_compat);
413e11d4284SArnd Bergmann extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg,
414e11d4284SArnd Bergmann unsigned int vlen, unsigned int flags,
415e11d4284SArnd Bergmann struct __kernel_timespec __user *timeout,
416e11d4284SArnd Bergmann struct old_timespec32 __user *timeout32);
417228e548eSAnton Blanchard extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg,
418e1834a32SDominik Brodowski unsigned int vlen, unsigned int flags,
419e1834a32SDominik Brodowski bool forbid_cmsg_compat);
42003b1230cSJens Axboe extern long __sys_sendmsg_sock(struct socket *sock, struct msghdr *msg,
4210fa03c62SJens Axboe unsigned int flags);
42203b1230cSJens Axboe extern long __sys_recvmsg_sock(struct socket *sock, struct msghdr *msg,
42303b1230cSJens Axboe struct user_msghdr __user *umsg,
42403b1230cSJens Axboe struct sockaddr __user *uaddr,
425aa1fa28fSJens Axboe unsigned int flags);
4267fa875b8SDylan Yudaken extern int __copy_msghdr(struct msghdr *kmsg,
4277fa875b8SDylan Yudaken struct user_msghdr *umsg,
4287fa875b8SDylan Yudaken struct sockaddr __user **save_addr);
4297a09e1ebSDominik Brodowski
4307a09e1ebSDominik Brodowski /* helpers which do the actual work for syscalls */
4317a09e1ebSDominik Brodowski extern int __sys_recvfrom(int fd, void __user *ubuf, size_t size,
4327a09e1ebSDominik Brodowski unsigned int flags, struct sockaddr __user *addr,
4337a09e1ebSDominik Brodowski int __user *addr_len);
434211b634bSDominik Brodowski extern int __sys_sendto(int fd, void __user *buff, size_t len,
435211b634bSDominik Brodowski unsigned int flags, struct sockaddr __user *addr,
436211b634bSDominik Brodowski int addr_len);
437*0645fbe7SJens Axboe extern struct file *do_accept(struct file *file, struct proto_accept_arg *arg,
438d32f89daSPavel Begunkov struct sockaddr __user *upeer_sockaddr,
439d32f89daSPavel Begunkov int __user *upeer_addrlen, int flags);
4404541e805SDominik Brodowski extern int __sys_accept4(int fd, struct sockaddr __user *upeer_sockaddr,
4414541e805SDominik Brodowski int __user *upeer_addrlen, int flags);
4429d6a15c3SDominik Brodowski extern int __sys_socket(int family, int type, int protocol);
443da214a47SJens Axboe extern struct file *__sys_socket_file(int family, int type, int protocol);
444a87d35d8SDominik Brodowski extern int __sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen);
445f499a021SJens Axboe extern int __sys_connect_file(struct file *file, struct sockaddr_storage *addr,
446f499a021SJens Axboe int addrlen, int file_flags);
4471387c2c2SDominik Brodowski extern int __sys_connect(int fd, struct sockaddr __user *uservaddr,
4481387c2c2SDominik Brodowski int addrlen);
44925e290eeSDominik Brodowski extern int __sys_listen(int fd, int backlog);
4508882a107SDominik Brodowski extern int __sys_getsockname(int fd, struct sockaddr __user *usockaddr,
4518882a107SDominik Brodowski int __user *usockaddr_len);
452b21c8f83SDominik Brodowski extern int __sys_getpeername(int fd, struct sockaddr __user *usockaddr,
453b21c8f83SDominik Brodowski int __user *usockaddr_len);
4546debc8d8SDominik Brodowski extern int __sys_socketpair(int family, int type, int protocol,
4556debc8d8SDominik Brodowski int __user *usockvec);
456b713c195SJens Axboe extern int __sys_shutdown_sock(struct socket *sock, int how);
457005a1aeaSDominik Brodowski extern int __sys_shutdown(int fd, int how);
4581da177e4SLinus Torvalds #endif /* _LINUX_SOCKET_H */
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