cregit-Linux how code gets into the kernel

Release 4.12 include/linux/socket.h

Directory: include/linux
#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;


#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; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)8697.73%787.50%
Ben Hutchings22.27%112.50%
Total88100.00%8100.00%


static inline struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg) { return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3193.94%266.67%
Ben Hutchings26.06%133.33%
Total33100.00%3100.00%


static inline size_t msg_data_left(struct msghdr *msg) { return iov_iter_count(&msg->msg_iter); }

Contributors

PersonTokensPropCommitsCommitProp
Al Viro21100.00%1100.00%
Total21100.00%1100.00%

/* "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_MAX 44 /* 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_MAX AF_MAX /* Maximum queue length specifiable by listen. */ #define SOMAXCONN 128 /* 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_NOTLAST 0x20000 /* sendpage() internal : not the last page */ #define MSG_BATCH 0x40000 /* sendmmsg(): more messages coming */ #define MSG_EOF MSG_FIN #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 /* 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 timespec; /* The __sys_...msg variants allow MSG_CMSG_COMPAT */ extern long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned flags); extern long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned flags); extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, unsigned int flags, struct timespec *timeout); extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, unsigned int flags); #endif /* _LINUX_SOCKET_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)74257.08%4944.14%
Al Viro685.23%32.70%
Arnaldo Carvalho de Melo644.92%32.70%
Linus Torvalds453.46%43.60%
Andrew Lutomirski332.54%10.90%
Anton Blanchard221.69%10.90%
Herbert Xu221.69%21.80%
Benjamin LaHaise201.54%10.90%
Tom Herbert181.38%21.80%
David Howells161.23%21.80%
Eric W. Biedermann151.15%21.80%
Andy Grover131.00%10.90%
Sjur Brændeland131.00%10.90%
Rémi Denis-Courmont131.00%21.80%
Per Liden131.00%10.90%
Gu Zheng100.77%10.90%
Ursula Braun100.77%10.90%
Courtney Cavin90.69%10.90%
Karsten Keil90.69%10.90%
Sean Hefty90.69%10.90%
Andy King90.69%10.90%
Aloisio Almeida Jr90.69%10.90%
Oliver Hartkopp90.69%10.90%
Jennifer Hunt90.69%10.90%
Sergey Lapin90.69%10.90%
Cyrill V. Gorcunov80.62%10.90%
Eric Dumazet70.54%21.80%
Tadeusz Struk60.46%10.90%
Brandon L Black50.38%10.90%
Gerrit Renker50.38%10.90%
François-Xavier Le Bail50.38%10.90%
Catherine Zhang50.38%10.90%
Yuchung Cheng50.38%10.90%
Ulrich Drepper40.31%10.90%
Patrick McHardy40.31%10.90%
Jon Grimm40.31%10.90%
Ben Hutchings40.31%10.90%
James Chapman40.31%10.90%
Hendrik Brueckner40.31%10.90%
Marcel Holtmann40.31%10.90%
Samuel Ortiz40.31%10.90%
yuan linyu30.23%10.90%
Bruce W Allan30.23%10.90%
Hideaki Yoshifuji / 吉藤英明20.15%21.80%
Rasmus Villemoes10.08%10.90%
David S. Miller10.08%10.90%
Lucas De Marchi10.08%10.90%
Olaf Hering10.08%10.90%
Maciej Żenczykowski10.08%10.90%
Total1300100.00%111100.00%
Directory: include/linux
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