12874c5fdSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-or-later */
21da177e4SLinus Torvalds /*
31da177e4SLinus Torvalds * NET An implementation of the SOCKET network access protocol.
41da177e4SLinus Torvalds * This is the master header file for the Linux NET layer,
51da177e4SLinus Torvalds * or, in plain English: the networking handling part of the
61da177e4SLinus Torvalds * kernel.
71da177e4SLinus Torvalds *
81da177e4SLinus Torvalds * Version: @(#)net.h 1.0.3 05/25/93
91da177e4SLinus Torvalds *
101da177e4SLinus Torvalds * Authors: Orest Zborowski, <obz@Kodak.COM>
1102c30a84SJesper Juhl * Ross Biro
121da177e4SLinus Torvalds * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
131da177e4SLinus Torvalds */
141da177e4SLinus Torvalds #ifndef _LINUX_NET_H
151da177e4SLinus Torvalds #define _LINUX_NET_H
161da177e4SLinus Torvalds
17eacf17bdSDavid Woodhouse #include <linux/stringify.h>
18cb4db4c2SDavid Woodhouse #include <linux/random.h>
195770a3fbSDavid Woodhouse #include <linux/wait.h>
205770a3fbSDavid Woodhouse #include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */
2143815482SEric Dumazet #include <linux/rcupdate.h>
2246234253SHannes Frederic Sowa #include <linux/once.h>
230294b625STom Herbert #include <linux/fs.h>
24c381b079SColy Li #include <linux/mm.h>
25a7b75c5aSChristoph Hellwig #include <linux/sockptr.h>
2646234253SHannes Frederic Sowa
27607ca46eSDavid Howells #include <uapi/linux/net.h>
285770a3fbSDavid Woodhouse
295770a3fbSDavid Woodhouse struct poll_table_struct;
305770a3fbSDavid Woodhouse struct pipe_inode_info;
315770a3fbSDavid Woodhouse struct inode;
3256b31d1cSAl Viro struct file;
335770a3fbSDavid Woodhouse struct net;
341da177e4SLinus Torvalds
35ceb5d58bSEric Dumazet /* Historically, SOCKWQ_ASYNC_NOSPACE & SOCKWQ_ASYNC_WAITDATA were located
36ceb5d58bSEric Dumazet * in sock->flags, but moved into sk->sk_wq->flags to be RCU protected.
37b3dc8f77STonghao Zhang * Eventually all flags will be in sk->sk_wq->flags.
38ceb5d58bSEric Dumazet */
399cd3e072SEric Dumazet #define SOCKWQ_ASYNC_NOSPACE 0
409cd3e072SEric Dumazet #define SOCKWQ_ASYNC_WAITDATA 1
411da177e4SLinus Torvalds #define SOCK_NOSPACE 2
421da177e4SLinus Torvalds #define SOCK_PASSCRED 3
43877ce7c1SCatherine Zhang #define SOCK_PASSSEC 4
44e993ffe3SPavel Begunkov #define SOCK_SUPPORT_ZC 5
4596917bb3SJakub Kicinski #define SOCK_CUSTOM_SOCKOPT 6
465e2ff670SAlexander Mikhalitsyn #define SOCK_PASSPIDFD 7
471da177e4SLinus Torvalds
481da177e4SLinus Torvalds #ifndef ARCH_HAS_SOCKET_TYPES
494dc3b16bSPavel Pisa /**
504dc3b16bSPavel Pisa * enum sock_type - Socket types
514dc3b16bSPavel Pisa * @SOCK_STREAM: stream (connection) socket
524dc3b16bSPavel Pisa * @SOCK_DGRAM: datagram (conn.less) socket
534dc3b16bSPavel Pisa * @SOCK_RAW: raw socket
544dc3b16bSPavel Pisa * @SOCK_RDM: reliably-delivered message
554dc3b16bSPavel Pisa * @SOCK_SEQPACKET: sequential packet socket
568f2709b5SRandy Dunlap * @SOCK_DCCP: Datagram Congestion Control Protocol socket
574dc3b16bSPavel Pisa * @SOCK_PACKET: linux specific way of getting packets at the dev level.
584dc3b16bSPavel Pisa * For writing rarp and other similar things on the user level.
591da177e4SLinus Torvalds *
601da177e4SLinus Torvalds * When adding some new socket type please
611da177e4SLinus Torvalds * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
621da177e4SLinus Torvalds * overrides this enum for binary compat reasons.
631da177e4SLinus Torvalds */
641da177e4SLinus Torvalds enum sock_type {
651da177e4SLinus Torvalds SOCK_STREAM = 1,
661da177e4SLinus Torvalds SOCK_DGRAM = 2,
671da177e4SLinus Torvalds SOCK_RAW = 3,
681da177e4SLinus Torvalds SOCK_RDM = 4,
691da177e4SLinus Torvalds SOCK_SEQPACKET = 5,
707c657876SArnaldo Carvalho de Melo SOCK_DCCP = 6,
711da177e4SLinus Torvalds SOCK_PACKET = 10,
721da177e4SLinus Torvalds };
731da177e4SLinus Torvalds
741da177e4SLinus Torvalds #define SOCK_MAX (SOCK_PACKET + 1)
75a677a039SUlrich Drepper /* Mask which covers at least up to SOCK_MASK-1. The
76a677a039SUlrich Drepper * remaining bits are used as flags. */
77a677a039SUlrich Drepper #define SOCK_TYPE_MASK 0xf
78a677a039SUlrich Drepper
79de11defeSUlrich Drepper /* Flags for socket, socketpair, accept4 */
80a677a039SUlrich Drepper #define SOCK_CLOEXEC O_CLOEXEC
81c019bbc6SUlrich Drepper #ifndef SOCK_NONBLOCK
82c019bbc6SUlrich Drepper #define SOCK_NONBLOCK O_NONBLOCK
83c019bbc6SUlrich Drepper #endif
841da177e4SLinus Torvalds
851da177e4SLinus Torvalds #endif /* ARCH_HAS_SOCKET_TYPES */
861da177e4SLinus Torvalds
878a3c245cSPedro Tammela /**
888a3c245cSPedro Tammela * enum sock_shutdown_cmd - Shutdown types
898a3c245cSPedro Tammela * @SHUT_RD: shutdown receptions
908a3c245cSPedro Tammela * @SHUT_WR: shutdown transmissions
918a3c245cSPedro Tammela * @SHUT_RDWR: shutdown receptions/transmissions
928a3c245cSPedro Tammela */
9391cf45f0STrond Myklebust enum sock_shutdown_cmd {
940e9649c1SJean Sacren SHUT_RD,
950e9649c1SJean Sacren SHUT_WR,
960e9649c1SJean Sacren SHUT_RDWR,
9791cf45f0STrond Myklebust };
9891cf45f0STrond Myklebust
9943815482SEric Dumazet struct socket_wq {
100eaefd110SEric Dumazet /* Note: wait MUST be first field of socket_wq */
10143815482SEric Dumazet wait_queue_head_t wait;
10243815482SEric Dumazet struct fasync_struct *fasync_list;
103ceb5d58bSEric Dumazet unsigned long flags; /* %SOCKWQ_ASYNC_NOSPACE, etc */
10443815482SEric Dumazet struct rcu_head rcu;
10543815482SEric Dumazet } ____cacheline_aligned_in_smp;
10643815482SEric Dumazet
1071da177e4SLinus Torvalds /**
1081da177e4SLinus Torvalds * struct socket - general BSD socket
1094dc3b16bSPavel Pisa * @state: socket state (%SS_CONNECTED, etc)
1102c693610SRichard Kennedy * @type: socket type (%SOCK_STREAM, etc)
1119cd3e072SEric Dumazet * @flags: socket flags (%SOCK_NOSPACE, etc)
1124dc3b16bSPavel Pisa * @ops: protocol specific socket operations
1134dc3b16bSPavel Pisa * @file: File back pointer for gc
1144dc3b16bSPavel Pisa * @sk: internal networking protocol agnostic socket representation
115e2aec372SRandy Dunlap * @wq: wait queue for several uses
1161da177e4SLinus Torvalds */
1171da177e4SLinus Torvalds struct socket {
1181da177e4SLinus Torvalds socket_state state;
11929a020d3SEric Dumazet
1202c693610SRichard Kennedy short type;
12129a020d3SEric Dumazet
1221da177e4SLinus Torvalds unsigned long flags;
12343815482SEric Dumazet
1241da177e4SLinus Torvalds struct file *file;
1251da177e4SLinus Torvalds struct sock *sk;
126*1ded5e5aSEric Dumazet const struct proto_ops *ops; /* Might change with IPV6_ADDRFORM or MPTCP. */
127333f7909SAl Viro
128333f7909SAl Viro struct socket_wq wq;
1291da177e4SLinus Torvalds };
1301da177e4SLinus Torvalds
131b2403a61SMatthew Wilcox (Oracle) /*
132b2403a61SMatthew Wilcox (Oracle) * "descriptor" for what we're up to with a read.
133b2403a61SMatthew Wilcox (Oracle) * This allows us to use the same read code yet
134b2403a61SMatthew Wilcox (Oracle) * have multiple different users of the data that
135b2403a61SMatthew Wilcox (Oracle) * we read from a file.
136b2403a61SMatthew Wilcox (Oracle) *
137b2403a61SMatthew Wilcox (Oracle) * The simplest case just copies the data to user
138b2403a61SMatthew Wilcox (Oracle) * mode.
139b2403a61SMatthew Wilcox (Oracle) */
140b2403a61SMatthew Wilcox (Oracle) typedef struct {
141b2403a61SMatthew Wilcox (Oracle) size_t written;
142b2403a61SMatthew Wilcox (Oracle) size_t count;
143b2403a61SMatthew Wilcox (Oracle) union {
144b2403a61SMatthew Wilcox (Oracle) char __user *buf;
145b2403a61SMatthew Wilcox (Oracle) void *data;
146b2403a61SMatthew Wilcox (Oracle) } arg;
147b2403a61SMatthew Wilcox (Oracle) int error;
148b2403a61SMatthew Wilcox (Oracle) } read_descriptor_t;
149b2403a61SMatthew Wilcox (Oracle)
1501da177e4SLinus Torvalds struct vm_area_struct;
1511da177e4SLinus Torvalds struct page;
1521da177e4SLinus Torvalds struct sockaddr;
1531da177e4SLinus Torvalds struct msghdr;
1541da177e4SLinus Torvalds struct module;
1550294b625STom Herbert struct sk_buff;
1560294b625STom Herbert typedef int (*sk_read_actor_t)(read_descriptor_t *, struct sk_buff *,
1570294b625STom Herbert unsigned int, size_t);
158965b57b4SCong Wang typedef int (*skb_read_actor_t)(struct sock *, struct sk_buff *);
159965b57b4SCong Wang
1601da177e4SLinus Torvalds
1611da177e4SLinus Torvalds struct proto_ops {
1621da177e4SLinus Torvalds int family;
1631da177e4SLinus Torvalds struct module *owner;
1641da177e4SLinus Torvalds int (*release) (struct socket *sock);
1651da177e4SLinus Torvalds int (*bind) (struct socket *sock,
1661da177e4SLinus Torvalds struct sockaddr *myaddr,
1671da177e4SLinus Torvalds int sockaddr_len);
1681da177e4SLinus Torvalds int (*connect) (struct socket *sock,
1691da177e4SLinus Torvalds struct sockaddr *vaddr,
1701da177e4SLinus Torvalds int sockaddr_len, int flags);
1711da177e4SLinus Torvalds int (*socketpair)(struct socket *sock1,
1721da177e4SLinus Torvalds struct socket *sock2);
1731da177e4SLinus Torvalds int (*accept) (struct socket *sock,
174cdfbabfbSDavid Howells struct socket *newsock, int flags, bool kern);
1751da177e4SLinus Torvalds int (*getname) (struct socket *sock,
1761da177e4SLinus Torvalds struct sockaddr *addr,
1779b2c45d4SDenys Vlasenko int peer);
178a3f8683bSAl Viro __poll_t (*poll) (struct file *file, struct socket *sock,
1791da177e4SLinus Torvalds struct poll_table_struct *wait);
1801da177e4SLinus Torvalds int (*ioctl) (struct socket *sock, unsigned int cmd,
1811da177e4SLinus Torvalds unsigned long arg);
1821621e094SAlexey Dobriyan #ifdef CONFIG_COMPAT
18389bbfc95SShaun Pereira int (*compat_ioctl) (struct socket *sock, unsigned int cmd,
18489bbfc95SShaun Pereira unsigned long arg);
1851621e094SAlexey Dobriyan #endif
186c7cbdbf2SArnd Bergmann int (*gettstamp) (struct socket *sock, void __user *userstamp,
187c7cbdbf2SArnd Bergmann bool timeval, bool time32);
1881da177e4SLinus Torvalds int (*listen) (struct socket *sock, int len);
1891da177e4SLinus Torvalds int (*shutdown) (struct socket *sock, int flags);
1901da177e4SLinus Torvalds int (*setsockopt)(struct socket *sock, int level,
191a7b75c5aSChristoph Hellwig int optname, sockptr_t optval,
192a7b75c5aSChristoph Hellwig unsigned int optlen);
1931da177e4SLinus Torvalds int (*getsockopt)(struct socket *sock, int level,
1941da177e4SLinus Torvalds int optname, char __user *optval, int __user *optlen);
195b4653342SKirill Tkhai void (*show_fdinfo)(struct seq_file *m, struct socket *sock);
1961b784140SYing Xue int (*sendmsg) (struct socket *sock, struct msghdr *m,
1971b784140SYing Xue size_t total_len);
198f3d33426SHannes Frederic Sowa /* Notes for implementing recvmsg:
199f3d33426SHannes Frederic Sowa * ===============================
200f3d33426SHannes Frederic Sowa * msg->msg_namelen should get updated by the recvmsg handlers
201f3d33426SHannes Frederic Sowa * iff msg_name != NULL. It is by default 0 to prevent
202f3d33426SHannes Frederic Sowa * returning uninitialized memory to user space. The recvfrom
203f3d33426SHannes Frederic Sowa * handlers can assume that msg.msg_name is either NULL or has
204f3d33426SHannes Frederic Sowa * a minimum size of sizeof(struct sockaddr_storage).
205f3d33426SHannes Frederic Sowa */
2061b784140SYing Xue int (*recvmsg) (struct socket *sock, struct msghdr *m,
2071b784140SYing Xue size_t total_len, int flags);
2081da177e4SLinus Torvalds int (*mmap) (struct file *file, struct socket *sock,
2091da177e4SLinus Torvalds struct vm_area_struct * vma);
2109c55e01cSJens Axboe ssize_t (*splice_read)(struct socket *sock, loff_t *ppos,
2119c55e01cSJens Axboe struct pipe_inode_info *pipe, size_t len, unsigned int flags);
2122bfc6685SDavid Howells void (*splice_eof)(struct socket *sock);
21312663bfcSSasha Levin int (*set_peek_off)(struct sock *sk, int val);
2141576d986SJason Wang int (*peek_len)(struct socket *sock);
215306b13ebSTom Herbert
216306b13ebSTom Herbert /* The following functions are called internally by kernel with
217306b13ebSTom Herbert * sock lock already held.
218306b13ebSTom Herbert */
2190294b625STom Herbert int (*read_sock)(struct sock *sk, read_descriptor_t *desc,
2200294b625STom Herbert sk_read_actor_t recv_actor);
221965b57b4SCong Wang /* This is different from read_sock(), it reads an entire skb at a time. */
222965b57b4SCong Wang int (*read_skb)(struct sock *sk, skb_read_actor_t recv_actor);
223306b13ebSTom Herbert int (*sendmsg_locked)(struct sock *sk, struct msghdr *msg,
224306b13ebSTom Herbert size_t size);
225d1361840SEric Dumazet int (*set_rcvlowat)(struct sock *sk, int val);
2261da177e4SLinus Torvalds };
2271da177e4SLinus Torvalds
22838bfd8f5SCyrill Gorcunov #define DECLARE_SOCKADDR(type, dst, src) \
22938bfd8f5SCyrill Gorcunov type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; })
23038bfd8f5SCyrill Gorcunov
2311da177e4SLinus Torvalds struct net_proto_family {
2321da177e4SLinus Torvalds int family;
2333f378b68SEric Paris int (*create)(struct net *net, struct socket *sock,
2343f378b68SEric Paris int protocol, int kern);
2351da177e4SLinus Torvalds struct module *owner;
2361da177e4SLinus Torvalds };
2371da177e4SLinus Torvalds
2381da177e4SLinus Torvalds struct iovec;
2391da177e4SLinus Torvalds struct kvec;
2401da177e4SLinus Torvalds
2418d8ad9d7SPavel Emelyanov enum {
2428d8ad9d7SPavel Emelyanov SOCK_WAKE_IO,
2438d8ad9d7SPavel Emelyanov SOCK_WAKE_WAITD,
2448d8ad9d7SPavel Emelyanov SOCK_WAKE_SPACE,
2458d8ad9d7SPavel Emelyanov SOCK_WAKE_URG,
2468d8ad9d7SPavel Emelyanov };
2478d8ad9d7SPavel Emelyanov
248ceb5d58bSEric Dumazet int sock_wake_async(struct socket_wq *sk_wq, int how, int band);
2497965bd4dSJoe Perches int sock_register(const struct net_proto_family *fam);
2507965bd4dSJoe Perches void sock_unregister(int family);
251bf2ae2e4SXin Long bool sock_is_registered(int family);
2527965bd4dSJoe Perches int __sock_create(struct net *net, int family, int type, int proto,
253721db93aSPavel Emelyanov struct socket **res, int kern);
2547965bd4dSJoe Perches int sock_create(int family, int type, int proto, struct socket **res);
255eeb1bd5cSEric W. Biederman int sock_create_kern(struct net *net, int family, int type, int proto, struct socket **res);
2567965bd4dSJoe Perches int sock_create_lite(int family, int type, int proto, struct socket **res);
257f4a00aacSTom Herbert struct socket *sock_alloc(void);
2587965bd4dSJoe Perches void sock_release(struct socket *sock);
259d8725c86SAl Viro int sock_sendmsg(struct socket *sock, struct msghdr *msg);
2602da62906SAl Viro int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags);
2617965bd4dSJoe Perches struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname);
2627965bd4dSJoe Perches struct socket *sockfd_lookup(int fd, int *err);
263dba4a925SFlorent Revest struct socket *sock_from_file(struct file *file);
2641da177e4SLinus Torvalds #define sockfd_put(sock) fput(sock->file)
2657965bd4dSJoe Perches int net_ratelimit(void);
266aaa248f6SStephen Hemminger
2673a3bfb61SJoe Perches #define net_ratelimited_function(function, ...) \
2683a3bfb61SJoe Perches do { \
2693a3bfb61SJoe Perches if (net_ratelimit()) \
2703a3bfb61SJoe Perches function(__VA_ARGS__); \
2713a3bfb61SJoe Perches } while (0)
2723a3bfb61SJoe Perches
2733a3bfb61SJoe Perches #define net_emerg_ratelimited(fmt, ...) \
2743a3bfb61SJoe Perches net_ratelimited_function(pr_emerg, fmt, ##__VA_ARGS__)
2753a3bfb61SJoe Perches #define net_alert_ratelimited(fmt, ...) \
2763a3bfb61SJoe Perches net_ratelimited_function(pr_alert, fmt, ##__VA_ARGS__)
2773a3bfb61SJoe Perches #define net_crit_ratelimited(fmt, ...) \
2783a3bfb61SJoe Perches net_ratelimited_function(pr_crit, fmt, ##__VA_ARGS__)
2793a3bfb61SJoe Perches #define net_err_ratelimited(fmt, ...) \
2803a3bfb61SJoe Perches net_ratelimited_function(pr_err, fmt, ##__VA_ARGS__)
2813a3bfb61SJoe Perches #define net_notice_ratelimited(fmt, ...) \
2823a3bfb61SJoe Perches net_ratelimited_function(pr_notice, fmt, ##__VA_ARGS__)
2833a3bfb61SJoe Perches #define net_warn_ratelimited(fmt, ...) \
2843a3bfb61SJoe Perches net_ratelimited_function(pr_warn, fmt, ##__VA_ARGS__)
2853a3bfb61SJoe Perches #define net_info_ratelimited(fmt, ...) \
2863a3bfb61SJoe Perches net_ratelimited_function(pr_info, fmt, ##__VA_ARGS__)
287ceabef7dSOrson Zhai #if defined(CONFIG_DYNAMIC_DEBUG) || \
288ceabef7dSOrson Zhai (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
2892c94b537STim Bingham #define net_dbg_ratelimited(fmt, ...) \
2902c94b537STim Bingham do { \
2912c94b537STim Bingham DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
2923f16d181SRasmus Villemoes if (DYNAMIC_DEBUG_BRANCH(descriptor) && \
2932c94b537STim Bingham net_ratelimit()) \
294daddef76SJason A. Donenfeld __dynamic_pr_debug(&descriptor, pr_fmt(fmt), \
295daddef76SJason A. Donenfeld ##__VA_ARGS__); \
2962c94b537STim Bingham } while (0)
2972c94b537STim Bingham #elif defined(DEBUG)
2983a3bfb61SJoe Perches #define net_dbg_ratelimited(fmt, ...) \
2993a3bfb61SJoe Perches net_ratelimited_function(pr_debug, fmt, ##__VA_ARGS__)
300d92cff89SJason A. Donenfeld #else
301d92cff89SJason A. Donenfeld #define net_dbg_ratelimited(fmt, ...) \
302d92cff89SJason A. Donenfeld do { \
303d92cff89SJason A. Donenfeld if (0) \
304d92cff89SJason A. Donenfeld no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
305d92cff89SJason A. Donenfeld } while (0)
306d92cff89SJason A. Donenfeld #endif
3073a3bfb61SJoe Perches
308a48e4292SHannes Frederic Sowa #define net_get_random_once(buf, nbytes) \
30946234253SHannes Frederic Sowa get_random_once((buf), (nbytes))
310a48e4292SHannes Frederic Sowa
311c381b079SColy Li /*
312c381b079SColy Li * E.g. XFS meta- & log-data is in slab pages, or bcache meta
313c381b079SColy Li * data pages, or other high order pages allocated by
314c381b079SColy Li * __get_free_pages() without __GFP_COMP, which have a page_count
315c381b079SColy Li * of 0 and/or have PageSlab() set. We cannot use send_page for
316c381b079SColy Li * those, as that does get_page(); put_page(); and would cause
317c381b079SColy Li * either a VM_BUG directly, or __page_cache_release a page that
318c381b079SColy Li * would actually still be referenced by someone, leading to some
319c381b079SColy Li * obscure delayed Oops somewhere else.
320c381b079SColy Li */
sendpage_ok(struct page * page)321c381b079SColy Li static inline bool sendpage_ok(struct page *page)
322c381b079SColy Li {
323c381b079SColy Li return !PageSlab(page) && page_count(page) >= 1;
324c381b079SColy Li }
325c381b079SColy Li
3267965bd4dSJoe Perches int kernel_sendmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec,
3277965bd4dSJoe Perches size_t num, size_t len);
328306b13ebSTom Herbert int kernel_sendmsg_locked(struct sock *sk, struct msghdr *msg,
329306b13ebSTom Herbert struct kvec *vec, size_t num, size_t len);
3307965bd4dSJoe Perches int kernel_recvmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec,
3317965bd4dSJoe Perches size_t num, size_t len, int flags);
3321da177e4SLinus Torvalds
3337965bd4dSJoe Perches int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen);
3347965bd4dSJoe Perches int kernel_listen(struct socket *sock, int backlog);
3357965bd4dSJoe Perches int kernel_accept(struct socket *sock, struct socket **newsock, int flags);
3367965bd4dSJoe Perches int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen,
337ac5a488eSSridhar Samudrala int flags);
3389b2c45d4SDenys Vlasenko int kernel_getsockname(struct socket *sock, struct sockaddr *addr);
3399b2c45d4SDenys Vlasenko int kernel_getpeername(struct socket *sock, struct sockaddr *addr);
3407965bd4dSJoe Perches int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how);
341ac5a488eSSridhar Samudrala
34257240d00SR. Parameswaran /* Routine returns the IP overhead imposed by a (caller-protected) socket. */
343113c3075SR. Parameswaran u32 kernel_sock_ip_overhead(struct sock *sk);
344113c3075SR. Parameswaran
3451da177e4SLinus Torvalds #define MODULE_ALIAS_NETPROTO(proto) \
3461da177e4SLinus Torvalds MODULE_ALIAS("net-pf-" __stringify(proto))
3471da177e4SLinus Torvalds
3484fdb3bb7SHarald Welte #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
3494fdb3bb7SHarald Welte MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
3504fdb3bb7SHarald Welte
351305e1e96SJean Delvare #define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
352305e1e96SJean Delvare MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
353305e1e96SJean Delvare "-type-" __stringify(type))
354305e1e96SJean Delvare
3552033e9bfSNeil Horman #define MODULE_ALIAS_NET_PF_PROTO_NAME(pf, proto, name) \
3562033e9bfSNeil Horman MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
3572033e9bfSNeil Horman name)
3581da177e4SLinus Torvalds #endif /* _LINUX_NET_H */
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