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; 1261ded5e5aSEric 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, ...) \ 302*f29f9199SGeert Uytterhoeven no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 303d92cff89SJason A. Donenfeld #endif 3043a3bfb61SJoe Perches 305a48e4292SHannes Frederic Sowa #define net_get_random_once(buf, nbytes) \ 30646234253SHannes Frederic Sowa get_random_once((buf), (nbytes)) 307a48e4292SHannes Frederic Sowa 308c381b079SColy Li /* 309c381b079SColy Li * E.g. XFS meta- & log-data is in slab pages, or bcache meta 310c381b079SColy Li * data pages, or other high order pages allocated by 311c381b079SColy Li * __get_free_pages() without __GFP_COMP, which have a page_count 312c381b079SColy Li * of 0 and/or have PageSlab() set. We cannot use send_page for 313c381b079SColy Li * those, as that does get_page(); put_page(); and would cause 314c381b079SColy Li * either a VM_BUG directly, or __page_cache_release a page that 315c381b079SColy Li * would actually still be referenced by someone, leading to some 316c381b079SColy Li * obscure delayed Oops somewhere else. 317c381b079SColy Li */ 318c381b079SColy Li static inline bool sendpage_ok(struct page *page) 319c381b079SColy Li { 320c381b079SColy Li return !PageSlab(page) && page_count(page) >= 1; 321c381b079SColy Li } 322c381b079SColy Li 3237965bd4dSJoe Perches int kernel_sendmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec, 3247965bd4dSJoe Perches size_t num, size_t len); 325306b13ebSTom Herbert int kernel_sendmsg_locked(struct sock *sk, struct msghdr *msg, 326306b13ebSTom Herbert struct kvec *vec, size_t num, size_t len); 3277965bd4dSJoe Perches int kernel_recvmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec, 3287965bd4dSJoe Perches size_t num, size_t len, int flags); 3291da177e4SLinus Torvalds 3307965bd4dSJoe Perches int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen); 3317965bd4dSJoe Perches int kernel_listen(struct socket *sock, int backlog); 3327965bd4dSJoe Perches int kernel_accept(struct socket *sock, struct socket **newsock, int flags); 3337965bd4dSJoe Perches int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, 334ac5a488eSSridhar Samudrala int flags); 3359b2c45d4SDenys Vlasenko int kernel_getsockname(struct socket *sock, struct sockaddr *addr); 3369b2c45d4SDenys Vlasenko int kernel_getpeername(struct socket *sock, struct sockaddr *addr); 3377965bd4dSJoe Perches int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how); 338ac5a488eSSridhar Samudrala 33957240d00SR. Parameswaran /* Routine returns the IP overhead imposed by a (caller-protected) socket. */ 340113c3075SR. Parameswaran u32 kernel_sock_ip_overhead(struct sock *sk); 341113c3075SR. Parameswaran 3421da177e4SLinus Torvalds #define MODULE_ALIAS_NETPROTO(proto) \ 3431da177e4SLinus Torvalds MODULE_ALIAS("net-pf-" __stringify(proto)) 3441da177e4SLinus Torvalds 3454fdb3bb7SHarald Welte #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \ 3464fdb3bb7SHarald Welte MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto)) 3474fdb3bb7SHarald Welte 348305e1e96SJean Delvare #define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \ 349305e1e96SJean Delvare MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \ 350305e1e96SJean Delvare "-type-" __stringify(type)) 351305e1e96SJean Delvare 3522033e9bfSNeil Horman #define MODULE_ALIAS_NET_PF_PROTO_NAME(pf, proto, name) \ 3532033e9bfSNeil Horman MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \ 3542033e9bfSNeil Horman name) 3551da177e4SLinus Torvalds #endif /* _LINUX_NET_H */ 356