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> 2446234253SHannes Frederic Sowa 25607ca46eSDavid Howells #include <uapi/linux/net.h> 265770a3fbSDavid Woodhouse 275770a3fbSDavid Woodhouse struct poll_table_struct; 285770a3fbSDavid Woodhouse struct pipe_inode_info; 295770a3fbSDavid Woodhouse struct inode; 3056b31d1cSAl Viro struct file; 315770a3fbSDavid Woodhouse struct net; 321da177e4SLinus Torvalds 33ceb5d58bSEric Dumazet /* Historically, SOCKWQ_ASYNC_NOSPACE & SOCKWQ_ASYNC_WAITDATA were located 34ceb5d58bSEric Dumazet * in sock->flags, but moved into sk->sk_wq->flags to be RCU protected. 35b3dc8f77STonghao Zhang * Eventually all flags will be in sk->sk_wq->flags. 36ceb5d58bSEric Dumazet */ 379cd3e072SEric Dumazet #define SOCKWQ_ASYNC_NOSPACE 0 389cd3e072SEric Dumazet #define SOCKWQ_ASYNC_WAITDATA 1 391da177e4SLinus Torvalds #define SOCK_NOSPACE 2 401da177e4SLinus Torvalds #define SOCK_PASSCRED 3 41877ce7c1SCatherine Zhang #define SOCK_PASSSEC 4 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds #ifndef ARCH_HAS_SOCKET_TYPES 444dc3b16bSPavel Pisa /** 454dc3b16bSPavel Pisa * enum sock_type - Socket types 464dc3b16bSPavel Pisa * @SOCK_STREAM: stream (connection) socket 474dc3b16bSPavel Pisa * @SOCK_DGRAM: datagram (conn.less) socket 484dc3b16bSPavel Pisa * @SOCK_RAW: raw socket 494dc3b16bSPavel Pisa * @SOCK_RDM: reliably-delivered message 504dc3b16bSPavel Pisa * @SOCK_SEQPACKET: sequential packet socket 518f2709b5SRandy Dunlap * @SOCK_DCCP: Datagram Congestion Control Protocol socket 524dc3b16bSPavel Pisa * @SOCK_PACKET: linux specific way of getting packets at the dev level. 534dc3b16bSPavel Pisa * For writing rarp and other similar things on the user level. 541da177e4SLinus Torvalds * 551da177e4SLinus Torvalds * When adding some new socket type please 561da177e4SLinus Torvalds * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS 571da177e4SLinus Torvalds * overrides this enum for binary compat reasons. 581da177e4SLinus Torvalds */ 591da177e4SLinus Torvalds enum sock_type { 601da177e4SLinus Torvalds SOCK_STREAM = 1, 611da177e4SLinus Torvalds SOCK_DGRAM = 2, 621da177e4SLinus Torvalds SOCK_RAW = 3, 631da177e4SLinus Torvalds SOCK_RDM = 4, 641da177e4SLinus Torvalds SOCK_SEQPACKET = 5, 657c657876SArnaldo Carvalho de Melo SOCK_DCCP = 6, 661da177e4SLinus Torvalds SOCK_PACKET = 10, 671da177e4SLinus Torvalds }; 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds #define SOCK_MAX (SOCK_PACKET + 1) 70a677a039SUlrich Drepper /* Mask which covers at least up to SOCK_MASK-1. The 71a677a039SUlrich Drepper * remaining bits are used as flags. */ 72a677a039SUlrich Drepper #define SOCK_TYPE_MASK 0xf 73a677a039SUlrich Drepper 74de11defeSUlrich Drepper /* Flags for socket, socketpair, accept4 */ 75a677a039SUlrich Drepper #define SOCK_CLOEXEC O_CLOEXEC 76c019bbc6SUlrich Drepper #ifndef SOCK_NONBLOCK 77c019bbc6SUlrich Drepper #define SOCK_NONBLOCK O_NONBLOCK 78c019bbc6SUlrich Drepper #endif 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds #endif /* ARCH_HAS_SOCKET_TYPES */ 811da177e4SLinus Torvalds 828a3c245cSPedro Tammela /** 838a3c245cSPedro Tammela * enum sock_shutdown_cmd - Shutdown types 848a3c245cSPedro Tammela * @SHUT_RD: shutdown receptions 858a3c245cSPedro Tammela * @SHUT_WR: shutdown transmissions 868a3c245cSPedro Tammela * @SHUT_RDWR: shutdown receptions/transmissions 878a3c245cSPedro Tammela */ 8891cf45f0STrond Myklebust enum sock_shutdown_cmd { 890e9649c1SJean Sacren SHUT_RD, 900e9649c1SJean Sacren SHUT_WR, 910e9649c1SJean Sacren SHUT_RDWR, 9291cf45f0STrond Myklebust }; 9391cf45f0STrond Myklebust 9443815482SEric Dumazet struct socket_wq { 95eaefd110SEric Dumazet /* Note: wait MUST be first field of socket_wq */ 9643815482SEric Dumazet wait_queue_head_t wait; 9743815482SEric Dumazet struct fasync_struct *fasync_list; 98ceb5d58bSEric Dumazet unsigned long flags; /* %SOCKWQ_ASYNC_NOSPACE, etc */ 9943815482SEric Dumazet struct rcu_head rcu; 10043815482SEric Dumazet } ____cacheline_aligned_in_smp; 10143815482SEric Dumazet 1021da177e4SLinus Torvalds /** 1031da177e4SLinus Torvalds * struct socket - general BSD socket 1044dc3b16bSPavel Pisa * @state: socket state (%SS_CONNECTED, etc) 1052c693610SRichard Kennedy * @type: socket type (%SOCK_STREAM, etc) 1069cd3e072SEric Dumazet * @flags: socket flags (%SOCK_NOSPACE, etc) 1074dc3b16bSPavel Pisa * @ops: protocol specific socket operations 1084dc3b16bSPavel Pisa * @file: File back pointer for gc 1094dc3b16bSPavel Pisa * @sk: internal networking protocol agnostic socket representation 110e2aec372SRandy Dunlap * @wq: wait queue for several uses 1111da177e4SLinus Torvalds */ 1121da177e4SLinus Torvalds struct socket { 1131da177e4SLinus Torvalds socket_state state; 11429a020d3SEric Dumazet 1152c693610SRichard Kennedy short type; 11629a020d3SEric Dumazet 1171da177e4SLinus Torvalds unsigned long flags; 11843815482SEric Dumazet 1191da177e4SLinus Torvalds struct file *file; 1201da177e4SLinus Torvalds struct sock *sk; 1218bdd663aSEric Dumazet const struct proto_ops *ops; 122*333f7909SAl Viro 123*333f7909SAl Viro struct socket_wq wq; 1241da177e4SLinus Torvalds }; 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds struct vm_area_struct; 1271da177e4SLinus Torvalds struct page; 1281da177e4SLinus Torvalds struct sockaddr; 1291da177e4SLinus Torvalds struct msghdr; 1301da177e4SLinus Torvalds struct module; 1310294b625STom Herbert struct sk_buff; 1320294b625STom Herbert typedef int (*sk_read_actor_t)(read_descriptor_t *, struct sk_buff *, 1330294b625STom Herbert unsigned int, size_t); 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds struct proto_ops { 1361da177e4SLinus Torvalds int family; 1371da177e4SLinus Torvalds struct module *owner; 1381da177e4SLinus Torvalds int (*release) (struct socket *sock); 1391da177e4SLinus Torvalds int (*bind) (struct socket *sock, 1401da177e4SLinus Torvalds struct sockaddr *myaddr, 1411da177e4SLinus Torvalds int sockaddr_len); 1421da177e4SLinus Torvalds int (*connect) (struct socket *sock, 1431da177e4SLinus Torvalds struct sockaddr *vaddr, 1441da177e4SLinus Torvalds int sockaddr_len, int flags); 1451da177e4SLinus Torvalds int (*socketpair)(struct socket *sock1, 1461da177e4SLinus Torvalds struct socket *sock2); 1471da177e4SLinus Torvalds int (*accept) (struct socket *sock, 148cdfbabfbSDavid Howells struct socket *newsock, int flags, bool kern); 1491da177e4SLinus Torvalds int (*getname) (struct socket *sock, 1501da177e4SLinus Torvalds struct sockaddr *addr, 1519b2c45d4SDenys Vlasenko int peer); 152a3f8683bSAl Viro __poll_t (*poll) (struct file *file, struct socket *sock, 1531da177e4SLinus Torvalds struct poll_table_struct *wait); 1541da177e4SLinus Torvalds int (*ioctl) (struct socket *sock, unsigned int cmd, 1551da177e4SLinus Torvalds unsigned long arg); 1561621e094SAlexey Dobriyan #ifdef CONFIG_COMPAT 15789bbfc95SShaun Pereira int (*compat_ioctl) (struct socket *sock, unsigned int cmd, 15889bbfc95SShaun Pereira unsigned long arg); 1591621e094SAlexey Dobriyan #endif 160c7cbdbf2SArnd Bergmann int (*gettstamp) (struct socket *sock, void __user *userstamp, 161c7cbdbf2SArnd Bergmann bool timeval, bool time32); 1621da177e4SLinus Torvalds int (*listen) (struct socket *sock, int len); 1631da177e4SLinus Torvalds int (*shutdown) (struct socket *sock, int flags); 1641da177e4SLinus Torvalds int (*setsockopt)(struct socket *sock, int level, 165b7058842SDavid S. Miller int optname, char __user *optval, unsigned int optlen); 1661da177e4SLinus Torvalds int (*getsockopt)(struct socket *sock, int level, 1671da177e4SLinus Torvalds int optname, char __user *optval, int __user *optlen); 1681621e094SAlexey Dobriyan #ifdef CONFIG_COMPAT 1693fdadf7dSDmitry Mishin int (*compat_setsockopt)(struct socket *sock, int level, 170b7058842SDavid S. Miller int optname, char __user *optval, unsigned int optlen); 1713fdadf7dSDmitry Mishin int (*compat_getsockopt)(struct socket *sock, int level, 1723fdadf7dSDmitry Mishin int optname, char __user *optval, int __user *optlen); 1731621e094SAlexey Dobriyan #endif 1741b784140SYing Xue int (*sendmsg) (struct socket *sock, struct msghdr *m, 1751b784140SYing Xue size_t total_len); 176f3d33426SHannes Frederic Sowa /* Notes for implementing recvmsg: 177f3d33426SHannes Frederic Sowa * =============================== 178f3d33426SHannes Frederic Sowa * msg->msg_namelen should get updated by the recvmsg handlers 179f3d33426SHannes Frederic Sowa * iff msg_name != NULL. It is by default 0 to prevent 180f3d33426SHannes Frederic Sowa * returning uninitialized memory to user space. The recvfrom 181f3d33426SHannes Frederic Sowa * handlers can assume that msg.msg_name is either NULL or has 182f3d33426SHannes Frederic Sowa * a minimum size of sizeof(struct sockaddr_storage). 183f3d33426SHannes Frederic Sowa */ 1841b784140SYing Xue int (*recvmsg) (struct socket *sock, struct msghdr *m, 1851b784140SYing Xue size_t total_len, int flags); 1861da177e4SLinus Torvalds int (*mmap) (struct file *file, struct socket *sock, 1871da177e4SLinus Torvalds struct vm_area_struct * vma); 1881da177e4SLinus Torvalds ssize_t (*sendpage) (struct socket *sock, struct page *page, 1891da177e4SLinus Torvalds int offset, size_t size, int flags); 1909c55e01cSJens Axboe ssize_t (*splice_read)(struct socket *sock, loff_t *ppos, 1919c55e01cSJens Axboe struct pipe_inode_info *pipe, size_t len, unsigned int flags); 19212663bfcSSasha Levin int (*set_peek_off)(struct sock *sk, int val); 1931576d986SJason Wang int (*peek_len)(struct socket *sock); 194306b13ebSTom Herbert 195306b13ebSTom Herbert /* The following functions are called internally by kernel with 196306b13ebSTom Herbert * sock lock already held. 197306b13ebSTom Herbert */ 1980294b625STom Herbert int (*read_sock)(struct sock *sk, read_descriptor_t *desc, 1990294b625STom Herbert sk_read_actor_t recv_actor); 200306b13ebSTom Herbert int (*sendpage_locked)(struct sock *sk, struct page *page, 201306b13ebSTom Herbert int offset, size_t size, int flags); 202306b13ebSTom Herbert int (*sendmsg_locked)(struct sock *sk, struct msghdr *msg, 203306b13ebSTom Herbert size_t size); 204d1361840SEric Dumazet int (*set_rcvlowat)(struct sock *sk, int val); 2051da177e4SLinus Torvalds }; 2061da177e4SLinus Torvalds 20738bfd8f5SCyrill Gorcunov #define DECLARE_SOCKADDR(type, dst, src) \ 20838bfd8f5SCyrill Gorcunov type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; }) 20938bfd8f5SCyrill Gorcunov 2101da177e4SLinus Torvalds struct net_proto_family { 2111da177e4SLinus Torvalds int family; 2123f378b68SEric Paris int (*create)(struct net *net, struct socket *sock, 2133f378b68SEric Paris int protocol, int kern); 2141da177e4SLinus Torvalds struct module *owner; 2151da177e4SLinus Torvalds }; 2161da177e4SLinus Torvalds 2171da177e4SLinus Torvalds struct iovec; 2181da177e4SLinus Torvalds struct kvec; 2191da177e4SLinus Torvalds 2208d8ad9d7SPavel Emelyanov enum { 2218d8ad9d7SPavel Emelyanov SOCK_WAKE_IO, 2228d8ad9d7SPavel Emelyanov SOCK_WAKE_WAITD, 2238d8ad9d7SPavel Emelyanov SOCK_WAKE_SPACE, 2248d8ad9d7SPavel Emelyanov SOCK_WAKE_URG, 2258d8ad9d7SPavel Emelyanov }; 2268d8ad9d7SPavel Emelyanov 227ceb5d58bSEric Dumazet int sock_wake_async(struct socket_wq *sk_wq, int how, int band); 2287965bd4dSJoe Perches int sock_register(const struct net_proto_family *fam); 2297965bd4dSJoe Perches void sock_unregister(int family); 230bf2ae2e4SXin Long bool sock_is_registered(int family); 2317965bd4dSJoe Perches int __sock_create(struct net *net, int family, int type, int proto, 232721db93aSPavel Emelyanov struct socket **res, int kern); 2337965bd4dSJoe Perches int sock_create(int family, int type, int proto, struct socket **res); 234eeb1bd5cSEric W. Biederman int sock_create_kern(struct net *net, int family, int type, int proto, struct socket **res); 2357965bd4dSJoe Perches int sock_create_lite(int family, int type, int proto, struct socket **res); 236f4a00aacSTom Herbert struct socket *sock_alloc(void); 2377965bd4dSJoe Perches void sock_release(struct socket *sock); 238d8725c86SAl Viro int sock_sendmsg(struct socket *sock, struct msghdr *msg); 2392da62906SAl Viro int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags); 2407965bd4dSJoe Perches struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname); 2417965bd4dSJoe Perches struct socket *sockfd_lookup(int fd, int *err); 2427965bd4dSJoe Perches struct socket *sock_from_file(struct file *file, int *err); 2431da177e4SLinus Torvalds #define sockfd_put(sock) fput(sock->file) 2447965bd4dSJoe Perches int net_ratelimit(void); 245aaa248f6SStephen Hemminger 2463a3bfb61SJoe Perches #define net_ratelimited_function(function, ...) \ 2473a3bfb61SJoe Perches do { \ 2483a3bfb61SJoe Perches if (net_ratelimit()) \ 2493a3bfb61SJoe Perches function(__VA_ARGS__); \ 2503a3bfb61SJoe Perches } while (0) 2513a3bfb61SJoe Perches 2523a3bfb61SJoe Perches #define net_emerg_ratelimited(fmt, ...) \ 2533a3bfb61SJoe Perches net_ratelimited_function(pr_emerg, fmt, ##__VA_ARGS__) 2543a3bfb61SJoe Perches #define net_alert_ratelimited(fmt, ...) \ 2553a3bfb61SJoe Perches net_ratelimited_function(pr_alert, fmt, ##__VA_ARGS__) 2563a3bfb61SJoe Perches #define net_crit_ratelimited(fmt, ...) \ 2573a3bfb61SJoe Perches net_ratelimited_function(pr_crit, fmt, ##__VA_ARGS__) 2583a3bfb61SJoe Perches #define net_err_ratelimited(fmt, ...) \ 2593a3bfb61SJoe Perches net_ratelimited_function(pr_err, fmt, ##__VA_ARGS__) 2603a3bfb61SJoe Perches #define net_notice_ratelimited(fmt, ...) \ 2613a3bfb61SJoe Perches net_ratelimited_function(pr_notice, fmt, ##__VA_ARGS__) 2623a3bfb61SJoe Perches #define net_warn_ratelimited(fmt, ...) \ 2633a3bfb61SJoe Perches net_ratelimited_function(pr_warn, fmt, ##__VA_ARGS__) 2643a3bfb61SJoe Perches #define net_info_ratelimited(fmt, ...) \ 2653a3bfb61SJoe Perches net_ratelimited_function(pr_info, fmt, ##__VA_ARGS__) 2662c94b537STim Bingham #if defined(CONFIG_DYNAMIC_DEBUG) 2672c94b537STim Bingham #define net_dbg_ratelimited(fmt, ...) \ 2682c94b537STim Bingham do { \ 2692c94b537STim Bingham DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 2703f16d181SRasmus Villemoes if (DYNAMIC_DEBUG_BRANCH(descriptor) && \ 2712c94b537STim Bingham net_ratelimit()) \ 272daddef76SJason A. Donenfeld __dynamic_pr_debug(&descriptor, pr_fmt(fmt), \ 273daddef76SJason A. Donenfeld ##__VA_ARGS__); \ 2742c94b537STim Bingham } while (0) 2752c94b537STim Bingham #elif defined(DEBUG) 2763a3bfb61SJoe Perches #define net_dbg_ratelimited(fmt, ...) \ 2773a3bfb61SJoe Perches net_ratelimited_function(pr_debug, fmt, ##__VA_ARGS__) 278d92cff89SJason A. Donenfeld #else 279d92cff89SJason A. Donenfeld #define net_dbg_ratelimited(fmt, ...) \ 280d92cff89SJason A. Donenfeld do { \ 281d92cff89SJason A. Donenfeld if (0) \ 282d92cff89SJason A. Donenfeld no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ 283d92cff89SJason A. Donenfeld } while (0) 284d92cff89SJason A. Donenfeld #endif 2853a3bfb61SJoe Perches 286a48e4292SHannes Frederic Sowa #define net_get_random_once(buf, nbytes) \ 28746234253SHannes Frederic Sowa get_random_once((buf), (nbytes)) 288da9ba564SJason A. Donenfeld #define net_get_random_once_wait(buf, nbytes) \ 289da9ba564SJason A. Donenfeld get_random_once_wait((buf), (nbytes)) 290a48e4292SHannes Frederic Sowa 2917965bd4dSJoe Perches int kernel_sendmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec, 2927965bd4dSJoe Perches size_t num, size_t len); 293306b13ebSTom Herbert int kernel_sendmsg_locked(struct sock *sk, struct msghdr *msg, 294306b13ebSTom Herbert struct kvec *vec, size_t num, size_t len); 2957965bd4dSJoe Perches int kernel_recvmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec, 2967965bd4dSJoe Perches size_t num, size_t len, int flags); 2971da177e4SLinus Torvalds 2987965bd4dSJoe Perches int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen); 2997965bd4dSJoe Perches int kernel_listen(struct socket *sock, int backlog); 3007965bd4dSJoe Perches int kernel_accept(struct socket *sock, struct socket **newsock, int flags); 3017965bd4dSJoe Perches int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, 302ac5a488eSSridhar Samudrala int flags); 3039b2c45d4SDenys Vlasenko int kernel_getsockname(struct socket *sock, struct sockaddr *addr); 3049b2c45d4SDenys Vlasenko int kernel_getpeername(struct socket *sock, struct sockaddr *addr); 3057965bd4dSJoe Perches int kernel_getsockopt(struct socket *sock, int level, int optname, char *optval, 3067965bd4dSJoe Perches int *optlen); 3077965bd4dSJoe Perches int kernel_setsockopt(struct socket *sock, int level, int optname, char *optval, 3087965bd4dSJoe Perches unsigned int optlen); 3097965bd4dSJoe Perches int kernel_sendpage(struct socket *sock, struct page *page, int offset, 310ac5a488eSSridhar Samudrala size_t size, int flags); 311306b13ebSTom Herbert int kernel_sendpage_locked(struct sock *sk, struct page *page, int offset, 312306b13ebSTom Herbert size_t size, int flags); 3137965bd4dSJoe Perches int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how); 314ac5a488eSSridhar Samudrala 31557240d00SR. Parameswaran /* Routine returns the IP overhead imposed by a (caller-protected) socket. */ 316113c3075SR. Parameswaran u32 kernel_sock_ip_overhead(struct sock *sk); 317113c3075SR. Parameswaran 3181da177e4SLinus Torvalds #define MODULE_ALIAS_NETPROTO(proto) \ 3191da177e4SLinus Torvalds MODULE_ALIAS("net-pf-" __stringify(proto)) 3201da177e4SLinus Torvalds 3214fdb3bb7SHarald Welte #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \ 3224fdb3bb7SHarald Welte MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto)) 3234fdb3bb7SHarald Welte 324305e1e96SJean Delvare #define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \ 325305e1e96SJean Delvare MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \ 326305e1e96SJean Delvare "-type-" __stringify(type)) 327305e1e96SJean Delvare 3282033e9bfSNeil Horman #define MODULE_ALIAS_NET_PF_PROTO_NAME(pf, proto, name) \ 3292033e9bfSNeil Horman MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \ 3302033e9bfSNeil Horman name) 3311da177e4SLinus Torvalds #endif /* _LINUX_NET_H */ 332