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+/*
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+ * INET An implementation of the TCP/IP protocol suite for the LINUX
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+ * operating system. INET is implemented using the BSD Socket
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+ * interface as the means of communication with the user level.
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+ *
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+ * Definitions for inet_sock
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+ *
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+ * Authors: Many, reorganised here by
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+ * Arnaldo Carvalho de Melo <acme@mandriva.com>
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License
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+ * as published by the Free Software Foundation; either version
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+ * 2 of the License, or (at your option) any later version.
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+ */
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+#ifndef _INET_SOCK_H
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+#define _INET_SOCK_H
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+
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+#include <linux/config.h>
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+
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+#include <linux/string.h>
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+#include <linux/types.h>
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+
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+#include <net/flow.h>
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+#include <net/sock.h>
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+#include <net/request_sock.h>
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+
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+/** struct ip_options - IP Options
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+ *
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+ * @faddr - Saved first hop address
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+ * @is_setbyuser - Set by setsockopt?
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+ * @is_data - Options in __data, rather than skb
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+ * @is_strictroute - Strict source route
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+ * @srr_is_hit - Packet destination addr was our one
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+ * @is_changed - IP checksum more not valid
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+ * @rr_needaddr - Need to record addr of outgoing dev
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+ * @ts_needtime - Need to record timestamp
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+ * @ts_needaddr - Need to record addr of outgoing dev
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+ */
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+struct ip_options {
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+ __u32 faddr;
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+ unsigned char optlen;
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+ unsigned char srr;
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+ unsigned char rr;
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+ unsigned char ts;
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+ unsigned char is_setbyuser:1,
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+ is_data:1,
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+ is_strictroute:1,
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+ srr_is_hit:1,
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+ is_changed:1,
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+ rr_needaddr:1,
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+ ts_needtime:1,
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+ ts_needaddr:1;
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+ unsigned char router_alert;
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+ unsigned char __pad1;
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+ unsigned char __pad2;
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+ unsigned char __data[0];
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+};
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+
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+#define optlength(opt) (sizeof(struct ip_options) + opt->optlen)
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+
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+struct inet_request_sock {
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+ struct request_sock req;
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+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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+ u16 inet6_rsk_offset;
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+ /* 2 bytes hole, try to pack */
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+#endif
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+ u32 loc_addr;
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+ u32 rmt_addr;
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+ u16 rmt_port;
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+ u16 snd_wscale : 4,
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+ rcv_wscale : 4,
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+ tstamp_ok : 1,
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+ sack_ok : 1,
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+ wscale_ok : 1,
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+ ecn_ok : 1,
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+ acked : 1;
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+ struct ip_options *opt;
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+};
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+
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+static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk)
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+{
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+ return (struct inet_request_sock *)sk;
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+}
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+
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+struct ip_mc_socklist;
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+struct ipv6_pinfo;
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+struct rtable;
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+
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+/** struct inet_sock - representation of INET sockets
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+ *
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+ * @sk - ancestor class
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+ * @pinet6 - pointer to IPv6 control block
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+ * @daddr - Foreign IPv4 addr
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+ * @rcv_saddr - Bound local IPv4 addr
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+ * @dport - Destination port
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+ * @num - Local port
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+ * @saddr - Sending source
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+ * @uc_ttl - Unicast TTL
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+ * @sport - Source port
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+ * @id - ID counter for DF pkts
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+ * @tos - TOS
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+ * @mc_ttl - Multicasting TTL
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+ * @is_icsk - is this an inet_connection_sock?
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+ * @mc_index - Multicast device index
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+ * @mc_list - Group array
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+ * @cork - info to build ip hdr on each ip frag while socket is corked
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+ */
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+struct inet_sock {
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+ /* sk and pinet6 has to be the first two members of inet_sock */
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+ struct sock sk;
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+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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+ struct ipv6_pinfo *pinet6;
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+#endif
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+ /* Socket demultiplex comparisons on incoming packets. */
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+ __u32 daddr;
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+ __u32 rcv_saddr;
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+ __u16 dport;
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+ __u16 num;
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+ __u32 saddr;
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+ __s16 uc_ttl;
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+ __u16 cmsg_flags;
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+ struct ip_options *opt;
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+ __u16 sport;
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+ __u16 id;
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+ __u8 tos;
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+ __u8 mc_ttl;
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+ __u8 pmtudisc;
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+ __u8 recverr:1,
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+ is_icsk:1,
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+ freebind:1,
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+ hdrincl:1,
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+ mc_loop:1;
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+ int mc_index;
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+ __u32 mc_addr;
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+ struct ip_mc_socklist *mc_list;
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+ struct {
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+ unsigned int flags;
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+ unsigned int fragsize;
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+ struct ip_options *opt;
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+ struct rtable *rt;
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+ int length; /* Total length of all frames */
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+ u32 addr;
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+ struct flowi fl;
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+ } cork;
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+};
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+
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+#define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */
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+#define IPCORK_ALLFRAG 2 /* always fragment (for ipv6 for now) */
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+
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+static inline struct inet_sock *inet_sk(const struct sock *sk)
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+{
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+ return (struct inet_sock *)sk;
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+}
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+
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+static inline void __inet_sk_copy_descendant(struct sock *sk_to,
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+ const struct sock *sk_from,
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+ const int ancestor_size)
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+{
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+ memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1,
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+ sk_from->sk_prot->obj_size - ancestor_size);
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+}
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+#if !(defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE))
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+static inline void inet_sk_copy_descendant(struct sock *sk_to,
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+ const struct sock *sk_from)
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+{
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+ __inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock));
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+}
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+#endif
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+
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+extern int inet_sk_rebuild_header(struct sock *sk);
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+
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+static inline unsigned int inet_ehashfn(const __u32 laddr, const __u16 lport,
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+ const __u32 faddr, const __u16 fport)
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+{
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+ unsigned int h = (laddr ^ lport) ^ (faddr ^ fport);
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+ h ^= h >> 16;
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+ h ^= h >> 8;
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+ return h;
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+}
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+
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+static inline int inet_sk_ehashfn(const struct sock *sk)
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+{
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+ const struct inet_sock *inet = inet_sk(sk);
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+ const __u32 laddr = inet->rcv_saddr;
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+ const __u16 lport = inet->num;
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+ const __u32 faddr = inet->daddr;
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+ const __u16 fport = inet->dport;
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+
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+ return inet_ehashfn(laddr, lport, faddr, fport);
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+}
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+
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+#endif /* _INET_SOCK_H */
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