D3687.id8816.diff
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	Index: sbin/ifconfig/ifconfig.8
	===================================================================
	--- sbin/ifconfig/ifconfig.8
	+++ sbin/ifconfig/ifconfig.8
	@@ -373,6 +373,8 @@
	and 802.11g
	.Pq Cm 11g
	operating modes.
	+.It Cm txrtlmt
	+Set if the driver supports tx rate limit.
	.It Cm inst Ar minst , Cm instance Ar minst
	Set the media instance to
	.Ar minst .
	Index: sbin/ifconfig/ifconfig.c
	===================================================================
	--- sbin/ifconfig/ifconfig.c
	+++ sbin/ifconfig/ifconfig.c
	@@ -1069,7 +1069,7 @@
	"\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \
	"\10VLAN_HWCSUM\11TSO4\12TSO6\13LRO\14WOL_UCAST\15WOL_MCAST\16WOL_MAGIC" \
	"\17TOE4\20TOE6\21VLAN_HWFILTER\23VLAN_HWTSO\24LINKSTATE\25NETMAP" \
	-"\26RXCSUM_IPV6\27TXCSUM_IPV6"
	+"\26RXCSUM_IPV6\27TXCSUM_IPV6\31TXRTLMT"

	/*
	* Print the status of the interface. If an address family was
	@@ -1377,6 +1377,8 @@
	DEF_CMD("-wol_mcast", -IFCAP_WOL_MCAST, setifcap),
	DEF_CMD("wol_magic", IFCAP_WOL_MAGIC, setifcap),
	DEF_CMD("-wol_magic", -IFCAP_WOL_MAGIC, setifcap),
	+ DEF_CMD("txrtlmt", IFCAP_TXRTLMT, setifcap),
	+ DEF_CMD("-txrtlmt", -IFCAP_TXRTLMT, setifcap),
	DEF_CMD("normal", -IFF_LINK0, setifflags),
	DEF_CMD("compress", IFF_LINK0, setifflags),
	DEF_CMD("noicmp", IFF_LINK1, setifflags),
	Index: sys/conf/NOTES
	===================================================================
	--- sys/conf/NOTES
	+++ sys/conf/NOTES
	@@ -591,6 +591,8 @@
	options INET #Internet communications protocols
	options INET6 #IPv6 communications protocols

	+options RATELIMIT #rate limit support.
	+
	options ROUTETABLES=2 # allocated fibs up to 65536. default is 1.
	# but that would be a bad idea as they are large.

	Index: sys/conf/config.mk
	===================================================================
	--- sys/conf/config.mk
	+++ sys/conf/config.mk
	@@ -10,6 +10,10 @@
	.if !defined(KERNBUILDDIR)
	opt_bpf.h:
	echo "#define DEV_BPF 1" > ${.TARGET}
	+.if ${MK_RATELIMIT} != "no"
	+opt_ratelimit.h:
	+ @echo "#define RATELIMIT 1" > ${.TARGET}
	+.endif
	.if ${MK_INET_SUPPORT} != "no"
	opt_inet.h:
	@echo "#define INET 1" > ${.TARGET}
	Index: sys/conf/kern.opts.mk
	===================================================================
	--- sys/conf/kern.opts.mk
	+++ sys/conf/kern.opts.mk
	@@ -46,6 +46,7 @@
	__DEFAULT_NO_OPTIONS = \
	EISA \
	NAND \
	+ RATELIMIT \
	OFED

	# Some options are totally broken on some architectures. We disable
	Index: sys/conf/options
	===================================================================
	--- sys/conf/options
	+++ sys/conf/options
	@@ -404,6 +404,7 @@
	BOOTP_WIRED_TO opt_bootp.h
	DEVICE_POLLING
	DUMMYNET opt_ipdn.h
	+RATELIMIT
	INET opt_inet.h
	INET6 opt_inet6.h
	IPDIVERT
	Index: sys/kern/uipc_socket.c
	===================================================================
	--- sys/kern/uipc_socket.c
	+++ sys/kern/uipc_socket.c
	@@ -103,6 +103,7 @@
	#include <sys/cdefs.h>
	__FBSDID("$FreeBSD$");

	+#include "opt_ratelimit.h"
	#include "opt_inet.h"
	#include "opt_inet6.h"
	#include "opt_compat.h"
	@@ -2668,6 +2669,18 @@
	#endif
	break;

	+ case SO_MAX_PACING_RATE:
	+#ifdef RATELIMIT
	+ error = sooptcopyin(sopt, &val32, sizeof(val32),
	+ sizeof(val32));
	+ if (error)
	+ goto bad;
	+ so->so_max_pacing_rate = val32;
	+#else
	+ error = EOPNOTSUPP;
	+#endif
	+ break;
	+
	default:
	if (V_socket_hhh[HHOOK_SOCKET_OPT]->hhh_nhooks > 0)
	error = hhook_run_socket(so, sopt,
	@@ -2723,6 +2736,9 @@
	#ifdef MAC
	struct mac extmac;
	#endif
	+#ifdef RATELIMIT
	+ uint32_t val32;
	+#endif

	CURVNET_SET(so->so_vnet);
	error = 0;
	@@ -2843,6 +2859,15 @@
	#endif
	break;

	+ case SO_MAX_PACING_RATE:
	+#ifdef RATELIMIT
	+ val32 = so->so_max_pacing_rate;
	+ error = sooptcopyout(sopt, &val32, sizeof(val32));
	+#else
	+ error = EOPNOTSUPP;
	+#endif
	+ break;
	+
	case SO_LISTENQLIMIT:
	optval = so->so_qlimit;
	goto integer;
	Index: sys/net/if.h
	===================================================================
	--- sys/net/if.h
	+++ sys/net/if.h
	@@ -239,6 +239,7 @@
	#define IFCAP_RXCSUM_IPV6 0x200000 /* can offload checksum on IPv6 RX */
	#define IFCAP_TXCSUM_IPV6 0x400000 /* can offload checksum on IPv6 TX */
	#define IFCAP_HWSTATS 0x800000 /* manages counters internally */
	+#define IFCAP_TXRTLMT 0x1000000 /* hardware supports TX rate limit */

	#define IFCAP_HWCSUM_IPV6 (IFCAP_RXCSUM_IPV6 \| IFCAP_TXCSUM_IPV6)

	@@ -371,6 +372,14 @@
	};

	/*
	+ * Interface to create/delete/modify/get tx rate limit.
	+ */
	+struct ifreq_txrtlmt {
	+ uint32_t txringid_max_rate;
	+ uint32_t txringid;
	+};
	+
	+/*
	* Interface request structure used for socket
	* ioctl's. All interface ioctl's must have parameter
	* definitions which begin with ifr_name. The
	Index: sys/net/if.c
	===================================================================
	--- sys/net/if.c
	+++ sys/net/if.c
	@@ -2601,6 +2601,17 @@
	ifr = (struct ifreq *)data;

	switch (cmd) {
	+ /*
	+ * We want these IOCTLs to be run only inside/by kernel code,
	+ * From a very specific location we kill it here so it won't
	+ * get to hw.
	+ */
	+ case SIOCARATECTL:
	+ case SIOCSRATECTL:
	+ case SIOCDRATECTL:
	+ CURVNET_RESTORE();
	+ return (EOPNOTSUPP);
	+
	#ifdef VIMAGE
	case SIOCSIFRVNET:
	error = priv_check(td, PRIV_NET_SETIFVNET);
	Index: sys/netinet/in_pcb.h
	===================================================================
	--- sys/netinet/in_pcb.h
	+++ sys/netinet/in_pcb.h
	@@ -202,6 +202,9 @@
	uint32_t inp_flowid; /* (x) flow id / queue id */
	u_int inp_refcount; /* (i) refcount */
	void inp_pspare[5]; / (x) route caching / general use */
	+ struct ifnet inp_txringid_ifp; / (i) ifp of ring id */
	+ uint32_t inp_txringid_max_rate; /* (i) driver ring id rate */
	+ uint32_t inp_txringid; /* (i) driver ring id */
	uint32_t inp_flowtype; /* (x) M_HASHTYPE value */
	uint32_t inp_rss_listen_bucket; /* (x) overridden RSS listen bucket */
	u_int inp_ispare[4]; /* (x) route caching / user cookie /
	@@ -728,6 +731,11 @@
	struct sockaddr *
	in_sockaddr(in_port_t port, struct in_addr *addr);
	void in_pcbsosetlabel(struct socket *so);
	+int in_pcbmodify_txrtlmt(struct inpcb *inp, uint32_t max_pacing_rate);
	+int in_pcbattach_txrtlmt(struct inpcb inp, struct ifnet ifp,
	+ uint32_t max_pacing_rate);
	+void in_pcbdetach_txrtlmt(struct inpcb *inp);
	+int in_pcb_getwlock(struct inpcb inp, bool excl);
	#endif /* _KERNEL */

	#endif /* !_NETINET_IN_PCB_H_ */
	Index: sys/netinet/in_pcb.c
	===================================================================
	--- sys/netinet/in_pcb.c
	+++ sys/netinet/in_pcb.c
	@@ -39,6 +39,7 @@
	__FBSDID("$FreeBSD$");

	#include "opt_ddb.h"
	+#include "opt_ratelimit.h"
	#include "opt_ipsec.h"
	#include "opt_inet.h"
	#include "opt_inet6.h"
	@@ -55,6 +56,7 @@
	#include <sys/protosw.h>
	#include <sys/rmlock.h>
	#include <sys/socket.h>
	+#include <sys/sockio.h>
	#include <sys/socketvar.h>
	#include <sys/priv.h>
	#include <sys/proc.h>
	@@ -1138,6 +1140,11 @@

	KASSERT(inp->inp_socket != NULL, ("%s: inp_socket == NULL", __func__));

	+#ifdef RATELIMIT
	+ if (inp->inp_txringid_ifp != NULL)
	+ in_pcbdetach_txrtlmt(inp);
	+#endif
	+
	inp->inp_socket->so_pcb = NULL;
	inp->inp_socket = NULL;
	}
	@@ -2646,3 +2653,124 @@
	db_print_inpcb(inp, "inpcb", 0);
	}
	#endif /* DDB */
	+
	+
	+#ifdef RATELIMIT
	+/*
	+ * Modify existing tx rate limit on inp_txringid_ifp and update inp info.
	+ */
	+int
	+in_pcbmodify_txrtlmt(struct inpcb *inp, uint32_t max_pacing_rate)
	+{
	+ struct ifreq_txrtlmt req;
	+ int error;
	+
	+ INP_WLOCK_ASSERT(inp);
	+ KASSERT(inp->inp_txringid_ifp != NULL,
	+ ("%s: inp_txringid_ifp == NULL", __func__));
	+
	+ req.txringid_max_rate = max_pacing_rate;
	+ req.txringid = inp->inp_txringid;
	+ error = inp->inp_txringid_ifp->if_ioctl(inp->inp_txringid_ifp,
	+ SIOCSRATECTL, (caddr_t)&req);
	+
	+ if (error)
	+ return (error);
	+
	+ inp->inp_txringid_max_rate = max_pacing_rate;
	+ return (0);
	+}
	+
	+/*
	+ * Create a tx rate limit on ifp and attach it to inp
	+ */
	+int
	+in_pcbattach_txrtlmt(struct inpcb inp, struct ifnet ifp,
	+ uint32_t max_pacing_rate)
	+{
	+ struct ifreq_txrtlmt req;
	+ int error;
	+
	+ INP_WLOCK_ASSERT(inp);
	+ KASSERT(inp->inp_txringid_ifp == NULL,
	+ ("%s: inp_txringid_ifp != NULL", __func__));
	+
	+ req.txringid_max_rate = max_pacing_rate;
	+
	+ if_ref(ifp);
	+ error = ifp->if_ioctl(ifp, SIOCARATECTL, (caddr_t)&req);
	+
	+ if (error) {
	+ if_rele(ifp);
	+ return (error);
	+ }
	+
	+ inp->inp_txringid_ifp = ifp;
	+ inp->inp_txringid_max_rate = max_pacing_rate;
	+ inp->inp_txringid = req.txringid;
	+ return (0);
	+}
	+
	+/*
	+ * Remove tx rate limit from inp_txringid_ifp
	+ * and detach it from the in_pcb
	+ */
	+void
	+in_pcbdetach_txrtlmt(struct inpcb *inp)
	+{
	+ struct ifreq_txrtlmt req;
	+ struct ifnet *ifp;
	+
	+ INP_WLOCK_ASSERT(inp);
	+ KASSERT(inp->inp_txringid_ifp != NULL,
	+ ("%s: inp->inp_txringid_ifp == NULL", __func__));
	+
	+ ifp = inp->inp_txringid_ifp;
	+ req.txringid = inp->inp_txringid;
	+
	+ inp->inp_txringid_ifp = NULL;
	+ inp->inp_txringid = 0;
	+ inp->inp_txringid_max_rate = 0;
	+
	+ /*
	+ * If the device went down (module removed)
	+ * while we still had ref to ifp
	+ * we assume if_dead was called
	+ * and replaced callbacks with stubs.
	+ */
	+ ifp->if_ioctl(ifp, SIOCDRATECTL, (caddr_t)&req);
	+ if_rele(ifp);
	+}
	+
	+/*
	+ * Make sure we have wlock on inpcb.
	+ * 1) If we have wlock before calling, on return: *excl unchanged, return status 0.
	+ * 2) If we have read lock and in_pcbfree() wasn't called when we upgraded,
	+ * on return: *excl = false, and return status 1.
	+ * 3) If in_pcbfree() was called when we upgraded, return status -1,
	+ * and return to the same lock status we held before calling
	+ * in_pcb_getwlock (Which means we hold rlock).
	+ */
	+int
	+in_pcb_getwlock(struct inpcb inp, bool excl)
	+{
	+ if (!INP_WLOCKED(inp)) {
	+ *excl = false;
	+ /* shared lock at this point
	+ * try to upgrade, if can't need to drop shared
	+ * and get exclusive lock
	+ */
	+ if (!INP_TRY_UPGRADE(inp)) {
	+ in_pcbref(inp);
	+ INP_RUNLOCK(inp);
	+ INP_WLOCK(inp);
	+ if (in_pcbrele_wlocked(inp)) {
	+ INP_DOWNGRADE(inp);
	+ return (-1);
	+ }
	+ return (1);
	+ }
	+ }
	+ return (0);
	+}
	+#endif /* RATELIMIT */
	Index: sys/netinet/ip_output.c
	===================================================================
	--- sys/netinet/ip_output.c
	+++ sys/netinet/ip_output.c
	@@ -32,6 +32,7 @@
	#include <sys/cdefs.h>
	__FBSDID("$FreeBSD$");

	+#include "opt_ratelimit.h"
	#include "opt_inet.h"
	#include "opt_ipfw.h"
	#include "opt_ipsec.h"
	@@ -231,6 +232,11 @@
	#ifdef IPSEC
	int no_route_but_check_spd = 0;
	#endif
	+#ifdef RATELIMIT
	+ uint32_t max_pacing_rate = 0;
	+ bool excl = true;
	+#endif
	+
	M_ASSERTPKTHDR(m);

	if (inp != NULL) {
	@@ -240,6 +246,16 @@
	m->m_pkthdr.flowid = inp->inp_flowid;
	M_HASHTYPE_SET(m, inp->inp_flowtype);
	}
	+ /*
	+ * We don't need to take a lock here because every mbuf we send
	+ * we check if max_pacing_rate is set,
	+ * even if we read incorrect value at first,
	+ * eventually we will get the right value.
	+ */
	+#ifdef RATELIMIT
	+ if (inp->inp_socket != NULL)
	+ max_pacing_rate = inp->inp_socket->so_max_pacing_rate;
	+#endif
	}

	if (ro == NULL) {
	@@ -598,6 +614,68 @@
	}
	#endif

	+#ifdef RATELIMIT
	+ /*
	+ * Check for HW pacing capability of the interface, if present
	+ * set flowid and rsstype on the mbuf If inp->inp_socket ==
	+ * NULL , the last bits of communication just want to get over
	+ * with this connection, don't care about pacing
	+ */
	+check_pacing:
	+ if (inp != NULL && inp->inp_socket != NULL &&
	+ (max_pacing_rate \|\| inp->inp_txringid_ifp != NULL) &&
	+ (ifp->if_capabilities & IFCAP_TXRTLMT)) {
	+
	+ /*
	+ * Note that if we have ref of ifp, a new ifp can't be
	+ * created at the same memory address of the old ifp. this
	+ * lets us insure that if we transmit on one interface
	+ * and its module is unloaded and then loaded, we
	+ * won't try to transmit on a invalid ring on the
	+ * new ifp, but first we delete the ring on the old
	+ * ifp, and then will create a new one on the new ifp.
	+ */
	+ if (ifp != inp->inp_txringid_ifp) {
	+
	+ error = in_pcb_getwlock(inp, &excl);
	+ if (error == -1)
	+ goto bad;
	+ if (error)
	+ goto check_pacing;
	+ if (inp->inp_txringid_ifp != NULL)
	+ in_pcbdetach_txrtlmt(inp);
	+
	+ error = in_pcbattach_txrtlmt(inp, ifp,
	+ max_pacing_rate);
	+ if (error) {
	+ inp->inp_socket->so_max_pacing_rate = 0;
	+ goto done_pacing;
	+ }
	+ } else if (inp->inp_txringid_max_rate != max_pacing_rate) {
	+
	+ error = in_pcb_getwlock(inp, &excl);
	+ if (error == -1)
	+ goto bad;
	+ if (error)
	+ goto check_pacing;
	+
	+ error = in_pcbmodify_txrtlmt(inp, max_pacing_rate);
	+ if (error) {
	+ inp->inp_socket->so_max_pacing_rate = 0;
	+ goto done_pacing;
	+ }
	+ }
	+
	+ m->m_pkthdr.flowid = inp->inp_txringid;
	+ M_HASHTYPE_SET(m, M_HASHTYPE_TXRTLMT);
	+ }
	+done_pacing:
	+ if (!excl) {
	+ excl = true;
	+ INP_DOWNGRADE(inp);
	+ }
	+#endif /* RATELIMIT */
	+
	/*
	* If small enough for interface, or the interface will take
	* care of the fragmentation for us, we can just send directly.
	Index: sys/netinet6/ip6_output.c
	===================================================================
	--- sys/netinet6/ip6_output.c
	+++ sys/netinet6/ip6_output.c
	@@ -63,6 +63,7 @@
	#include <sys/cdefs.h>
	__FBSDID("$FreeBSD$");

	+#include "opt_ratelimit.h"
	#include "opt_inet.h"
	#include "opt_inet6.h"
	#include "opt_ipfw.h"
	@@ -318,6 +319,10 @@
	uint32_t fibnum;
	struct m_tag *fwd_tag = NULL;
	uint32_t id;
	+#ifdef RATELIMIT
	+ uint32_t max_pacing_rate = 0;
	+ bool excl = true;
	+#endif

	ip6 = mtod(m, struct ip6_hdr *);
	if (ip6 == NULL) {
	@@ -332,6 +337,16 @@
	m->m_pkthdr.flowid = inp->inp_flowid;
	M_HASHTYPE_SET(m, inp->inp_flowtype);
	}
	+ /*
	+ * We don't need to take a lock here because every mbuf we send
	+ * we check if max_pacing_rate is set,
	+ * even if we read incorrect value at first,
	+ * eventually we will get the right value.
	+ */
	+#ifdef RATELIMIT
	+ if (inp->inp_socket != NULL)
	+ max_pacing_rate = inp->inp_socket->so_max_pacing_rate;
	+#endif
	}

	finaldst = ip6->ip6_dst;
	@@ -920,6 +935,68 @@
	goto bad;
	}

	+#ifdef RATELIMIT
	+ /*
	+ * Check for HW pacing capability of the interface, if present
	+ * set flowid and rsstype on the mbuf If inp->inp_socket ==
	+ * NULL , the last bits of communication just want to get over
	+ * with this connection, don't care about pacing
	+ */
	+check_pacing:
	+ if (inp != NULL && inp->inp_socket != NULL &&
	+ (max_pacing_rate \|\| inp->inp_txringid_ifp != NULL) &&
	+ (ifp->if_capabilities & IFCAP_TXRTLMT)) {
	+
	+ /*
	+ * Note that if we have ref of ifp, a new ifp can't be
	+ * created at the same memory address of the old ifp. this
	+ * lets us insure that if we transmit on one interface
	+ * and its module is unloaded and then loaded, we
	+ * won't try to transmit on a none valid ring on the
	+ * new ifp, but first we delete the ring on the old
	+ * ifp, and then will create a new one on the new ifp.
	+ */
	+ if (ifp != inp->inp_txringid_ifp) {
	+
	+ error = in_pcb_getwlock(inp, &excl);
	+ if (error == -1)
	+ goto bad;
	+ if (error)
	+ goto check_pacing;
	+ if (inp->inp_txringid_ifp != NULL)
	+ in_pcbdetach_txrtlmt(inp);
	+
	+ error = in_pcbattach_txrtlmt(inp, ifp,
	+ max_pacing_rate);
	+ if (error) {
	+ inp->inp_socket->so_max_pacing_rate = 0;
	+ goto done_pacing;
	+ }
	+ } else if (inp->inp_txringid_max_rate != max_pacing_rate) {
	+
	+ error = in_pcb_getwlock(inp, &excl);
	+ if (error == -1)
	+ goto bad;
	+ if (error)
	+ goto check_pacing;
	+
	+ error = in_pcbmodify_txrtlmt(inp, max_pacing_rate);
	+ if (error) {
	+ inp->inp_socket->so_max_pacing_rate = 0;
	+ goto done_pacing;
	+ }
	+ }
	+
	+ m->m_pkthdr.flowid = inp->inp_txringid;
	+ M_HASHTYPE_SET(m, M_HASHTYPE_TXRTLMT);
	+ }
	+done_pacing:
	+ if (!excl) {
	+ excl = true;
	+ INP_DOWNGRADE(inp);
	+ }
	+#endif /* RATELIMIT */
	+
	/*
	* transmit packet without fragmentation
	*/
	Index: sys/sys/mbuf.h
	===================================================================
	--- sys/sys/mbuf.h
	+++ sys/sys/mbuf.h
	@@ -304,6 +304,7 @@
	#define M_HASHTYPE_RSS_UDP_IPV4_EX 8 /* IPv4 UDP 4-tuple + ext hdrs */
	#define M_HASHTYPE_RSS_UDP_IPV6 9 /* IPv6 UDP 4-tuple */
	#define M_HASHTYPE_RSS_UDP_IPV6_EX 10 /* IPv6 UDP 4-tuple + ext hdrs */
	+#define M_HASHTYPE_TXRTLMT 11 /* rate limit tx traffic */

	#define M_HASHTYPE_OPAQUE 255 /* ordering, not affinity */

	Index: sys/sys/socket.h
	===================================================================
	--- sys/sys/socket.h
	+++ sys/sys/socket.h
	@@ -157,6 +157,7 @@
	#define SO_SETFIB 0x1014 /* use this FIB to route */
	#define SO_USER_COOKIE 0x1015 /* user cookie (dummynet etc.) */
	#define SO_PROTOCOL 0x1016 /* get socket protocol (Linux name) */
	+#define SO_MAX_PACING_RATE 0x1017 /* set max pacing rate per socket */
	#define SO_PROTOTYPE SO_PROTOCOL /* alias for SO_PROTOCOL (SunOS name) */
	#endif

	Index: sys/sys/socketvar.h
	===================================================================
	--- sys/sys/socketvar.h
	+++ sys/sys/socketvar.h
	@@ -80,6 +80,7 @@
	void so_pcb; / protocol control block */
	struct vnet so_vnet; / (a) network stack instance */
	struct protosw so_proto; / (a) protocol handle */
	+ uint32_t so_max_pacing_rate; /* (f) pacing rate info */
	/*
	* Variables for connection queuing.
	* Socket where accepts occur is so_head in all subsidiary sockets.
	Index: sys/sys/sockio.h
	===================================================================
	--- sys/sys/sockio.h
	+++ sys/sys/sockio.h
	@@ -133,4 +133,8 @@
	#define SIOCGIFGMEMB _IOWR('i', 138, struct ifgroupreq) /* get members */
	#define SIOCGIFXMEDIA _IOWR('i', 139, struct ifmediareq) /* get net xmedia */

	+#define SIOCARATECTL _IOWR('i', 139, struct ifreq_txrtlmt) /* add tx rate limit */
	+#define SIOCSRATECTL _IOWR('i', 140, struct ifreq_txrtlmt) /* set tx rate limit */
	+#define SIOCDRATECTL _IOW('i', 141, struct ifreq_txrtlmt) /* del tx rate limit */
	+
	#endif /* !_SYS_SOCKIO_H_ */

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