/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2011 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
* @(#)tcp_subr.c 8.2 (Berkeley) 5/24/95
* $FreeBSD: src/sys/netinet/tcp_subr.c,v 1.73.2.22 2001/08/22 00:59:12 silby Exp $
*/
-
+/*
+ * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
+ * support for mandatory and extensible security protections. This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
-#if INET6
#include <sys/domain.h>
-#endif
#include <sys/proc.h>
#include <sys/kauth.h>
#include <sys/socket.h>
#include <sys/protosw.h>
#include <sys/random.h>
#include <sys/syslog.h>
+#include <sys/mcache.h>
#include <kern/locks.h>
-
-
+#include <kern/zalloc.h>
#include <net/route.h>
#include <net/if.h>
+#define tcp_minmssoverload fring
#define _IP_VHL
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
+#include <netinet/ip_icmp.h>
#if INET6
#include <netinet/ip6.h>
#endif
#endif
#include <netinet/in_var.h>
#include <netinet/ip_var.h>
+#include <netinet/icmp_var.h>
#if INET6
#include <netinet6/ip6_var.h>
#endif
#include <netinet/tcp_seq.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
+#include <netinet/tcp_cc.h>
+#include <kern/thread_call.h>
+
#if INET6
#include <netinet6/tcp6_var.h>
#endif
#endif
#endif /*IPSEC*/
-#include <sys/md5.h>
+#undef tcp_minmssoverload
+
+#if CONFIG_MACF_NET
+#include <security/mac_framework.h>
+#endif /* MAC_NET */
+
+#include <libkern/crypto/md5.h>
#include <sys/kdebug.h>
+#include <mach/sdt.h>
#define DBG_FNC_TCP_CLOSE NETDBG_CODE(DBG_NETTCP, ((5 << 8) | 2))
/* temporary: for testing */
#if IPSEC
extern int ipsec_bypass;
-extern lck_mtx_t *sadb_mutex;
#endif
int tcp_mssdflt = TCP_MSS;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_MSSDFLT, mssdflt, CTLFLAG_RW,
+SYSCTL_INT(_net_inet_tcp, TCPCTL_MSSDFLT, mssdflt, CTLFLAG_RW | CTLFLAG_LOCKED,
&tcp_mssdflt , 0, "Default TCP Maximum Segment Size");
#if INET6
int tcp_v6mssdflt = TCP6_MSS;
SYSCTL_INT(_net_inet_tcp, TCPCTL_V6MSSDFLT, v6mssdflt,
- CTLFLAG_RW, &tcp_v6mssdflt , 0,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_v6mssdflt , 0,
"Default TCP Maximum Segment Size for IPv6");
#endif
* checking. This setting prevents us from sending too small packets.
*/
int tcp_minmss = TCP_MINMSS;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, minmss, CTLFLAG_RW,
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, minmss, CTLFLAG_RW | CTLFLAG_LOCKED,
&tcp_minmss , 0, "Minmum TCP Maximum Segment Size");
/*
#else
__private_extern__ int tcp_minmssoverload = 0;
#endif
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, minmssoverload, CTLFLAG_RW,
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, minmssoverload, CTLFLAG_RW | CTLFLAG_LOCKED,
&tcp_minmssoverload , 0, "Number of TCP Segments per Second allowed to"
"be under the MINMSS Size");
static int tcp_do_rfc1323 = 1;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1323, rfc1323, CTLFLAG_RW,
+SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1323, rfc1323, CTLFLAG_RW | CTLFLAG_LOCKED,
&tcp_do_rfc1323 , 0, "Enable rfc1323 (high performance TCP) extensions");
+// Not used
static int tcp_do_rfc1644 = 0;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1644, rfc1644, CTLFLAG_RW,
+SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1644, rfc1644, CTLFLAG_RW | CTLFLAG_LOCKED,
&tcp_do_rfc1644 , 0, "Enable rfc1644 (TTCP) extensions");
-static int tcp_tcbhashsize = 0;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, tcbhashsize, CTLFLAG_RD,
- &tcp_tcbhashsize, 0, "Size of TCP control-block hashtable");
-
static int do_tcpdrain = 0;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, do_tcpdrain, CTLFLAG_RW, &do_tcpdrain, 0,
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, do_tcpdrain, CTLFLAG_RW | CTLFLAG_LOCKED, &do_tcpdrain, 0,
"Enable tcp_drain routine for extra help when low on mbufs");
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, pcbcount, CTLFLAG_RD,
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, pcbcount, CTLFLAG_RD | CTLFLAG_LOCKED,
&tcbinfo.ipi_count, 0, "Number of active PCBs");
static int icmp_may_rst = 1;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, icmp_may_rst, CTLFLAG_RW, &icmp_may_rst, 0,
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, icmp_may_rst, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp_may_rst, 0,
"Certain ICMP unreachable messages may abort connections in SYN_SENT");
static int tcp_strict_rfc1948 = 0;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, strict_rfc1948, CTLFLAG_RW,
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, strict_rfc1948, CTLFLAG_RW | CTLFLAG_LOCKED,
&tcp_strict_rfc1948, 0, "Determines if RFC1948 is followed exactly");
static int tcp_isn_reseed_interval = 0;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, isn_reseed_interval, CTLFLAG_RW,
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, isn_reseed_interval, CTLFLAG_RW | CTLFLAG_LOCKED,
&tcp_isn_reseed_interval, 0, "Seconds between reseeding of ISN secret");
+static int tcp_background_io_enabled = 1;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, background_io_enabled, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &tcp_background_io_enabled, 0, "Background IO Enabled");
+
+int tcp_TCPTV_MIN = 100; /* 100ms minimum RTT */
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, rtt_min, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &tcp_TCPTV_MIN, 0, "min rtt value allowed");
+
+int tcp_rexmt_slop = TCPTV_REXMTSLOP;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, rexmt_slop, CTLFLAG_RW,
+ &tcp_rexmt_slop, 0, "Slop added to retransmit timeout");
+
+__private_extern__ int tcp_use_randomport = 0;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, randomize_ports, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &tcp_use_randomport, 0, "Randomize TCP port numbers");
+
+extern struct tcp_cc_algo tcp_cc_newreno;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, newreno_sockets, CTLFLAG_RD | CTLFLAG_LOCKED,
+ &tcp_cc_newreno.num_sockets, 0, "Number of sockets using newreno");
+
+extern struct tcp_cc_algo tcp_cc_ledbat;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, background_sockets, CTLFLAG_RD | CTLFLAG_LOCKED,
+ &tcp_cc_ledbat.num_sockets, 0, "Number of sockets using background transport");
static void tcp_cleartaocache(void);
static void tcp_notify(struct inpcb *, int);
+static void tcp_cc_init(void);
+
struct zone *sack_hole_zone;
+struct zone *tcp_reass_zone;
+
+/* The array containing pointers to currently implemented TCP CC algorithms */
+struct tcp_cc_algo* tcp_cc_algo_list[TCP_CC_ALGO_COUNT];
+
+extern unsigned int total_mb_cnt;
+extern unsigned int total_cl_cnt;
+extern int sbspace_factor;
+extern int tcp_sockthreshold;
+extern int slowlink_wsize; /* window correction for slow links */
+extern int path_mtu_discovery;
+
/*
* Target size of TCP PCB hash tables. Must be a power of two.
* variable net.inet.tcp.tcbhashsize
*/
#ifndef TCBHASHSIZE
-#define TCBHASHSIZE 4096
+#define TCBHASHSIZE CONFIG_TCBHASHSIZE
#endif
+__private_extern__ int tcp_tcbhashsize = TCBHASHSIZE;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, tcbhashsize, CTLFLAG_RD | CTLFLAG_LOCKED,
+ &tcp_tcbhashsize, 0, "Size of TCP control-block hashtable");
+
/*
* This is the actual shape of what we allocate using the zone
* allocator. Doing it this way allows us to protect both structures
* to be changed, eventually, for greater efficiency).
*/
#define ALIGNMENT 32
-#define ALIGNM1 (ALIGNMENT - 1)
struct inp_tp {
- union {
- struct inpcb inp;
- char align[(sizeof(struct inpcb) + ALIGNM1) & ~ALIGNM1];
- } inp_tp_u;
- struct tcpcb tcb;
+ struct inpcb inp;
+ struct tcpcb tcb __attribute__((aligned(ALIGNMENT)));
};
#undef ALIGNMENT
-#undef ALIGNM1
-static struct tcpcb dummy_tcb;
+extern struct inpcbhead time_wait_slots[];
+extern struct tcptimerlist tcp_timer_list;
+
+int get_inpcb_str_size(void);
+int get_tcp_str_size(void);
+static void tcpcb_to_otcpcb(struct tcpcb *, struct otcpcb *);
-extern struct inpcbhead time_wait_slots[];
-extern int cur_tw_slot;
-extern u_long *delack_bitmask;
-extern u_long route_generation;
+static lck_attr_t *tcp_uptime_mtx_attr = NULL; /* mutex attributes */
+static lck_grp_t *tcp_uptime_mtx_grp = NULL; /* mutex group definition */
+static lck_grp_attr_t *tcp_uptime_mtx_grp_attr = NULL; /* mutex group attributes */
-int get_inpcb_str_size()
+int get_inpcb_str_size(void)
{
return sizeof(struct inpcb);
}
-int get_tcp_str_size()
+int get_tcp_str_size(void)
{
return sizeof(struct tcpcb);
}
int tcp_freeq(struct tcpcb *tp);
+/*
+ * Initialize TCP congestion control algorithms.
+ */
+
+void
+tcp_cc_init(void)
+{
+ bzero(&tcp_cc_algo_list, sizeof(tcp_cc_algo_list));
+ tcp_cc_algo_list[TCP_CC_ALGO_NEWRENO_INDEX] = &tcp_cc_newreno;
+ tcp_cc_algo_list[TCP_CC_ALGO_BACKGROUND_INDEX] = &tcp_cc_ledbat;
+}
/*
* Tcp initialization
void
tcp_init()
{
- int hashsize = TCBHASHSIZE;
vm_size_t str_size;
int i;
struct inpcbinfo *pcbinfo;
tcp_ccgen = 1;
tcp_cleartaocache();
- tcp_delacktime = TCPTV_DELACK;
tcp_keepinit = TCPTV_KEEP_INIT;
tcp_keepidle = TCPTV_KEEP_IDLE;
tcp_keepintvl = TCPTV_KEEPINTVL;
tcp_maxpersistidle = TCPTV_KEEP_IDLE;
tcp_msl = TCPTV_MSL;
- read_random(&tcp_now, sizeof(tcp_now));
- tcp_now = tcp_now & 0x7fffffff; /* Starts tcp internal 500ms clock at a random value */
+ microuptime(&tcp_uptime);
+ read_random(&tcp_now, sizeof(tcp_now));
+ tcp_now = tcp_now & 0x3fffffff; /* Starts tcp internal clock at a random value */
LIST_INIT(&tcb);
tcbinfo.listhead = &tcb;
pcbinfo = &tcbinfo;
- if (!powerof2(hashsize)) {
+ if (!powerof2(tcp_tcbhashsize)) {
printf("WARNING: TCB hash size not a power of 2\n");
- hashsize = 512; /* safe default */
+ tcp_tcbhashsize = 512; /* safe default */
}
- tcp_tcbhashsize = hashsize;
- tcbinfo.hashsize = hashsize;
- tcbinfo.hashbase = hashinit(hashsize, M_PCB, &tcbinfo.hashmask);
- tcbinfo.porthashbase = hashinit(hashsize, M_PCB,
+ tcbinfo.hashsize = tcp_tcbhashsize;
+ tcbinfo.hashbase = hashinit(tcp_tcbhashsize, M_PCB, &tcbinfo.hashmask);
+ tcbinfo.porthashbase = hashinit(tcp_tcbhashsize, M_PCB,
&tcbinfo.porthashmask);
- str_size = (vm_size_t) sizeof(struct inp_tp);
+ str_size = P2ROUNDUP(sizeof(struct inp_tp), sizeof(u_int64_t));
tcbinfo.ipi_zone = (void *) zinit(str_size, 120000*str_size, 8192, "tcpcb");
+ zone_change(tcbinfo.ipi_zone, Z_CALLERACCT, FALSE);
+ zone_change(tcbinfo.ipi_zone, Z_EXPAND, TRUE);
+
+ str_size = P2ROUNDUP(sizeof(struct sackhole), sizeof(u_int64_t));
sack_hole_zone = zinit(str_size, 120000*str_size, 8192, "sack_hole zone");
+ zone_change(sack_hole_zone, Z_CALLERACCT, FALSE);
+ zone_change(sack_hole_zone, Z_EXPAND, TRUE);
+
tcp_reass_maxseg = nmbclusters / 16;
+ str_size = P2ROUNDUP(sizeof(struct tseg_qent), sizeof(u_int64_t));
+ tcp_reass_zone = zinit(str_size, (tcp_reass_maxseg + 1) * str_size,
+ 0, "tcp_reass_zone");
+ if (tcp_reass_zone == NULL) {
+ panic("%s: failed allocating tcp_reass_zone", __func__);
+ /* NOTREACHED */
+ }
+ zone_change(tcp_reass_zone, Z_CALLERACCT, FALSE);
+ zone_change(tcp_reass_zone, Z_EXPAND, TRUE);
#if INET6
#define TCP_MINPROTOHDR (sizeof(struct ip6_hdr) + sizeof(struct tcphdr))
if (max_linkhdr + TCP_MINPROTOHDR > MHLEN)
panic("tcp_init");
#undef TCP_MINPROTOHDR
- dummy_tcb.t_state = TCP_NSTATES;
- dummy_tcb.t_flags = 0;
- tcbinfo.dummy_cb = (caddr_t) &dummy_tcb;
- /*
+ /*
* allocate lock group attribute and group for tcp pcb mutexes
*/
- pcbinfo->mtx_grp_attr = lck_grp_attr_alloc_init();
- lck_grp_attr_setdefault(pcbinfo->mtx_grp_attr);
+ pcbinfo->mtx_grp_attr = lck_grp_attr_alloc_init();
pcbinfo->mtx_grp = lck_grp_alloc_init("tcppcb", pcbinfo->mtx_grp_attr);
/*
* allocate the lock attribute for tcp pcb mutexes
*/
pcbinfo->mtx_attr = lck_attr_alloc_init();
- lck_attr_setdefault(pcbinfo->mtx_attr);
if ((pcbinfo->mtx = lck_rw_alloc_init(pcbinfo->mtx_grp, pcbinfo->mtx_attr)) == NULL) {
printf("tcp_init: mutex not alloced!\n");
return; /* pretty much dead if this fails... */
}
-
- in_pcb_nat_init(&tcbinfo, AF_INET, IPPROTO_TCP, SOCK_STREAM);
-
- delack_bitmask = _MALLOC((4 * hashsize)/32, M_PCB, M_WAITOK);
- if (delack_bitmask == 0)
- panic("Delack Memory");
-
- for (i=0; i < (tcbinfo.hashsize / 32); i++)
- delack_bitmask[i] = 0;
-
for (i=0; i < N_TIME_WAIT_SLOTS; i++) {
LIST_INIT(&time_wait_slots[i]);
}
+
+ bzero(&tcp_timer_list, sizeof(tcp_timer_list));
+ LIST_INIT(&tcp_timer_list.lhead);
+ /*
+ * allocate lock group attribute, group and attribute for the tcp timer list
+ */
+ tcp_timer_list.mtx_grp_attr = lck_grp_attr_alloc_init();
+ tcp_timer_list.mtx_grp = lck_grp_alloc_init("tcptimerlist", tcp_timer_list.mtx_grp_attr);
+ tcp_timer_list.mtx_attr = lck_attr_alloc_init();
+ if ((tcp_timer_list.mtx = lck_mtx_alloc_init(tcp_timer_list.mtx_grp, tcp_timer_list.mtx_attr)) == NULL) {
+ panic("failed to allocate memory for tcp_timer_list.mtx\n");
+ };
+ tcp_timer_list.fast_quantum = TCP_FASTTIMER_QUANTUM;
+ tcp_timer_list.slow_quantum = TCP_SLOWTIMER_QUANTUM;
+ if ((tcp_timer_list.call = thread_call_allocate(tcp_run_timerlist, NULL)) == NULL) {
+ panic("failed to allocate call entry 1 in tcp_init\n");
+ }
+
+ /*
+ * allocate lock group attribute, group and attribute for tcp_uptime_lock
+ */
+ tcp_uptime_mtx_grp_attr = lck_grp_attr_alloc_init();
+ tcp_uptime_mtx_grp = lck_grp_alloc_init("tcpuptime", tcp_uptime_mtx_grp_attr);
+ tcp_uptime_mtx_attr = lck_attr_alloc_init();
+ tcp_uptime_lock = lck_spin_alloc_init(tcp_uptime_mtx_grp, tcp_uptime_mtx_attr);
+
+ /* Initialize TCP congestion control algorithms list */
+ tcp_cc_init();
}
/*
ip6->ip6_plen = sizeof(struct tcphdr);
ip6->ip6_src = inp->in6p_laddr;
ip6->ip6_dst = inp->in6p_faddr;
- tcp_hdr->th_sum = 0;
+ tcp_hdr->th_sum = in6_cksum_phdr(&inp->in6p_laddr,
+ &inp->in6p_faddr, htonl(sizeof(struct tcphdr)),
+ htonl(IPPROTO_TCP));
} else
#endif
{
* NOTE: If m != NULL, then ti must point to *inside* the mbuf.
*/
void
-tcp_respond(tp, ipgen, th, m, ack, seq, flags)
- struct tcpcb *tp;
- void *ipgen;
- register struct tcphdr *th;
- register struct mbuf *m;
- tcp_seq ack, seq;
- int flags;
+tcp_respond(
+ struct tcpcb *tp,
+ void *ipgen,
+ register struct tcphdr *th,
+ register struct mbuf *m,
+ tcp_seq ack,
+ tcp_seq seq,
+ int flags,
+ unsigned int ifscope,
+ unsigned int nocell
+ )
{
register int tlen;
int win = 0;
struct ip6_hdr *ip6;
int isipv6;
#endif /* INET6 */
- int ipflags = 0;
+ unsigned int outif;
#if INET6
isipv6 = IP_VHL_V(((struct ip *)ipgen)->ip_vhl) == 6;
if (tp) {
if (!(flags & TH_RST)) {
- win = sbspace(&tp->t_inpcb->inp_socket->so_rcv);
- if (win > (long)TCP_MAXWIN << tp->rcv_scale)
- win = (long)TCP_MAXWIN << tp->rcv_scale;
+ win = tcp_sbspace(tp);
+ if (win > (int32_t)TCP_MAXWIN << tp->rcv_scale)
+ win = (int32_t)TCP_MAXWIN << tp->rcv_scale;
}
#if INET6
if (isipv6)
}
}
if (m == 0) {
- m = m_gethdr(M_DONTWAIT, MT_HEADER);
+ m = m_gethdr(M_DONTWAIT, MT_HEADER); /* MAC-OK */
if (m == NULL)
return;
tlen = 0;
m->m_len = tlen;
m->m_pkthdr.len = tlen;
m->m_pkthdr.rcvif = 0;
+#if CONFIG_MACF_NET
+ if (tp != NULL && tp->t_inpcb != NULL) {
+ /*
+ * Packet is associated with a socket, so allow the
+ * label of the response to reflect the socket label.
+ */
+ mac_mbuf_label_associate_inpcb(tp->t_inpcb, m);
+ } else {
+ /*
+ * Packet is not associated with a socket, so possibly
+ * update the label in place.
+ */
+ mac_netinet_tcp_reply(m);
+ }
+#endif
+
nth->th_seq = htonl(seq);
nth->th_ack = htonl(ack);
nth->th_x2 = 0;
#if INET6
if (isipv6) {
nth->th_sum = 0;
- nth->th_sum = in6_cksum(m, IPPROTO_TCP,
- sizeof(struct ip6_hdr),
- tlen - sizeof(struct ip6_hdr));
+ nth->th_sum = in6_cksum_phdr(&ip6->ip6_src,
+ &ip6->ip6_dst, htons((u_short)(tlen - sizeof(struct ip6_hdr))),
+ htonl(IPPROTO_TCP));
+ m->m_pkthdr.csum_flags = CSUM_TCPIPV6;
+ m->m_pkthdr.csum_data = offsetof(struct tcphdr, th_sum);
ip6->ip6_hlim = in6_selecthlim(tp ? tp->t_inpcb : NULL,
ro6 && ro6->ro_rt ?
ro6->ro_rt->rt_ifp :
return;
}
#endif
+
+ if (tp != NULL)
+ set_packet_tclass(m, tp->t_inpcb->inp_socket, MBUF_TC_UNSPEC, isipv6);
+
#if INET6
if (isipv6) {
- (void)ip6_output(m, NULL, ro6, ipflags, NULL, NULL, 0);
- if (ro6 == &sro6 && ro6->ro_rt) {
- rtfree(ro6->ro_rt);
- ro6->ro_rt = NULL;
+ struct ip6_out_args ip6oa = { ifscope, nocell };
+
+ (void) ip6_output(m, NULL, ro6, IPV6_OUTARGS, NULL,
+ NULL, &ip6oa);
+ if (ro6->ro_rt != NULL) {
+ if (ro6 == &sro6) {
+ rtfree(ro6->ro_rt);
+ ro6->ro_rt = NULL;
+ } else if ((outif = ro6->ro_rt->rt_ifp->if_index) !=
+ tp->t_inpcb->in6p_last_outif) {
+ tp->t_inpcb->in6p_last_outif = outif;
+ }
}
} else
#endif /* INET6 */
{
- (void) ip_output_list(m, 0, NULL, ro, ipflags, NULL);
- if (ro == &sro && ro->ro_rt) {
- rtfree(ro->ro_rt);
- ro->ro_rt = NULL;
+ struct ip_out_args ipoa = { ifscope, nocell };
+
+ if (ro != &sro) {
+ /* Copy the cached route and take an extra reference */
+ inp_route_copyout(tp->t_inpcb, &sro);
+ }
+ /*
+ * For consistency, pass a local route copy.
+ */
+ (void) ip_output(m, NULL, &sro, IP_OUTARGS, NULL, &ipoa);
+
+ if (ro != &sro) {
+ if (sro.ro_rt != NULL &&
+ (outif = sro.ro_rt->rt_ifp->if_index) !=
+ tp->t_inpcb->inp_last_outif)
+ tp->t_inpcb->inp_last_outif = outif;
+ /* Synchronize cached PCB route */
+ inp_route_copyin(tp->t_inpcb, &sro);
+ } else if (sro.ro_rt != NULL) {
+ rtfree(sro.ro_rt);
}
}
}
int isipv6 = (inp->inp_vflag & INP_IPV6) != 0;
#endif /* INET6 */
+ calculate_tcp_clock();
+
if (so->cached_in_sock_layer == 0) {
it = (struct inp_tp *)inp;
tp = &it->tcb;
}
else
tp = (struct tcpcb *) inp->inp_saved_ppcb;
-
+
bzero((char *) tp, sizeof(struct tcpcb));
LIST_INIT(&tp->t_segq);
tp->t_maxseg = tp->t_maxopd =
*/
tp->t_srtt = TCPTV_SRTTBASE;
tp->t_rttvar = ((TCPTV_RTOBASE - TCPTV_SRTTBASE) << TCP_RTTVAR_SHIFT) / 4;
- tp->t_rttmin = TCPTV_MIN;
+ tp->t_rttmin = tcp_TCPTV_MIN;
tp->t_rxtcur = TCPTV_RTOBASE;
+
+ /* Initialize congestion control algorithm for this connection
+ * to newreno by default
+ */
+ tp->tcp_cc_index = TCP_CC_ALGO_NEWRENO_INDEX;
+ if (CC_ALGO(tp)->init != NULL) {
+ CC_ALGO(tp)->init(tp);
+ }
+
tp->snd_cwnd = TCP_MAXWIN << TCP_MAX_WINSHIFT;
+ tp->snd_bwnd = TCP_MAXWIN << TCP_MAX_WINSHIFT;
tp->snd_ssthresh = TCP_MAXWIN << TCP_MAX_WINSHIFT;
- tp->t_rcvtime = 0;
+ tp->snd_ssthresh_prev = TCP_MAXWIN << TCP_MAX_WINSHIFT;
+ tp->t_rcvtime = tcp_now;
+ tp->t_bw_rtttime = 0;
+ tp->tentry.timer_start = tcp_now;
+ tp->t_persist_timeout = tcp_max_persist_timeout;
+ tp->t_persist_stop = 0;
+ tp->t_flagsext |= TF_RCVUNACK_WAITSS;
/*
* IPv4 TTL initialization is necessary for an IPv6 socket as well,
* because the socket may be bound to an IPv6 wildcard address,
int errno;
{
struct socket *so = tp->t_inpcb->inp_socket;
-
+#if CONFIG_DTRACE
+ struct inpcb *inp = tp->t_inpcb;
+#endif /* CONFIG_DTRACE */
+
if (TCPS_HAVERCVDSYN(tp->t_state)) {
+ DTRACE_TCP4(state__change, void, NULL, struct inpcb *, inp,
+ struct tcpcb *, tp, int32_t, TCPS_CLOSED);
tp->t_state = TCPS_CLOSED;
(void) tcp_output(tp);
tcpstat.tcps_drops++;
#if INET6
int isipv6 = (inp->inp_vflag & INP_IPV6) != 0;
#endif /* INET6 */
- register struct rtentry *rt;
+ struct rtentry *rt;
int dosavessthresh;
if ( inp->inp_ppcb == NULL) /* tcp_close was called previously, bail */
- return NULL;
+ return(NULL);
- /* Clear the timers before we delete the PCB. */
- {
- int i;
- for (i = 0; i < TCPT_NTIMERS; i++) {
- tp->t_timer[i] = 0;
- }
+ tcp_canceltimers(tp);
+ KERNEL_DEBUG(DBG_FNC_TCP_CLOSE | DBG_FUNC_START, tp,0,0,0,0);
+
+ /*
+ * If another thread for this tcp is currently in ip (indicated by
+ * the TF_SENDINPROG flag), defer the cleanup until after it returns
+ * back to tcp. This is done to serialize the close until after all
+ * pending output is finished, in order to avoid having the PCB be
+ * detached and the cached route cleaned, only for ip to cache the
+ * route back into the PCB again. Note that we've cleared all the
+ * timers at this point. Set TF_CLOSING to indicate to tcp_output()
+ * that is should call us again once it returns from ip; at that
+ * point both flags should be cleared and we can proceed further
+ * with the cleanup.
+ */
+ if (tp->t_flags & (TF_CLOSING|TF_SENDINPROG)) {
+ tp->t_flags |= TF_CLOSING;
+ return (NULL);
}
- KERNEL_DEBUG(DBG_FNC_TCP_CLOSE | DBG_FUNC_START, tp,0,0,0,0);
- switch (tp->t_state)
- {
- case TCPS_ESTABLISHED:
- case TCPS_FIN_WAIT_1:
- case TCPS_CLOSING:
- case TCPS_CLOSE_WAIT:
- case TCPS_LAST_ACK:
- break;
+ if (CC_ALGO(tp)->cleanup != NULL) {
+ CC_ALGO(tp)->cleanup(tp);
}
+#if INET6
+ rt = isipv6 ? inp->in6p_route.ro_rt : inp->inp_route.ro_rt;
+#else
+ rt = inp->inp_route.ro_rt;
+#endif
+ if (rt != NULL)
+ RT_LOCK_SPIN(rt);
/*
* If we got enough samples through the srtt filter,
* update anything that the user "locked".
*/
if (tp->t_rttupdated >= 16) {
- register u_long i = 0;
+ register u_int32_t i = 0;
+
#if INET6
if (isipv6) {
struct sockaddr_in6 *sin6;
- if ((rt = inp->in6p_route.ro_rt) == NULL)
+ if (rt == NULL)
goto no_valid_rt;
sin6 = (struct sockaddr_in6 *)rt_key(rt);
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
}
else
#endif /* INET6 */
- rt = inp->inp_route.ro_rt;
- if (rt == NULL ||
- ((struct sockaddr_in *)rt_key(rt))->sin_addr.s_addr
- == INADDR_ANY || rt->generation_id != route_generation) {
- if (tp->t_state >= TCPS_CLOSE_WAIT)
+ if (rt == NULL || !(rt->rt_flags & RTF_UP) ||
+ ((struct sockaddr_in *)rt_key(rt))->sin_addr.s_addr ==
+ INADDR_ANY || rt->generation_id != route_generation) {
+ if (tp->t_state >= TCPS_CLOSE_WAIT) {
+ DTRACE_TCP4(state__change, void, NULL, struct inpcb *, inp,
+ struct tcpcb *, tp, int32_t, TCPS_CLOSING);
tp->t_state = TCPS_CLOSING;
-
+ }
goto no_valid_rt;
}
+ RT_LOCK_ASSERT_HELD(rt);
if ((rt->rt_rmx.rmx_locks & RTV_RTT) == 0) {
i = tp->t_srtt *
- (RTM_RTTUNIT / (PR_SLOWHZ * TCP_RTT_SCALE));
+ (RTM_RTTUNIT / (TCP_RETRANSHZ * TCP_RTT_SCALE));
if (rt->rt_rmx.rmx_rtt && i)
/*
* filter this update to half the old & half
}
if ((rt->rt_rmx.rmx_locks & RTV_RTTVAR) == 0) {
i = tp->t_rttvar *
- (RTM_RTTUNIT / (PR_SLOWHZ * TCP_RTTVAR_SCALE));
+ (RTM_RTTUNIT / (TCP_RETRANSHZ * TCP_RTTVAR_SCALE));
if (rt->rt_rmx.rmx_rttvar && i)
rt->rt_rmx.rmx_rttvar =
(rt->rt_rmx.rmx_rttvar + i) / 2;
i = (i + tp->t_maxseg / 2) / tp->t_maxseg;
if (i < 2)
i = 2;
- i *= (u_long)(tp->t_maxseg +
+ i *= (u_int32_t)(tp->t_maxseg +
#if INET6
(isipv6 ? sizeof (struct ip6_hdr) +
sizeof (struct tcphdr) :
tcpstat.tcps_cachedssthresh++;
}
}
- rt = inp->inp_route.ro_rt;
- if (rt) {
- /*
- * mark route for deletion if no information is
- * cached.
- */
- if ((tp->t_flags & TF_LQ_OVERFLOW) && tcp_lq_overflow &&
- ((rt->rt_rmx.rmx_locks & RTV_RTT) == 0)){
- if (rt->rt_rmx.rmx_rtt == 0)
- rt->rt_flags |= RTF_DELCLONE;
+
+ /*
+ * Mark route for deletion if no information is cached.
+ */
+ if (rt != NULL && (so->so_flags & SOF_OVERFLOW) && tcp_lq_overflow) {
+ if (!(rt->rt_rmx.rmx_locks & RTV_RTT) &&
+ rt->rt_rmx.rmx_rtt == 0) {
+ rt->rt_flags |= RTF_DELCLONE;
}
}
- no_valid_rt:
+
+no_valid_rt:
+ if (rt != NULL)
+ RT_UNLOCK(rt);
+
/* free the reassembly queue, if any */
(void) tcp_freeq(tp);
tcp_free_sackholes(tp);
+ /* Free the packet list */
+ if (tp->t_pktlist_head != NULL)
+ m_freem_list(tp->t_pktlist_head);
+ TCP_PKTLIST_CLEAR(tp);
+
#ifdef __APPLE__
if (so->cached_in_sock_layer)
inp->inp_saved_ppcb = (caddr_t) tp;
#endif
+ /* Issue a wakeup before detach so that we don't miss
+ * a wakeup
+ */
+ sodisconnectwakeup(so);
- soisdisconnected(so);
#if INET6
if (INP_CHECK_SOCKAF(so, AF_INET6))
in6_pcbdetach(inp);
else
#endif /* INET6 */
in_pcbdetach(inp);
+
+ /* Call soisdisconnected after detach because it might unlock the socket */
+ soisdisconnected(so);
tcpstat.tcps_closed++;
KERNEL_DEBUG(DBG_FNC_TCP_CLOSE | DBG_FUNC_END, tcpstat.tcps_closed,0,0,0,0);
- return ((struct tcpcb *)0);
+ return(NULL);
}
int
while((q = LIST_FIRST(&tp->t_segq)) != NULL) {
LIST_REMOVE(q, tqe_q);
m_freem(q->tqe_m);
- FREE(q, M_TSEGQ);
+ zfree(tcp_reass_zone, q);
tcp_reass_qsize--;
rv = 1;
}
void
tcp_drain()
{
-/*
- * ###LD 05/19/04 locking issue, tcpdrain is disabled, deadlock situation with tcbinfo.mtx
- */
if (do_tcpdrain)
{
struct inpcb *inpb;
* where we're really low on mbufs, this is potentially
* usefull.
*/
- lck_rw_lock_exclusive(tcbinfo.mtx);
+ if (!lck_rw_try_lock_exclusive(tcbinfo.mtx)) /* do it next time if the lock is in use */
+ return;
+
for (inpb = LIST_FIRST(tcbinfo.listhead); inpb;
inpb = LIST_NEXT(inpb, inp_list)) {
if ((tcpb = intotcpcb(inpb))) {
!= NULL) {
LIST_REMOVE(te, tqe_q);
m_freem(te->tqe_m);
- FREE(te, M_TSEGQ);
+ zfree(tcp_reass_zone, te);
tcp_reass_qsize--;
}
}
#endif
}
+/*
+ * tcpcb_to_otcpcb copies specific bits of a tcpcb to a otcpcb format.
+ * The otcpcb data structure is passed to user space and must not change.
+ */
+static void
+tcpcb_to_otcpcb(struct tcpcb *tp, struct otcpcb *otp)
+{
+ int i;
+
+ otp->t_segq = (u_int32_t)(uintptr_t)tp->t_segq.lh_first;
+ otp->t_dupacks = tp->t_dupacks;
+ for (i = 0; i < TCPT_NTIMERS_EXT; i++)
+ otp->t_timer[i] = tp->t_timer[i];
+ otp->t_inpcb = (_TCPCB_PTR(struct inpcb *))(uintptr_t)tp->t_inpcb;
+ otp->t_state = tp->t_state;
+ otp->t_flags = tp->t_flags;
+ otp->t_force = tp->t_force;
+ otp->snd_una = tp->snd_una;
+ otp->snd_max = tp->snd_max;
+ otp->snd_nxt = tp->snd_nxt;
+ otp->snd_up = tp->snd_up;
+ otp->snd_wl1 = tp->snd_wl1;
+ otp->snd_wl2 = tp->snd_wl2;
+ otp->iss = tp->iss;
+ otp->irs = tp->irs;
+ otp->rcv_nxt = tp->rcv_nxt;
+ otp->rcv_adv = tp->rcv_adv;
+ otp->rcv_wnd = tp->rcv_wnd;
+ otp->rcv_up = tp->rcv_up;
+ otp->snd_wnd = tp->snd_wnd;
+ otp->snd_cwnd = tp->snd_cwnd;
+ otp->snd_ssthresh = tp->snd_ssthresh;
+ otp->t_maxopd = tp->t_maxopd;
+ otp->t_rcvtime = tp->t_rcvtime;
+ otp->t_starttime = tp->t_starttime;
+ otp->t_rtttime = tp->t_rtttime;
+ otp->t_rtseq = tp->t_rtseq;
+ otp->t_rxtcur = tp->t_rxtcur;
+ otp->t_maxseg = tp->t_maxseg;
+ otp->t_srtt = tp->t_srtt;
+ otp->t_rttvar = tp->t_rttvar;
+ otp->t_rxtshift = tp->t_rxtshift;
+ otp->t_rttmin = tp->t_rttmin;
+ otp->t_rttupdated = tp->t_rttupdated;
+ otp->max_sndwnd = tp->max_sndwnd;
+ otp->t_softerror = tp->t_softerror;
+ otp->t_oobflags = tp->t_oobflags;
+ otp->t_iobc = tp->t_iobc;
+ otp->snd_scale = tp->snd_scale;
+ otp->rcv_scale = tp->rcv_scale;
+ otp->request_r_scale = tp->request_r_scale;
+ otp->requested_s_scale = tp->requested_s_scale;
+ otp->ts_recent = tp->ts_recent;
+ otp->ts_recent_age = tp->ts_recent_age;
+ otp->last_ack_sent = tp->last_ack_sent;
+ otp->cc_send = tp->cc_send;
+ otp->cc_recv = tp->cc_recv;
+ otp->snd_recover = tp->snd_recover;
+ otp->snd_cwnd_prev = tp->snd_cwnd_prev;
+ otp->snd_ssthresh_prev = tp->snd_ssthresh_prev;
+ otp->t_badrxtwin = tp->t_badrxtwin;
+}
+
static int
tcp_pcblist SYSCTL_HANDLER_ARGS
{
+#pragma unused(oidp, arg1, arg2)
int error, i, n;
struct inpcb *inp, **inp_list;
inp_gen_t gencnt;
struct xinpgen xig;
+ int slot;
/*
* The process of preparing the TCB list is too time-consuming and
lck_rw_done(tcbinfo.mtx);
return error;
}
- /*
- * We are done if there is no pcb
- */
- if (n == 0) {
- lck_rw_done(tcbinfo.mtx);
- return 0;
+ /*
+ * We are done if there is no pcb
+ */
+ if (n == 0) {
+ lck_rw_done(tcbinfo.mtx);
+ return 0;
}
inp_list = _MALLOC(n * sizeof *inp_list, M_TEMP, M_WAITOK);
#endif
inp_list[i++] = inp;
}
+
+ for (slot = 0; slot < N_TIME_WAIT_SLOTS; slot++) {
+ struct inpcb *inpnxt;
+
+ for (inp = time_wait_slots[slot].lh_first; inp && i < n; inp = inpnxt) {
+ inpnxt = inp->inp_list.le_next;
+ if (inp->inp_gencnt <= gencnt && inp->inp_state != INPCB_STATE_DEAD)
+ inp_list[i++] = inp;
+ }
+ }
+
n = i;
error = 0;
inpcb_to_compat(inp, &xt.xt_inp);
inp_ppcb = inp->inp_ppcb;
if (inp_ppcb != NULL) {
- bcopy(inp_ppcb, &xt.xt_tp, sizeof xt.xt_tp);
- }
- else
+ tcpcb_to_otcpcb((struct tcpcb *)inp_ppcb,
+ &xt.xt_tp);
+ } else {
bzero((char *) &xt.xt_tp, sizeof xt.xt_tp);
+ }
if (inp->inp_socket)
sotoxsocket(inp->inp_socket, &xt.xt_socket);
error = SYSCTL_OUT(req, &xt, sizeof xt);
return error;
}
-SYSCTL_PROC(_net_inet_tcp, TCPCTL_PCBLIST, pcblist, CTLFLAG_RD, 0, 0,
+SYSCTL_PROC(_net_inet_tcp, TCPCTL_PCBLIST, pcblist, CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0,
tcp_pcblist, "S,xtcpcb", "List of active TCP connections");
-#ifndef __APPLE__
+#if !CONFIG_EMBEDDED
+
+static void
+tcpcb_to_xtcpcb64(struct tcpcb *tp, struct xtcpcb64 *otp)
+{
+ int i;
+
+ otp->t_segq = (u_int32_t)(uintptr_t)tp->t_segq.lh_first;
+ otp->t_dupacks = tp->t_dupacks;
+ for (i = 0; i < TCPT_NTIMERS_EXT; i++)
+ otp->t_timer[i] = tp->t_timer[i];
+ otp->t_state = tp->t_state;
+ otp->t_flags = tp->t_flags;
+ otp->t_force = tp->t_force;
+ otp->snd_una = tp->snd_una;
+ otp->snd_max = tp->snd_max;
+ otp->snd_nxt = tp->snd_nxt;
+ otp->snd_up = tp->snd_up;
+ otp->snd_wl1 = tp->snd_wl1;
+ otp->snd_wl2 = tp->snd_wl2;
+ otp->iss = tp->iss;
+ otp->irs = tp->irs;
+ otp->rcv_nxt = tp->rcv_nxt;
+ otp->rcv_adv = tp->rcv_adv;
+ otp->rcv_wnd = tp->rcv_wnd;
+ otp->rcv_up = tp->rcv_up;
+ otp->snd_wnd = tp->snd_wnd;
+ otp->snd_cwnd = tp->snd_cwnd;
+ otp->snd_ssthresh = tp->snd_ssthresh;
+ otp->t_maxopd = tp->t_maxopd;
+ otp->t_rcvtime = tp->t_rcvtime;
+ otp->t_starttime = tp->t_starttime;
+ otp->t_rtttime = tp->t_rtttime;
+ otp->t_rtseq = tp->t_rtseq;
+ otp->t_rxtcur = tp->t_rxtcur;
+ otp->t_maxseg = tp->t_maxseg;
+ otp->t_srtt = tp->t_srtt;
+ otp->t_rttvar = tp->t_rttvar;
+ otp->t_rxtshift = tp->t_rxtshift;
+ otp->t_rttmin = tp->t_rttmin;
+ otp->t_rttupdated = tp->t_rttupdated;
+ otp->max_sndwnd = tp->max_sndwnd;
+ otp->t_softerror = tp->t_softerror;
+ otp->t_oobflags = tp->t_oobflags;
+ otp->t_iobc = tp->t_iobc;
+ otp->snd_scale = tp->snd_scale;
+ otp->rcv_scale = tp->rcv_scale;
+ otp->request_r_scale = tp->request_r_scale;
+ otp->requested_s_scale = tp->requested_s_scale;
+ otp->ts_recent = tp->ts_recent;
+ otp->ts_recent_age = tp->ts_recent_age;
+ otp->last_ack_sent = tp->last_ack_sent;
+ otp->cc_send = tp->cc_send;
+ otp->cc_recv = tp->cc_recv;
+ otp->snd_recover = tp->snd_recover;
+ otp->snd_cwnd_prev = tp->snd_cwnd_prev;
+ otp->snd_ssthresh_prev = tp->snd_ssthresh_prev;
+ otp->t_badrxtwin = tp->t_badrxtwin;
+}
+
+
static int
-tcp_getcred(SYSCTL_HANDLER_ARGS)
+tcp_pcblist64 SYSCTL_HANDLER_ARGS
{
- struct sockaddr_in addrs[2];
- struct inpcb *inp;
- int error, s;
-
- error = suser(req->p);
- if (error)
- return (error);
- error = SYSCTL_IN(req, addrs, sizeof(addrs));
- if (error)
- return (error);
- s = splnet();
- inp = in_pcblookup_hash(&tcbinfo, addrs[1].sin_addr, addrs[1].sin_port,
- addrs[0].sin_addr, addrs[0].sin_port, 0, NULL);
- if (inp == NULL || inp->inp_socket == NULL) {
- error = ENOENT;
- goto out;
- }
- error = SYSCTL_OUT(req, inp->inp_socket->so_cred, sizeof(*(kauth_cred_t)0);
-out:
- splx(s);
- return (error);
+#pragma unused(oidp, arg1, arg2)
+ int error, i, n;
+ struct inpcb *inp, **inp_list;
+ inp_gen_t gencnt;
+ struct xinpgen xig;
+ int slot;
+
+ /*
+ * The process of preparing the TCB list is too time-consuming and
+ * resource-intensive to repeat twice on every request.
+ */
+ lck_rw_lock_shared(tcbinfo.mtx);
+ if (req->oldptr == USER_ADDR_NULL) {
+ n = tcbinfo.ipi_count;
+ req->oldidx = 2 * (sizeof xig)
+ + (n + n/8) * sizeof(struct xtcpcb64);
+ lck_rw_done(tcbinfo.mtx);
+ return 0;
+ }
+
+ if (req->newptr != USER_ADDR_NULL) {
+ lck_rw_done(tcbinfo.mtx);
+ return EPERM;
+ }
+
+ /*
+ * OK, now we're committed to doing something.
+ */
+ gencnt = tcbinfo.ipi_gencnt;
+ n = tcbinfo.ipi_count;
+
+ bzero(&xig, sizeof(xig));
+ xig.xig_len = sizeof xig;
+ xig.xig_count = n;
+ xig.xig_gen = gencnt;
+ xig.xig_sogen = so_gencnt;
+ error = SYSCTL_OUT(req, &xig, sizeof xig);
+ if (error) {
+ lck_rw_done(tcbinfo.mtx);
+ return error;
+ }
+ /*
+ * We are done if there is no pcb
+ */
+ if (n == 0) {
+ lck_rw_done(tcbinfo.mtx);
+ return 0;
+ }
+
+ inp_list = _MALLOC(n * sizeof *inp_list, M_TEMP, M_WAITOK);
+ if (inp_list == 0) {
+ lck_rw_done(tcbinfo.mtx);
+ return ENOMEM;
+ }
+
+ for (inp = LIST_FIRST(tcbinfo.listhead), i = 0; inp && i < n;
+ inp = LIST_NEXT(inp, inp_list)) {
+#ifdef __APPLE__
+ if (inp->inp_gencnt <= gencnt && inp->inp_state != INPCB_STATE_DEAD)
+#else
+ if (inp->inp_gencnt <= gencnt && !prison_xinpcb(req->p, inp))
+#endif
+ inp_list[i++] = inp;
+ }
+
+ for (slot = 0; slot < N_TIME_WAIT_SLOTS; slot++) {
+ struct inpcb *inpnxt;
+
+ for (inp = time_wait_slots[slot].lh_first; inp && i < n; inp = inpnxt) {
+ inpnxt = inp->inp_list.le_next;
+ if (inp->inp_gencnt <= gencnt && inp->inp_state != INPCB_STATE_DEAD)
+ inp_list[i++] = inp;
+ }
+ }
+
+ n = i;
+
+ error = 0;
+ for (i = 0; i < n; i++) {
+ inp = inp_list[i];
+ if (inp->inp_gencnt <= gencnt && inp->inp_state != INPCB_STATE_DEAD) {
+ struct xtcpcb64 xt;
+
+ bzero(&xt, sizeof(xt));
+ xt.xt_len = sizeof xt;
+ inpcb_to_xinpcb64(inp, &xt.xt_inpcb);
+ xt.xt_inpcb.inp_ppcb = (u_int64_t)(uintptr_t)inp->inp_ppcb;
+ if (inp->inp_ppcb != NULL)
+ tcpcb_to_xtcpcb64((struct tcpcb *)inp->inp_ppcb, &xt);
+ if (inp->inp_socket)
+ sotoxsocket64(inp->inp_socket, &xt.xt_inpcb.xi_socket);
+ error = SYSCTL_OUT(req, &xt, sizeof xt);
+ }
+ }
+ if (!error) {
+ /*
+ * Give the user an updated idea of our state.
+ * If the generation differs from what we told
+ * her before, she knows that something happened
+ * while we were processing this request, and it
+ * might be necessary to retry.
+ */
+ bzero(&xig, sizeof(xig));
+ xig.xig_len = sizeof xig;
+ xig.xig_gen = tcbinfo.ipi_gencnt;
+ xig.xig_sogen = so_gencnt;
+ xig.xig_count = tcbinfo.ipi_count;
+ error = SYSCTL_OUT(req, &xig, sizeof xig);
+ }
+ FREE(inp_list, M_TEMP);
+ lck_rw_done(tcbinfo.mtx);
+ return error;
}
-SYSCTL_PROC(_net_inet_tcp, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
- 0, 0, tcp_getcred, "S,ucred", "Get the ucred of a TCP connection");
+SYSCTL_PROC(_net_inet_tcp, OID_AUTO, pcblist64, CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0,
+ tcp_pcblist64, "S,xtcpcb64", "List of active TCP connections");
+
+#endif /* !CONFIG_EMBEDDED */
-#if INET6
static int
-tcp6_getcred(SYSCTL_HANDLER_ARGS)
+tcp_pcblist_n SYSCTL_HANDLER_ARGS
{
- struct sockaddr_in6 addrs[2];
- struct inpcb *inp;
- int error, s, mapped = 0;
-
- error = suser(req->p);
- if (error)
- return (error);
- error = SYSCTL_IN(req, addrs, sizeof(addrs));
- if (error)
- return (error);
- if (IN6_IS_ADDR_V4MAPPED(&addrs[0].sin6_addr)) {
- if (IN6_IS_ADDR_V4MAPPED(&addrs[1].sin6_addr))
- mapped = 1;
- else
- return (EINVAL);
- }
- s = splnet();
- if (mapped == 1)
- inp = in_pcblookup_hash(&tcbinfo,
- *(struct in_addr *)&addrs[1].sin6_addr.s6_addr[12],
- addrs[1].sin6_port,
- *(struct in_addr *)&addrs[0].sin6_addr.s6_addr[12],
- addrs[0].sin6_port,
- 0, NULL);
- else
- inp = in6_pcblookup_hash(&tcbinfo, &addrs[1].sin6_addr,
- addrs[1].sin6_port,
- &addrs[0].sin6_addr, addrs[0].sin6_port,
- 0, NULL);
- if (inp == NULL || inp->inp_socket == NULL) {
- error = ENOENT;
- goto out;
- }
- error = SYSCTL_OUT(req, inp->inp_socket->so_cred,
- sizeof(*(kauth_cred_t)0);
-out:
- splx(s);
- return (error);
+#pragma unused(oidp, arg1, arg2)
+ int error = 0;
+
+ error = get_pcblist_n(IPPROTO_TCP, req, &tcbinfo);
+
+ return error;
}
-SYSCTL_PROC(_net_inet6_tcp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
- 0, 0,
- tcp6_getcred, "S,ucred", "Get the ucred of a TCP6 connection");
-#endif
-#endif /* __APPLE__*/
+
+SYSCTL_PROC(_net_inet_tcp, OID_AUTO, pcblist_n, CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0,
+ tcp_pcblist_n, "S,xtcpcb_n", "List of active TCP connections");
+
void
tcp_ctlinput(cmd, sa, vip)
struct sockaddr *sa;
void *vip;
{
+ tcp_seq icmp_tcp_seq;
struct ip *ip = vip;
struct tcphdr *th;
struct in_addr faddr;
struct inpcb *inp;
struct tcpcb *tp;
+
void (*notify)(struct inpcb *, int) = tcp_notify;
- tcp_seq icmp_seq;
+
+ struct icmp *icp;
faddr = ((struct sockaddr_in *)sa)->sin_addr;
if (sa->sa_family != AF_INET || faddr.s_addr == INADDR_ANY)
return;
- if (cmd == PRC_QUENCH)
- notify = tcp_quench;
+ if (cmd == PRC_MSGSIZE)
+ notify = tcp_mtudisc;
else if (icmp_may_rst && (cmd == PRC_UNREACH_ADMIN_PROHIB ||
cmd == PRC_UNREACH_PORT) && ip)
notify = tcp_drop_syn_sent;
- else if (cmd == PRC_MSGSIZE)
- notify = tcp_mtudisc;
else if (PRC_IS_REDIRECT(cmd)) {
ip = 0;
notify = in_rtchange;
} else if (cmd == PRC_HOSTDEAD)
ip = 0;
+ /* Source quench is deprecated */
+ else if (cmd == PRC_QUENCH)
+ return;
else if ((unsigned)cmd > PRC_NCMDS || inetctlerrmap[cmd] == 0)
return;
if (ip) {
+ icp = (struct icmp *)((caddr_t)ip
+ - offsetof(struct icmp, icmp_ip));
th = (struct tcphdr *)((caddr_t)ip
- + (IP_VHL_HL(ip->ip_vhl) << 2));
+ + (IP_VHL_HL(ip->ip_vhl) << 2));
inp = in_pcblookup_hash(&tcbinfo, faddr, th->th_dport,
ip->ip_src, th->th_sport, 0, NULL);
if (inp != NULL && inp->inp_socket != NULL) {
tcp_unlock(inp->inp_socket, 1, 0);
return;
}
- icmp_seq = htonl(th->th_seq);
+ icmp_tcp_seq = htonl(th->th_seq);
tp = intotcpcb(inp);
- if (SEQ_GEQ(icmp_seq, tp->snd_una) &&
- SEQ_LT(icmp_seq, tp->snd_max))
+ if (SEQ_GEQ(icmp_tcp_seq, tp->snd_una) &&
+ SEQ_LT(icmp_tcp_seq, tp->snd_max)) {
+ if (cmd == PRC_MSGSIZE) {
+
+ /*
+ * MTU discovery:
+ * If we got a needfrag and there is a host route to the
+ * original destination, and the MTU is not locked, then
+ * set the MTU in the route to the suggested new value
+ * (if given) and then notify as usual. The ULPs will
+ * notice that the MTU has changed and adapt accordingly.
+ * If no new MTU was suggested, then we guess a new one
+ * less than the current value. If the new MTU is
+ * unreasonably small (defined by sysctl tcp_minmss), then
+ * we reset the MTU to the interface value and enable the
+ * lock bit, indicating that we are no longer doing MTU
+ * discovery.
+ */
+ struct rtentry *rt;
+ int mtu;
+ struct sockaddr_in icmpsrc = { sizeof (struct sockaddr_in), AF_INET,
+ 0 , { 0 }, { 0,0,0,0,0,0,0,0 } };
+ icmpsrc.sin_addr = icp->icmp_ip.ip_dst;
+
+ rt = rtalloc1((struct sockaddr *)&icmpsrc, 0,
+ RTF_CLONING | RTF_PRCLONING);
+ if (rt != NULL) {
+ RT_LOCK(rt);
+ if ((rt->rt_flags & RTF_HOST) &&
+ !(rt->rt_rmx.rmx_locks & RTV_MTU)) {
+ mtu = ntohs(icp->icmp_nextmtu);
+ if (!mtu)
+ mtu = ip_next_mtu(rt->rt_rmx.
+ rmx_mtu, 1);
+#if DEBUG_MTUDISC
+ printf("MTU for %s reduced to %d\n",
+ inet_ntop(AF_INET,
+ &icmpsrc.sin_addr, ipv4str,
+ sizeof (ipv4str)), mtu);
+#endif
+ if (mtu < max(296, (tcp_minmss +
+ sizeof (struct tcpiphdr)))) {
+ /* rt->rt_rmx.rmx_mtu =
+ rt->rt_ifp->if_mtu; */
+ rt->rt_rmx.rmx_locks |= RTV_MTU;
+ } else if (rt->rt_rmx.rmx_mtu > mtu) {
+ rt->rt_rmx.rmx_mtu = mtu;
+ }
+ }
+ RT_UNLOCK(rt);
+ rtfree(rt);
+ }
+ }
+
(*notify)(inp, inetctlerrmap[cmd]);
+ }
tcp_unlock(inp->inp_socket, 1, 0);
}
} else
sa->sa_len != sizeof(struct sockaddr_in6))
return;
- if (cmd == PRC_QUENCH)
- notify = tcp_quench;
- else if (cmd == PRC_MSGSIZE)
+ if (cmd == PRC_MSGSIZE)
notify = tcp_mtudisc;
else if (!PRC_IS_REDIRECT(cmd) &&
((unsigned)cmd > PRC_NCMDS || inet6ctlerrmap[cmd] == 0))
return;
+ /* Source quench is deprecated */
+ else if (cmd == PRC_QUENCH)
+ return;
/* if the parameter is from icmp6, decode it. */
if (d != NULL) {
in6_pcbnotify(&tcbinfo, sa, th.th_dport,
(struct sockaddr *)ip6cp->ip6c_src,
- th.th_sport, cmd, notify);
- } else
- in6_pcbnotify(&tcbinfo, sa, 0, (struct sockaddr *)sa6_src,
- 0, cmd, notify);
+ th.th_sport, cmd, NULL, notify);
+ } else {
+ in6_pcbnotify(&tcbinfo, sa, 0,
+ (struct sockaddr *)(size_t)sa6_src, 0, cmd, NULL, notify);
+ }
}
#endif /* INET6 */
#define ISN_BYTES_PER_SECOND 1048576
-u_char isn_secret[32];
-int isn_last_reseed;
-MD5_CTX isn_ctx;
-
tcp_seq
tcp_new_isn(tp)
struct tcpcb *tp;
u_int32_t md5_buffer[4];
tcp_seq new_isn;
struct timeval timenow;
+ u_char isn_secret[32];
+ int isn_last_reseed = 0;
+ MD5_CTX isn_ctx;
/* Use arc4random for SYN-ACKs when not in exact RFC1948 mode. */
if (((tp->t_state == TCPS_LISTEN) || (tp->t_state == TCPS_TIME_WAIT))
return new_isn;
}
-/*
- * When a source quench is received, close congestion window
- * to one segment. We will gradually open it again as we proceed.
- */
-void
-tcp_quench(
- struct inpcb *inp,
- __unused int errno
-)
-{
- struct tcpcb *tp = intotcpcb(inp);
-
- if (tp)
- tp->snd_cwnd = tp->t_maxseg;
-}
/*
* When a specific ICMP unreachable message is received and the
if (tp) {
#if INET6
if (isipv6)
- rt = tcp_rtlookup6(inp);
+ rt = tcp_rtlookup6(inp, IFSCOPE_NONE);
else
#endif /* INET6 */
- rt = tcp_rtlookup(inp);
+ rt = tcp_rtlookup(inp, IFSCOPE_NONE);
if (!rt || !rt->rt_rmx.rmx_mtu) {
tp->t_maxopd = tp->t_maxseg =
#if INET6
isipv6 ? tcp_v6mssdflt :
#endif /* INET6 */
tcp_mssdflt;
+
+ /* Route locked during lookup above */
+ if (rt != NULL)
+ RT_UNLOCK(rt);
return;
}
taop = rmx_taop(rt->rt_rmx);
#endif /* INET6 */
;
+ /* Route locked during lookup above */
+ RT_UNLOCK(rt);
+
if (offered)
mss = min(mss, offered);
/*
tp->t_maxseg = mss;
+ /*
+ * Reset the slow-start flight size as it may depends on the new MSS
+ */
+ if (CC_ALGO(tp)->cwnd_init != NULL)
+ CC_ALGO(tp)->cwnd_init(tp);
tcpstat.tcps_mturesent++;
tp->t_rtttime = 0;
tp->snd_nxt = tp->snd_una;
* Look-up the routing entry to the peer of this inpcb. If no route
* is found and it cannot be allocated the return NULL. This routine
* is called by TCP routines that access the rmx structure and by tcp_mss
- * to get the interface MTU.
+ * to get the interface MTU. If a route is found, this routine will
+ * hold the rtentry lock; the caller is responsible for unlocking.
*/
struct rtentry *
-tcp_rtlookup(inp)
+tcp_rtlookup(inp, input_ifscope)
struct inpcb *inp;
+ unsigned int input_ifscope;
{
struct route *ro;
struct rtentry *rt;
+ struct tcpcb *tp;
+
+ lck_mtx_assert(rnh_lock, LCK_MTX_ASSERT_NOTOWNED);
ro = &inp->inp_route;
- if (ro == NULL)
- return (NULL);
- rt = ro->ro_rt;
- if (rt == NULL || !(rt->rt_flags & RTF_UP) || rt->generation_id != route_generation) {
+ if ((rt = ro->ro_rt) != NULL)
+ RT_LOCK(rt);
+
+ if (rt == NULL || !(rt->rt_flags & RTF_UP) ||
+ rt->generation_id != route_generation) {
/* No route yet, so try to acquire one */
if (inp->inp_faddr.s_addr != INADDR_ANY) {
+ unsigned int ifscope;
+
ro->ro_dst.sa_family = AF_INET;
ro->ro_dst.sa_len = sizeof(struct sockaddr_in);
((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
inp->inp_faddr;
- rtalloc(ro);
- rt = ro->ro_rt;
+
+ /*
+ * If the socket was bound to an interface, then
+ * the bound-to-interface takes precedence over
+ * the inbound interface passed in by the caller
+ * (if we get here as part of the output path then
+ * input_ifscope is IFSCOPE_NONE).
+ */
+ ifscope = (inp->inp_flags & INP_BOUND_IF) ?
+ inp->inp_boundif : input_ifscope;
+
+ if (rt != NULL)
+ RT_UNLOCK(rt);
+ rtalloc_scoped(ro, ifscope);
+ if ((rt = ro->ro_rt) != NULL)
+ RT_LOCK(rt);
}
}
+
+ /*
+ * Update MTU discovery determination. Don't do it if:
+ * 1) it is disabled via the sysctl
+ * 2) the route isn't up
+ * 3) the MTU is locked (if it is, then discovery has been
+ * disabled)
+ */
+
+ tp = intotcpcb(inp);
+
+ if (!path_mtu_discovery || ((rt != NULL) &&
+ (!(rt->rt_flags & RTF_UP) || (rt->rt_rmx.rmx_locks & RTV_MTU))))
+ tp->t_flags &= ~TF_PMTUD;
+ else
+ tp->t_flags |= TF_PMTUD;
+
+#if CONFIG_IFEF_NOWINDOWSCALE
+ if (tcp_obey_ifef_nowindowscale &&
+ tp->t_state == TCPS_SYN_SENT && rt != NULL && rt->rt_ifp != NULL &&
+ (rt->rt_ifp->if_eflags & IFEF_NOWINDOWSCALE)) {
+ /* Window scaling is enabled on this interface */
+ tp->t_flags &= ~TF_REQ_SCALE;
+ }
+#endif
+
+ if (rt != NULL && rt->rt_ifp != NULL) {
+ somultipages(inp->inp_socket,
+ (rt->rt_ifp->if_hwassist & IFNET_MULTIPAGES));
+ tcp_set_tso(tp, rt->rt_ifp);
+ }
+
+ /*
+ * Caller needs to call RT_UNLOCK(rt).
+ */
return rt;
}
#if INET6
struct rtentry *
-tcp_rtlookup6(inp)
+tcp_rtlookup6(inp, input_ifscope)
struct inpcb *inp;
+ unsigned int input_ifscope;
{
struct route_in6 *ro6;
struct rtentry *rt;
+ struct tcpcb *tp;
+
+ lck_mtx_assert(rnh_lock, LCK_MTX_ASSERT_NOTOWNED);
ro6 = &inp->in6p_route;
- rt = ro6->ro_rt;
- if (rt == NULL || !(rt->rt_flags & RTF_UP)) {
+ if ((rt = ro6->ro_rt) != NULL)
+ RT_LOCK(rt);
+
+ if (rt == NULL || !(rt->rt_flags & RTF_UP) ||
+ rt->generation_id != route_generation) {
/* No route yet, so try to acquire one */
if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
struct sockaddr_in6 *dst6;
+ unsigned int ifscope;
dst6 = (struct sockaddr_in6 *)&ro6->ro_dst;
dst6->sin6_family = AF_INET6;
dst6->sin6_len = sizeof(*dst6);
dst6->sin6_addr = inp->in6p_faddr;
- rtalloc((struct route *)ro6);
- rt = ro6->ro_rt;
+
+ /*
+ * If the socket was bound to an interface, then
+ * the bound-to-interface takes precedence over
+ * the inbound interface passed in by the caller
+ * (if we get here as part of the output path then
+ * input_ifscope is IFSCOPE_NONE).
+ */
+ ifscope = (inp->inp_flags & INP_BOUND_IF) ?
+ inp->inp_boundif : input_ifscope;
+
+ if (rt != NULL)
+ RT_UNLOCK(rt);
+ rtalloc_scoped((struct route *)ro6, ifscope);
+ if ((rt = ro6->ro_rt) != NULL)
+ RT_LOCK(rt);
}
}
+ /*
+ * Update path MTU Discovery determination
+ * while looking up the route:
+ * 1) we have a valid route to the destination
+ * 2) the MTU is not locked (if it is, then discovery has been
+ * disabled)
+ */
+
+
+ tp = intotcpcb(inp);
+
+ /*
+ * Update MTU discovery determination. Don't do it if:
+ * 1) it is disabled via the sysctl
+ * 2) the route isn't up
+ * 3) the MTU is locked (if it is, then discovery has been
+ * disabled)
+ */
+
+ if (!path_mtu_discovery || ((rt != NULL) &&
+ (!(rt->rt_flags & RTF_UP) || (rt->rt_rmx.rmx_locks & RTV_MTU))))
+ tp->t_flags &= ~TF_PMTUD;
+ else
+ tp->t_flags |= TF_PMTUD;
+
+#if CONFIG_IFEF_NOWINDOWSCALE
+ if (tcp_obey_ifef_nowindowscale &&
+ tp->t_state == TCPS_SYN_SENT && rt != NULL && rt->rt_ifp != NULL &&
+ (rt->rt_ifp->if_eflags & IFEF_NOWINDOWSCALE)) {
+ /* Window scaling is not enabled on this interface */
+ tp->t_flags &= ~TF_REQ_SCALE;
+ }
+#endif
+
+ if (rt != NULL && rt->rt_ifp != NULL) {
+ somultipages(inp->inp_socket,
+ (rt->rt_ifp->if_hwassist & IFNET_MULTIPAGES));
+ tcp_set_tso(tp, rt->rt_ifp);
+ }
+
+ /*
+ * Caller needs to call RT_UNLOCK(rt).
+ */
return rt;
}
#endif /* INET6 */
if ((tp == NULL) || ((inp = tp->t_inpcb) == NULL))
return 0;
- MGETHDR(m, M_DONTWAIT, MT_DATA);
+ MGETHDR(m, M_DONTWAIT, MT_DATA); /* MAC-OK */
if (!m)
return 0;
- lck_mtx_lock(sadb_mutex);
#if INET6
if ((inp->inp_vflag & INP_IPV6) != 0) {
ip6 = mtod(m, struct ip6_hdr *);
tcp_fillheaders(tp, ip, th);
hdrsiz = ipsec4_hdrsiz(m, IPSEC_DIR_OUTBOUND, inp);
}
- lck_mtx_unlock(sadb_mutex);
m_free(m);
return hdrsiz;
}
struct inpcb *inp;
{
struct rtentry *rt;
+ struct rmxp_tao *taop;
#if INET6
if ((inp->inp_vflag & INP_IPV6) != 0)
- rt = tcp_rtlookup6(inp);
+ rt = tcp_rtlookup6(inp, IFSCOPE_NONE);
else
#endif /* INET6 */
- rt = tcp_rtlookup(inp);
+ rt = tcp_rtlookup(inp, IFSCOPE_NONE);
/* Make sure this is a host route and is up. */
if (rt == NULL ||
- (rt->rt_flags & (RTF_UP|RTF_HOST)) != (RTF_UP|RTF_HOST))
+ (rt->rt_flags & (RTF_UP|RTF_HOST)) != (RTF_UP|RTF_HOST)) {
+ /* Route locked during lookup above */
+ if (rt != NULL)
+ RT_UNLOCK(rt);
return NULL;
-
- return rmx_taop(rt->rt_rmx);
+ }
+
+ taop = rmx_taop(rt->rt_rmx);
+ /* Route locked during lookup above */
+ RT_UNLOCK(rt);
+ return (taop);
}
/*
}
int
-tcp_lock(so, refcount, lr)
- struct socket *so;
- int refcount;
- int lr;
+tcp_lock(struct socket *so, int refcount, void *lr)
{
- int lr_saved;
-#ifdef __ppc__
- if (lr == 0) {
- __asm__ volatile("mflr %0" : "=r" (lr_saved));
- }
- else lr_saved = lr;
-#endif
+ void *lr_saved;
- if (so->so_pcb) {
- lck_mtx_lock(((struct inpcb *)so->so_pcb)->inpcb_mtx);
- }
- else {
- panic("tcp_lock: so=%x NO PCB! lr=%x\n", so, lr_saved);
- lck_mtx_lock(so->so_proto->pr_domain->dom_mtx);
+ if (lr == NULL)
+ lr_saved = __builtin_return_address(0);
+ else
+ lr_saved = lr;
+
+ if (so->so_pcb != NULL) {
+ lck_mtx_lock(&((struct inpcb *)so->so_pcb)->inpcb_mtx);
+ } else {
+ panic("tcp_lock: so=%p NO PCB! lr=%p lrh= %s\n",
+ so, lr_saved, solockhistory_nr(so));
+ /* NOTREACHED */
}
- if (so->so_usecount < 0)
- panic("tcp_lock: so=%x so_pcb=%x lr=%x ref=%x\n",
- so, so->so_pcb, lr_saved, so->so_usecount);
-
+ if (so->so_usecount < 0) {
+ panic("tcp_lock: so=%p so_pcb=%p lr=%p ref=%x lrh= %s\n",
+ so, so->so_pcb, lr_saved, so->so_usecount, solockhistory_nr(so));
+ /* NOTREACHED */
+ }
if (refcount)
so->so_usecount++;
- so->reserved3 = (void *)lr_saved;
+ so->lock_lr[so->next_lock_lr] = lr_saved;
+ so->next_lock_lr = (so->next_lock_lr+1) % SO_LCKDBG_MAX;
return (0);
}
int
-tcp_unlock(so, refcount, lr)
- struct socket *so;
- int refcount;
- int lr;
+tcp_unlock(struct socket *so, int refcount, void *lr)
{
- int lr_saved;
-#ifdef __ppc__
- if (lr == 0) {
- __asm__ volatile("mflr %0" : "=r" (lr_saved));
- }
- else lr_saved = lr;
-#endif
+ void *lr_saved;
+
+ if (lr == NULL)
+ lr_saved = __builtin_return_address(0);
+ else
+ lr_saved = lr;
#ifdef MORE_TCPLOCK_DEBUG
- printf("tcp_unlock: so=%x sopcb=%x lock=%x ref=%x lr=%x\n",
- so, so->so_pcb, ((struct inpcb *)so->so_pcb)->inpcb_mtx, so->so_usecount, lr_saved);
+ printf("tcp_unlock: so=%p sopcb=%p lock=%p ref=%x lr=%p\n",
+ so, so->so_pcb, &((struct inpcb *)so->so_pcb)->inpcb_mtx,
+ so->so_usecount, lr_saved);
#endif
if (refcount)
so->so_usecount--;
- if (so->so_usecount < 0)
- panic("tcp_unlock: so=%x usecount=%x\n", so, so->so_usecount);
- if (so->so_pcb == NULL) {
- panic("tcp_unlock: so=%x NO PCB usecount=%x lr=%x\n", so, so->so_usecount, lr_saved);
- lck_mtx_unlock(so->so_proto->pr_domain->dom_mtx);
+ if (so->so_usecount < 0) {
+ panic("tcp_unlock: so=%p usecount=%x lrh= %s\n",
+ so, so->so_usecount, solockhistory_nr(so));
+ /* NOTREACHED */
}
- else {
- lck_mtx_assert(((struct inpcb *)so->so_pcb)->inpcb_mtx, LCK_MTX_ASSERT_OWNED);
- lck_mtx_unlock(((struct inpcb *)so->so_pcb)->inpcb_mtx);
+ if (so->so_pcb == NULL) {
+ panic("tcp_unlock: so=%p NO PCB usecount=%x lr=%p lrh= %s\n",
+ so, so->so_usecount, lr_saved, solockhistory_nr(so));
+ /* NOTREACHED */
+ } else {
+ lck_mtx_assert(&((struct inpcb *)so->so_pcb)->inpcb_mtx,
+ LCK_MTX_ASSERT_OWNED);
+ so->unlock_lr[so->next_unlock_lr] = lr_saved;
+ so->next_unlock_lr = (so->next_unlock_lr+1) % SO_LCKDBG_MAX;
+ lck_mtx_unlock(&((struct inpcb *)so->so_pcb)->inpcb_mtx);
}
- so->reserved4 = (void *)lr_saved;
return (0);
}
lck_mtx_t *
-tcp_getlock(so, locktype)
- struct socket *so;
- int locktype;
+tcp_getlock(
+ struct socket *so,
+ __unused int locktype)
{
struct inpcb *inp = sotoinpcb(so);
if (so->so_pcb) {
if (so->so_usecount < 0)
- panic("tcp_getlock: so=%x usecount=%x\n", so, so->so_usecount);
- return(inp->inpcb_mtx);
+ panic("tcp_getlock: so=%p usecount=%x lrh= %s\n",
+ so, so->so_usecount, solockhistory_nr(so));
+ return(&inp->inpcb_mtx);
}
else {
- panic("tcp_getlock: so=%x NULL so_pcb\n", so);
+ panic("tcp_getlock: so=%p NULL so_pcb %s\n",
+ so, solockhistory_nr(so));
return (so->so_proto->pr_domain->dom_mtx);
}
}
+
+int32_t
+tcp_sbspace(struct tcpcb *tp)
+{
+ struct sockbuf *sb = &tp->t_inpcb->inp_socket->so_rcv;
+ int32_t space, newspace;
+
+ space = ((int32_t) imin((sb->sb_hiwat - sb->sb_cc),
+ (sb->sb_mbmax - sb->sb_mbcnt)));
+ if (space < 0)
+ space = 0;
+
+ /* Avoid increasing window size if the current window
+ * is already very low, we could be in "persist" mode and
+ * we could break some apps (see rdar://5409343)
+ */
+
+ if (space < tp->t_maxseg)
+ return space;
+
+ /* Clip window size for slower link */
+
+ if (((tp->t_flags & TF_SLOWLINK) != 0) && slowlink_wsize > 0 )
+ return imin(space, slowlink_wsize);
+
+ /*
+ * Check for ressources constraints before over-ajusting the amount of space we can
+ * advertise in the TCP window size updates.
+ */
+
+ if (sbspace_factor && (tp->t_inpcb->inp_pcbinfo->ipi_count < tcp_sockthreshold) &&
+ (total_mb_cnt / 8) < (mbstat.m_clusters / sbspace_factor)) {
+ if (space < (int32_t)(sb->sb_maxused - sb->sb_cc)) {/* make sure we don't constrain the window if we have enough ressources */
+ space = (int32_t) imax((sb->sb_maxused - sb->sb_cc), tp->rcv_maxbyps);
+ }
+ newspace = (int32_t) imax(((int32_t)sb->sb_maxused - sb->sb_cc), (int32_t)tp->rcv_maxbyps);
+
+ if (newspace > space)
+ space = newspace;
+ }
+ return space;
+}
+/*
+ * Checks TCP Segment Offloading capability for a given connection and interface pair.
+ */
+void
+tcp_set_tso(tp, ifp)
+ struct tcpcb *tp;
+ struct ifnet *ifp;
+{
+#if INET6
+ struct inpcb *inp = tp->t_inpcb;
+ int isipv6 = (inp->inp_vflag & INP_IPV6) != 0;
+
+ if (isipv6) {
+ if (ifp && ifp->if_hwassist & IFNET_TSO_IPV6) {
+ tp->t_flags |= TF_TSO;
+ if (ifp->if_tso_v6_mtu != 0)
+ tp->tso_max_segment_size = ifp->if_tso_v6_mtu;
+ else
+ tp->tso_max_segment_size = TCP_MAXWIN;
+ } else
+ tp->t_flags &= ~TF_TSO;
+
+ } else
+#endif /* INET6 */
+
+ {
+ if (ifp && ifp->if_hwassist & IFNET_TSO_IPV4) {
+ tp->t_flags |= TF_TSO;
+ if (ifp->if_tso_v4_mtu != 0)
+ tp->tso_max_segment_size = ifp->if_tso_v4_mtu;
+ else
+ tp->tso_max_segment_size = TCP_MAXWIN;
+ } else
+ tp->t_flags &= ~TF_TSO;
+ }
+}
+
+#define TIMEVAL_TO_TCPHZ(_tv_) ((_tv_).tv_sec * TCP_RETRANSHZ + (_tv_).tv_usec / TCP_RETRANSHZ_TO_USEC)
+
+/* Function to calculate the tcp clock. The tcp clock will get updated
+ * at the boundaries of the tcp layer. This is done at 3 places:
+ * 1. Right before processing an input tcp packet
+ * 2. Whenever a connection wants to access the network using tcp_usrreqs
+ * 3. When a tcp timer fires or before tcp slow timeout
+ *
+ */
+
+void
+calculate_tcp_clock()
+{
+ struct timeval tv = tcp_uptime;
+ struct timeval interval = {0, TCP_RETRANSHZ_TO_USEC};
+ struct timeval now, hold_now;
+ uint32_t incr = 0;
+
+ timevaladd(&tv, &interval);
+ microuptime(&now);
+ if (timevalcmp(&now, &tv, >)) {
+ /* time to update the clock */
+ lck_spin_lock(tcp_uptime_lock);
+ if (timevalcmp(&tcp_uptime, &now, >=)) {
+ /* clock got updated while we were waiting for the lock */
+ lck_spin_unlock(tcp_uptime_lock);
+ return;
+ }
+
+ microuptime(&now);
+ hold_now = now;
+ tv = tcp_uptime;
+ timevalsub(&now, &tv);
+
+ incr = TIMEVAL_TO_TCPHZ(now);
+ if (incr > 0) {
+ tcp_uptime = hold_now;
+ tcp_now += incr;
+ }
+
+ lck_spin_unlock(tcp_uptime_lock);
+ }
+ return;
+}
+
+/* DSEP Review Done pl-20051213-v02 @3253,@3391,@3400 */
projects / apple / xnu.git / blobdiff