/*
- * Copyright (c) 2000-2015 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* 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
* 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.
- *
+ *
* 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,
* 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_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* SUCH DAMAGE.
*
* @(#)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
#include <net/if.h>
#include <net/content_filter.h>
-#define tcp_minmssoverload fring
-#define _IP_VHL
+#define tcp_minmssoverload fring
+#define _IP_VHL
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#if INET6
#include <netinet6/ipsec6.h>
#endif
-#endif /*IPSEC*/
+#endif /* IPSEC */
#if NECP
#include <net/necp.h>
#include <netinet/lro_ext.h>
-#define DBG_FNC_TCP_CLOSE NETDBG_CODE(DBG_NETTCP, ((5 << 8) | 2))
+#define DBG_FNC_TCP_CLOSE NETDBG_CODE(DBG_NETTCP, ((5 << 8) | 2))
extern int tcp_lq_overflow;
int tcp_mssdflt = TCP_MSS;
SYSCTL_INT(_net_inet_tcp, TCPCTL_MSSDFLT, mssdflt, CTLFLAG_RW | CTLFLAG_LOCKED,
- &tcp_mssdflt , 0, "Default TCP Maximum Segment Size");
+ &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 | CTLFLAG_LOCKED, &tcp_v6mssdflt , 0,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_v6mssdflt, 0,
"Default TCP Maximum Segment Size for IPv6");
#endif
extern int tcp_do_autorcvbuf;
-int tcp_sysctl_fastopenkey(struct sysctl_oid *, void *, int ,
+int tcp_sysctl_fastopenkey(struct sysctl_oid *, void *, int,
struct sysctl_req *);
-SYSCTL_PROC(_net_inet_tcp, OID_AUTO, fastopen_key,
- CTLTYPE_STRING | CTLFLAG_WR,
- 0 , 0, tcp_sysctl_fastopenkey, "S", "TCP Fastopen key");
+SYSCTL_PROC(_net_inet_tcp, OID_AUTO, fastopen_key, CTLTYPE_STRING | CTLFLAG_WR,
+ 0, 0, tcp_sysctl_fastopenkey, "S", "TCP Fastopen key");
/* Current count of half-open TFO connections */
int tcp_tfo_halfcnt = 0;
/* Maximum of half-open TFO connection backlog */
int tcp_tfo_backlog = 10;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, fastopen_backlog, CTLFLAG_RW | CTLFLAG_LOCKED,
- &tcp_tfo_backlog, 0, "Backlog queue for half-open TFO connections");
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, fastopen_backlog,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_tfo_backlog, 0,
+ "Backlog queue for half-open TFO connections");
int tcp_fastopen = TCP_FASTOPEN_CLIENT | TCP_FASTOPEN_SERVER;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, fastopen, CTLFLAG_RW | CTLFLAG_LOCKED,
- &tcp_fastopen, 0, "Enable TCP Fastopen (RFC 7413)");
+ &tcp_fastopen, 0, "Enable TCP Fastopen (RFC 7413)");
int tcp_tfo_fallback_min = 10;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, fastopen_fallback_min, CTLFLAG_RW | CTLFLAG_LOCKED,
- &tcp_tfo_fallback_min, 0, "Mininum number of trials without TFO when in fallback mode");
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, fastopen_fallback_min,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_tfo_fallback_min, 0,
+ "Mininum number of trials without TFO when in fallback mode");
/*
* Minimum MSS we accept and use. This prevents DoS attacks where
*/
int tcp_minmss = TCP_MINMSS;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, minmss, CTLFLAG_RW | CTLFLAG_LOCKED,
- &tcp_minmss , 0, "Minmum TCP Maximum Segment Size");
+ &tcp_minmss, 0, "Minmum TCP Maximum Segment Size");
int tcp_do_rfc1323 = 1;
#if (DEVELOPMENT || DEBUG)
SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1323, rfc1323,
- CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_do_rfc1323 , 0,
- "Enable rfc1323 (high performance TCP) extensions");
+ CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_do_rfc1323, 0,
+ "Enable rfc1323 (high performance TCP) extensions");
#endif /* (DEVELOPMENT || DEBUG) */
// Not used
static int tcp_do_rfc1644 = 0;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1644, rfc1644, CTLFLAG_RW | CTLFLAG_LOCKED,
- &tcp_do_rfc1644 , 0, "Enable rfc1644 (TTCP) extensions");
+SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1644, rfc1644,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_do_rfc1644, 0,
+ "Enable rfc1644 (TTCP) extensions");
static int 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, 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 | CTLFLAG_LOCKED,
- &tcbinfo.ipi_count, 0, "Number of active PCBs");
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, pcbcount, CTLFLAG_RD | CTLFLAG_LOCKED,
+ &tcbinfo.ipi_count, 0, "Number of active PCBs");
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, tw_pcbcount,
- CTLFLAG_RD | CTLFLAG_LOCKED,
- &tcbinfo.ipi_twcount, 0, "Number of pcbs in time-wait state");
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, tw_pcbcount, CTLFLAG_RD | CTLFLAG_LOCKED,
+ &tcbinfo.ipi_twcount, 0, "Number of pcbs in time-wait state");
static int icmp_may_rst = 1;
-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");
+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;
static int tcp_isn_reseed_interval = 0;
#if (DEVELOPMENT || DEBUG)
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, strict_rfc1948,
- CTLFLAG_RW | CTLFLAG_LOCKED,
- &tcp_strict_rfc1948, 0, "Determines if RFC1948 is followed exactly");
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, strict_rfc1948, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &tcp_strict_rfc1948, 0, "Determines if RFC1948 is followed exactly");
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");
+ CTLFLAG_RW | CTLFLAG_LOCKED,
+ &tcp_isn_reseed_interval, 0, "Seconds between reseeding of ISN secret");
#endif /* (DEVELOPMENT || DEBUG) */
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");
+ &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");
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, randomize_ports,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_use_randomport, 0,
+ "Randomize TCP port numbers");
__private_extern__ int tcp_win_scale = 3;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, win_scale_factor,
- CTLFLAG_RW | CTLFLAG_LOCKED,
- &tcp_win_scale, 0, "Window scaling factor");
+ CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_win_scale, 0,
+ "Window scaling factor");
static void tcp_cleartaocache(void);
static void tcp_notify(struct inpcb *, int);
extern int slowlink_wsize; /* window correction for slow links */
extern int path_mtu_discovery;
-extern u_int32_t tcp_autorcvbuf_max;
-extern u_int32_t tcp_autorcvbuf_inc_shift;
static void tcp_sbrcv_grow_rwin(struct tcpcb *tp, struct sockbuf *sb);
-#define TCP_BWMEAS_BURST_MINSIZE 6
-#define TCP_BWMEAS_BURST_MAXSIZE 25
+#define TCP_BWMEAS_BURST_MINSIZE 6
+#define TCP_BWMEAS_BURST_MAXSIZE 25
static uint32_t bwmeas_elm_size;
* variable net.inet.tcp.tcbhashsize
*/
#ifndef TCBHASHSIZE
-#define TCBHASHSIZE CONFIG_TCBHASHSIZE
+#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");
+ &tcp_tcbhashsize, 0, "Size of TCP control-block hashtable");
/*
* This is the actual shape of what we allocate using the zone
static void tcpcb_to_otcpcb(struct tcpcb *, struct otcpcb *);
-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 */
+static lck_attr_t *tcp_uptime_mtx_attr = NULL;
+static lck_grp_t *tcp_uptime_mtx_grp = NULL;
+static lck_grp_attr_t *tcp_uptime_mtx_grp_attr = NULL;
int tcp_notsent_lowat_check(struct socket *so);
static aes_encrypt_ctx tfo_ctx; /* Crypto-context for TFO */
__unused int arg2, struct sysctl_req *req)
{
int error = 0;
- /* TFO-key is expressed as a string in hex format (+1 to account for \0 char) */
+ /*
+ * TFO-key is expressed as a string in hex format
+ * (+1 to account for \0 char)
+ */
char keystring[TCP_FASTOPEN_KEYLEN * 2 + 1];
u_int32_t key[TCP_FASTOPEN_KEYLEN / sizeof(u_int32_t)];
int i;
goto exit;
}
- /* sysctl_io_string copies keystring into the oldptr of the sysctl_req.
+ /*
+ * sysctl_io_string copies keystring into the oldptr of the sysctl_req.
* Make sure everything is zero, to avoid putting garbage in there or
* leaking the stack.
*/
goto exit;
for (i = 0; i < (TCP_FASTOPEN_KEYLEN / sizeof(u_int32_t)); i++) {
- /* We jump over the keystring in 8-character (4 byte in hex) steps */
+ /*
+ * We jump over the keystring in 8-character (4 byte in hex)
+ * steps
+ */
if (sscanf(&keystring[i * 8], "%8x", &key[i]) != 1) {
error = EINVAL;
goto exit;
return (error);
}
-int get_inpcb_str_size(void)
+int
+get_inpcb_str_size(void)
{
- return sizeof(struct inpcb);
+ return (sizeof(struct inpcb));
}
-int get_tcp_str_size(void)
+int
+get_tcp_str_size(void)
{
- return sizeof(struct tcpcb);
+ return (sizeof(struct tcpcb));
}
int tcp_freeq(struct tcpcb *tp);
/*
* This helper routine returns one of the following scaled value of size:
- * 1. Rounded down power of two value of size if the size value passed as
+ * 1. Rounded down power of two value of size if the size value passed as
* argument is not a power of two and the rounded up value overflows.
* OR
- * 2. Rounded up power of two value of size if the size value passed as
- * argument is not a power of two and the rounded up value does not overflow
+ * 2. Rounded up power of two value of size if the size value passed as
+ * argument is not a power of two and the rounded up value does not overflow
* OR
* 3. Same value as argument size if it is already a power of two.
- */
-static int scale_to_powerof2(int size) {
+ */
+static int
+scale_to_powerof2(int size) {
/* Handle special case of size = 0 */
int ret = size ? size : 1;
if (!powerof2(ret)) {
- while(!powerof2(size)) {
- /*
+ while (!powerof2(size)) {
+ /*
* Clear out least significant
* set bit till size is left with
* its highest set bit at which point
* it is rounded down power of two.
- */
+ */
size = size & (size -1);
}
}
}
- return ret;
+ return (ret);
}
static void
-tcp_tfo_init()
+tcp_tfo_init(void)
{
u_char key[TCP_FASTOPEN_KEYLEN];
{
#pragma unused(dp)
static int tcp_initialized = 0;
- vm_size_t str_size;
+ vm_size_t str_size;
struct inpcbinfo *pcbinfo;
VERIFY((pp->pr_flags & (PR_INITIALIZED|PR_ATTACHED)) == PR_ATTACHED);
microuptime(&tcp_uptime);
read_random(&tcp_now, sizeof(tcp_now));
- tcp_now = tcp_now & 0x3fffffff; /* Starts tcp internal clock at a random value */
+
+ /* Starts tcp internal clock at a random value */
+ tcp_now = tcp_now & 0x3fffffff;
tcp_tfo_init();
* allocate lock group attribute and group for tcp pcb mutexes
*/
pcbinfo->ipi_lock_grp_attr = lck_grp_attr_alloc_init();
- pcbinfo->ipi_lock_grp = lck_grp_alloc_init("tcppcb", pcbinfo->ipi_lock_grp_attr);
+ pcbinfo->ipi_lock_grp = lck_grp_alloc_init("tcppcb",
+ pcbinfo->ipi_lock_grp_attr);
/*
* allocate the lock attribute for tcp pcb mutexes
tcp_tcbhashsize);
}
- tcbinfo.ipi_hashbase = hashinit(tcp_tcbhashsize, M_PCB, &tcbinfo.ipi_hashmask);
+ tcbinfo.ipi_hashbase = hashinit(tcp_tcbhashsize, M_PCB,
+ &tcbinfo.ipi_hashmask);
tcbinfo.ipi_porthashbase = hashinit(tcp_tcbhashsize, M_PCB,
&tcbinfo.ipi_porthashmask);
str_size = P2ROUNDUP(sizeof(struct inp_tp), sizeof(u_int64_t));
in_pcbinfo_attach(&tcbinfo);
str_size = P2ROUNDUP(sizeof(struct sackhole), sizeof(u_int64_t));
- sack_hole_zone = zinit(str_size, 120000*str_size, 8192, "sack_hole zone");
+ 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);
zone_change(tcp_reass_zone, Z_EXPAND, TRUE);
bwmeas_elm_size = P2ROUNDUP(sizeof(struct bwmeas), sizeof(u_int64_t));
- tcp_bwmeas_zone = zinit(bwmeas_elm_size, (100 * bwmeas_elm_size), 0, "tcp_bwmeas_zone");
+ tcp_bwmeas_zone = zinit(bwmeas_elm_size, (100 * bwmeas_elm_size), 0,
+ "tcp_bwmeas_zone");
if (tcp_bwmeas_zone == NULL) {
panic("%s: failed allocating tcp_bwmeas_zone", __func__);
/* NOTREACHED */
zone_change(tcp_rxt_seg_zone, Z_EXPAND, TRUE);
#if INET6
-#define TCP_MINPROTOHDR (sizeof(struct ip6_hdr) + sizeof(struct tcphdr))
+#define TCP_MINPROTOHDR (sizeof(struct ip6_hdr) + sizeof(struct tcphdr))
#else /* INET6 */
-#define TCP_MINPROTOHDR (sizeof(struct tcpiphdr))
+#define TCP_MINPROTOHDR (sizeof(struct tcpiphdr))
#endif /* INET6 */
if (max_protohdr < TCP_MINPROTOHDR) {
_max_protohdr = TCP_MINPROTOHDR;
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
+ * 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_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) {
+ 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");
};
- if ((tcp_timer_list.call = thread_call_allocate(tcp_run_timerlist, NULL)) == NULL) {
+ tcp_timer_list.call = thread_call_allocate(tcp_run_timerlist, NULL);
+ if (tcp_timer_list.call == NULL) {
panic("failed to allocate call entry 1 in tcp_init\n");
}
/*
- * allocate lock group attribute, group and attribute for tcp_uptime_lock
+ * 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_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);
+ tcp_uptime_lock = lck_spin_alloc_init(tcp_uptime_mtx_grp,
+ tcp_uptime_mtx_attr);
/* Initialize TCP LRO data structures */
tcp_lro_init();
if (nmbclusters > 30720) {
tcp_autorcvbuf_max = 1024 * 1024;
tcp_autosndbuf_max = 1024 * 1024;
+
+ /*
+ * Receive buffer max for cellular interfaces supporting
+ * Carrier Aggregation is higher
+ */
+ tcp_autorcvbuf_max_ca = 2 * 1024 * 1024;
}
}
* of the tcpcb each time to conserve mbufs.
*/
void
-tcp_fillheaders(tp, ip_ptr, tcp_ptr)
- struct tcpcb *tp;
- void *ip_ptr;
- void *tcp_ptr;
+tcp_fillheaders(struct tcpcb *tp, void *ip_ptr, void *tcp_ptr)
{
struct inpcb *inp = tp->t_inpcb;
struct tcphdr *tcp_hdr = (struct tcphdr *)tcp_ptr;
(inp->inp_flow & IPV6_FLOWINFO_MASK);
ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
(IPV6_VERSION & IPV6_VERSION_MASK);
+ ip6->ip6_plen = htons(sizeof(struct tcphdr));
ip6->ip6_nxt = IPPROTO_TCP;
- ip6->ip6_plen = sizeof(struct tcphdr);
+ ip6->ip6_hlim = 0;
ip6->ip6_src = inp->in6p_laddr;
ip6->ip6_dst = inp->in6p_faddr;
tcp_hdr->th_sum = in6_pseudo(&inp->in6p_laddr, &inp->in6p_faddr,
} else
#endif
{
- struct ip *ip = (struct ip *) ip_ptr;
-
- ip->ip_vhl = IP_VHL_BORING;
- ip->ip_tos = 0;
- ip->ip_len = 0;
- ip->ip_id = 0;
- ip->ip_off = 0;
- ip->ip_ttl = 0;
- ip->ip_sum = 0;
- ip->ip_p = IPPROTO_TCP;
- ip->ip_src = inp->inp_laddr;
- ip->ip_dst = inp->inp_faddr;
- tcp_hdr->th_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr,
- htons(sizeof(struct tcphdr) + IPPROTO_TCP));
+ struct ip *ip = (struct ip *) ip_ptr;
+
+ ip->ip_vhl = IP_VHL_BORING;
+ ip->ip_tos = 0;
+ ip->ip_len = 0;
+ ip->ip_id = 0;
+ ip->ip_off = 0;
+ ip->ip_ttl = 0;
+ ip->ip_sum = 0;
+ ip->ip_p = IPPROTO_TCP;
+ ip->ip_src = inp->inp_laddr;
+ ip->ip_dst = inp->inp_faddr;
+ tcp_hdr->th_sum =
+ in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr,
+ htons(sizeof(struct tcphdr) + IPPROTO_TCP));
}
tcp_hdr->th_sport = inp->inp_lport;
* use for this function is in keepalives, which use tcp_respond.
*/
struct tcptemp *
-tcp_maketemplate(tp)
- struct tcpcb *tp;
+tcp_maketemplate(struct tcpcb *tp)
{
struct mbuf *m;
struct tcptemp *n;
int isipv6;
#endif /* INET6 */
struct ifnet *outif;
+ int sotc = SO_TC_UNSPEC;
#if INET6
isipv6 = IP_VHL_V(((struct ip *)ipgen)->ip_vhl) == 6;
#if INET6
if (isipv6) {
ro6 = &sro6;
- bzero(ro6, sizeof *ro6);
+ bzero(ro6, sizeof(*ro6));
} else
#endif /* INET6 */
{
ro = &sro;
- bzero(ro, sizeof *ro);
+ bzero(ro, sizeof(*ro));
}
}
if (m == 0) {
if (isipv6) {
VERIFY((MHLEN - max_linkhdr) >=
(sizeof (*ip6) + sizeof (*nth)));
- bcopy((caddr_t)ip6, mtod(m, caddr_t),
- sizeof(struct ip6_hdr));
+ bcopy((caddr_t)ip6, mtod(m, caddr_t),
+ sizeof(struct ip6_hdr));
ip6 = mtod(m, struct ip6_hdr *);
nth = (struct tcphdr *)(void *)(ip6 + 1);
} else
m->m_data = (caddr_t)ipgen;
/* m_len is set later */
tlen = 0;
-#define xchg(a,b,type) { type t; t=a; a=b; b=t; }
+#define xchg(a, b, type) { type t; t = a; a = b; b = t; }
#if INET6
if (isipv6) {
/* Expect 32-bit aligned IP on strict-align platforms */
nth = (struct tcphdr *)(void *)(ip6 + 1);
} else
#endif /* INET6 */
- {
- /* Expect 32-bit aligned IP on strict-align platforms */
- IP_HDR_STRICT_ALIGNMENT_CHECK(ip);
- xchg(ip->ip_dst.s_addr, ip->ip_src.s_addr, n_long);
- nth = (struct tcphdr *)(void *)(ip + 1);
- }
+ {
+ /* Expect 32-bit aligned IP on strict-align platforms */
+ IP_HDR_STRICT_ALIGNMENT_CHECK(ip);
+ xchg(ip->ip_dst.s_addr, ip->ip_src.s_addr, n_long);
+ nth = (struct tcphdr *)(void *)(ip + 1);
+ }
if (th != nth) {
/*
* this is usually a case when an extension header
tlen += sizeof (struct ip6_hdr) + sizeof (struct tcphdr);
} else
#endif
- {
- tlen += sizeof (struct tcpiphdr);
- ip->ip_len = tlen;
- ip->ip_ttl = ip_defttl;
- }
+ {
+ tlen += sizeof (struct tcpiphdr);
+ ip->ip_len = tlen;
+ ip->ip_ttl = ip_defttl;
+ }
m->m_len = tlen;
m->m_pkthdr.len = tlen;
m->m_pkthdr.rcvif = 0;
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 :
- NULL);
+ ro6 && ro6->ro_rt ? ro6->ro_rt->rt_ifp : NULL);
} else
#endif /* INET6 */
{
if (isipv6) {
svc_flags |= PKT_SCF_IPV6;
}
+ sotc = tp->t_inpcb->inp_socket->so_traffic_class;
set_packet_service_class(m, tp->t_inpcb->inp_socket,
- MBUF_SC_UNSPEC, svc_flags);
+ sotc, svc_flags);
/* Embed flowhash and flow control flags */
m->m_pkthdr.pkt_flowsrc = FLOWSRC_INPCB;
#if INET6
if (isipv6) {
struct ip6_out_args ip6oa = { tra->ifscope, { 0 },
- IP6OAF_SELECT_SRCIF | IP6OAF_BOUND_SRCADDR, 0 };
+ IP6OAF_SELECT_SRCIF | IP6OAF_BOUND_SRCADDR, 0,
+ SO_TC_UNSPEC, _NET_SERVICE_TYPE_UNSPEC};
if (tra->ifscope != IFSCOPE_NONE)
ip6oa.ip6oa_flags |= IP6OAF_BOUND_IF;
ip6oa.ip6oa_flags |= IP6OAF_NO_EXPENSIVE;
if (tra->awdl_unrestricted)
ip6oa.ip6oa_flags |= IP6OAF_AWDL_UNRESTRICTED;
-
+ if (tra->intcoproc_allowed)
+ ip6oa.ip6oa_flags |= IP6OAF_INTCOPROC_ALLOWED;
+ ip6oa.ip6oa_sotc = sotc;
+ if (tp != NULL) {
+ if ((tp->t_inpcb->inp_socket->so_flags1 & SOF1_QOSMARKING_ALLOWED))
+ ip6oa.ip6oa_flags |= IP6OAF_QOSMARKING_ALLOWED;
+ ip6oa.ip6oa_netsvctype = tp->t_inpcb->inp_socket->so_netsvctype;
+ }
(void) ip6_output(m, NULL, ro6, IPV6_OUTARGS, NULL,
NULL, &ip6oa);
#endif /* INET6 */
{
struct ip_out_args ipoa = { tra->ifscope, { 0 },
- IPOAF_SELECT_SRCIF | IPOAF_BOUND_SRCADDR, 0 };
+ IPOAF_SELECT_SRCIF | IPOAF_BOUND_SRCADDR, 0,
+ SO_TC_UNSPEC, _NET_SERVICE_TYPE_UNSPEC };
if (tra->ifscope != IFSCOPE_NONE)
ipoa.ipoa_flags |= IPOAF_BOUND_IF;
ipoa.ipoa_flags |= IPOAF_NO_EXPENSIVE;
if (tra->awdl_unrestricted)
ipoa.ipoa_flags |= IPOAF_AWDL_UNRESTRICTED;
-
+ ipoa.ipoa_sotc = sotc;
+ if (tp != NULL) {
+ if ((tp->t_inpcb->inp_socket->so_flags1 & SOF1_QOSMARKING_ALLOWED))
+ ipoa.ipoa_flags |= IPOAF_QOSMARKING_ALLOWED;
+ ipoa.ipoa_netsvctype = tp->t_inpcb->inp_socket->so_netsvctype;
+ }
if (ro != &sro) {
/* Copy the cached route and take an extra reference */
inp_route_copyout(tp->t_inpcb, &sro);
* come from the zone allocator set up in tcp_init().
*/
struct tcpcb *
-tcp_newtcpcb(inp)
- struct inpcb *inp;
+tcp_newtcpcb(struct inpcb *inp)
{
struct inp_tp *it;
- register struct tcpcb *tp;
- register struct socket *so = inp->inp_socket;
+ struct tcpcb *tp;
+ struct socket *so = inp->inp_socket;
#if INET6
int isipv6 = (inp->inp_vflag & INP_IPV6) != 0;
#endif /* INET6 */
calculate_tcp_clock();
if ((so->so_flags1 & SOF1_CACHED_IN_SOCK_LAYER) == 0) {
- it = (struct inp_tp *)(void *)inp;
- tp = &it->tcb;
+ it = (struct inp_tp *)(void *)inp;
+ tp = &it->tcb;
} else {
- tp = (struct tcpcb *)(void *)inp->inp_saved_ppcb;
+ tp = (struct tcpcb *)(void *)inp->inp_saved_ppcb;
}
-
+
bzero((char *) tp, sizeof(struct tcpcb));
LIST_INIT(&tp->t_segq);
tp->t_maxseg = tp->t_maxopd =
TAILQ_INIT(&tp->snd_holes);
SLIST_INIT(&tp->t_rxt_segments);
- tp->t_inpcb = inp; /* XXX */
+ SLIST_INIT(&tp->t_notify_ack);
+ tp->t_inpcb = inp;
/*
* Init srtt to TCPTV_SRTTBASE (0), so we can tell that we have no
* rtt estimate. Set rttvar so that srtt + 4 * rttvar gives
* reasonable initial retransmit time.
*/
tp->t_srtt = TCPTV_SRTTBASE;
- tp->t_rttvar = ((TCPTV_RTOBASE - TCPTV_SRTTBASE) << TCP_RTTVAR_SHIFT) / 4;
+ tp->t_rttvar =
+ ((TCPTV_RTOBASE - TCPTV_SRTTBASE) << TCP_RTTVAR_SHIFT) / 4;
tp->t_rttmin = tcp_TCPTV_MIN;
tp->t_rxtcur = TCPTV_RTOBASE;
* then send a RST to peer.
*/
struct tcpcb *
-tcp_drop(tp, errno)
- register struct tcpcb *tp;
- int errno;
+tcp_drop(struct tcpcb *tp, int errno)
{
struct socket *so = tp->t_inpcb->inp_socket;
#if CONFIG_DTRACE
}
void
-tcp_getrt_rtt(struct tcpcb *tp, struct rtentry *rt)
+tcp_getrt_rtt(struct tcpcb *tp, struct rtentry *rt)
{
u_int32_t rtt = rt->rt_rmx.rmx_rtt;
int isnetlocal = (tp->t_flags & TF_LOCAL);
if (rt->rt_rmx.rmx_locks & RTV_RTT)
tp->t_rttmin = rtt / (RTM_RTTUNIT / TCP_RETRANSHZ);
else
- tp->t_rttmin = isnetlocal ? tcp_TCPTV_MIN : TCPTV_REXMTMIN;
- tp->t_srtt = rtt / (RTM_RTTUNIT / (TCP_RETRANSHZ * TCP_RTT_SCALE));
+ tp->t_rttmin = isnetlocal ? tcp_TCPTV_MIN :
+ TCPTV_REXMTMIN;
+ tp->t_srtt =
+ rtt / (RTM_RTTUNIT / (TCP_RETRANSHZ * TCP_RTT_SCALE));
tcpstat.tcps_usedrtt++;
if (rt->rt_rmx.rmx_rttvar) {
tp->t_rttvar = rt->rt_rmx.rmx_rttvar /
- (RTM_RTTUNIT / (TCP_RETRANSHZ * TCP_RTTVAR_SCALE));
+ (RTM_RTTUNIT / (TCP_RETRANSHZ * TCP_RTTVAR_SCALE));
tcpstat.tcps_usedrttvar++;
} else {
/* default variation is +- 1 rtt */
tp->t_rttvar =
- tp->t_srtt * TCP_RTTVAR_SCALE / TCP_RTT_SCALE;
+ tp->t_srtt * TCP_RTTVAR_SCALE / TCP_RTT_SCALE;
}
TCPT_RANGESET(tp->t_rxtcur,
((tp->t_srtt >> 2) + tp->t_rttvar) >> 1,
}
}
+static inline void
+tcp_update_ecn_perf_stats(struct tcpcb *tp,
+ struct if_tcp_ecn_perf_stat *stat)
+{
+ u_int64_t curval, oldval;
+ struct inpcb *inp = tp->t_inpcb;
+ stat->total_txpkts += inp->inp_stat->txpackets;
+ stat->total_rxpkts += inp->inp_stat->rxpackets;
+ stat->total_rxmitpkts += tp->t_stat.rxmitpkts;
+ stat->total_oopkts += tp->t_rcvoopack;
+ stat->total_reorderpkts += (tp->t_reordered_pkts + tp->t_pawsdrop +
+ tp->t_dsack_sent + tp->t_dsack_recvd);
+
+ /* Average RTT */
+ curval = (tp->t_srtt >> TCP_RTT_SHIFT);
+ if (curval > 0 && tp->t_rttupdated >= 16) {
+ if (stat->rtt_avg == 0) {
+ stat->rtt_avg = curval;
+ } else {
+ oldval = stat->rtt_avg;
+ stat->rtt_avg =
+ ((oldval << 4) - oldval + curval) >> 4;
+ }
+ }
+
+ /* RTT variance */
+ curval = tp->t_rttvar >> TCP_RTTVAR_SHIFT;
+ if (curval > 0 && tp->t_rttupdated >= 16) {
+ if (stat->rtt_var == 0) {
+ stat->rtt_var = curval;
+ } else {
+ oldval = stat->rtt_var;
+ stat->rtt_var =
+ ((oldval << 4) - oldval + curval) >> 4;
+ }
+ }
+
+ /* Total number of SACK recovery episodes */
+ stat->sack_episodes += tp->t_sack_recovery_episode;
+
+ if (inp->inp_socket->so_error == ECONNRESET)
+ stat->rst_drop++;
+}
+
/*
* Close a TCP control block:
* discard all space held by the tcp
* wake up any sleepers
*/
struct tcpcb *
-tcp_close(tp)
- register struct tcpcb *tp;
+tcp_close(struct tcpcb *tp)
{
struct inpcb *inp = tp->t_inpcb;
struct socket *so = inp->inp_socket;
int dosavessthresh;
/* tcp_close was called previously, bail */
- if (inp->inp_ppcb == NULL)
- return(NULL);
+ if (inp->inp_ppcb == NULL)
+ return (NULL);
tcp_canceltimers(tp);
- KERNEL_DEBUG(DBG_FNC_TCP_CLOSE | DBG_FUNC_START, tp,0,0,0,0);
+ 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
* update anything that the user "locked".
*/
if (tp->t_rttupdated >= 16) {
- register u_int32_t i = 0;
+ u_int32_t i = 0;
#if INET6
if (isipv6) {
else
dosavessthresh = (i < so->so_snd.sb_hiwat / 2);
if (((rt->rt_rmx.rmx_locks & RTV_SSTHRESH) == 0 &&
- i != 0 && rt->rt_rmx.rmx_ssthresh != 0)
- || dosavessthresh) {
+ i != 0 && rt->rt_rmx.rmx_ssthresh != 0) ||
+ dosavessthresh) {
/*
* convert the limit from user data bytes to
* packets then to packet data bytes.
i = 2;
i *= (u_int32_t)(tp->t_maxseg +
#if INET6
- (isipv6 ? sizeof (struct ip6_hdr) +
- sizeof (struct tcphdr) :
-#endif
- sizeof (struct tcpiphdr)
-#if INET6
- )
-#endif
- );
+ isipv6 ? sizeof (struct ip6_hdr) +
+ sizeof (struct tcphdr) :
+#endif /* INET6 */
+ sizeof (struct tcpiphdr));
if (rt->rt_rmx.rmx_ssthresh)
rt->rt_rmx.rmx_ssthresh =
(rt->rt_rmx.rmx_ssthresh + i) / 2;
/* free the reassembly queue, if any */
(void) tcp_freeq(tp);
+
+ /* Collect ECN related statistics */
+ if (tp->ecn_flags & TE_SETUPSENT) {
+ if (tp->ecn_flags & TE_CLIENT_SETUP) {
+ INP_INC_IFNET_STAT(inp, ecn_client_setup);
+ if (TCP_ECN_ENABLED(tp)) {
+ INP_INC_IFNET_STAT(inp,
+ ecn_client_success);
+ } else if (tp->ecn_flags & TE_LOST_SYN) {
+ INP_INC_IFNET_STAT(inp, ecn_syn_lost);
+ } else {
+ INP_INC_IFNET_STAT(inp,
+ ecn_peer_nosupport);
+ }
+ } else {
+ INP_INC_IFNET_STAT(inp, ecn_server_setup);
+ if (TCP_ECN_ENABLED(tp)) {
+ INP_INC_IFNET_STAT(inp,
+ ecn_server_success);
+ } else if (tp->ecn_flags & TE_LOST_SYNACK) {
+ INP_INC_IFNET_STAT(inp,
+ ecn_synack_lost);
+ } else {
+ INP_INC_IFNET_STAT(inp,
+ ecn_peer_nosupport);
+ }
+ }
+ } else {
+ INP_INC_IFNET_STAT(inp, ecn_off_conn);
+ }
if (TCP_ECN_ENABLED(tp)) {
- if (tp->ecn_flags & TE_RECV_ECN_CE)
+ if (tp->ecn_flags & TE_RECV_ECN_CE) {
tcpstat.tcps_ecn_conn_recv_ce++;
- if (tp->ecn_flags & TE_RECV_ECN_ECE)
+ INP_INC_IFNET_STAT(inp, ecn_conn_recv_ce);
+ }
+ if (tp->ecn_flags & TE_RECV_ECN_ECE) {
tcpstat.tcps_ecn_conn_recv_ece++;
+ INP_INC_IFNET_STAT(inp, ecn_conn_recv_ece);
+ }
if (tp->ecn_flags & (TE_RECV_ECN_CE | TE_RECV_ECN_ECE)) {
if (tp->t_stat.txretransmitbytes > 0 ||
- tp->t_stat.rxoutoforderbytes > 0)
+ tp->t_stat.rxoutoforderbytes > 0) {
tcpstat.tcps_ecn_conn_pl_ce++;
- else
+ INP_INC_IFNET_STAT(inp, ecn_conn_plce);
+ } else {
tcpstat.tcps_ecn_conn_nopl_ce++;
+ INP_INC_IFNET_STAT(inp, ecn_conn_noplce);
+ }
} else {
if (tp->t_stat.txretransmitbytes > 0 ||
- tp->t_stat.rxoutoforderbytes > 0)
+ tp->t_stat.rxoutoforderbytes > 0) {
tcpstat.tcps_ecn_conn_plnoce++;
+ INP_INC_IFNET_STAT(inp, ecn_conn_plnoce);
+ }
+ }
+ }
+
+ /* Aggregate performance stats */
+ if (inp->inp_last_outifp != NULL && !(tp->t_flags & TF_LOCAL)) {
+ struct ifnet *ifp = inp->inp_last_outifp;
+ ifnet_lock_shared(ifp);
+ if ((ifp->if_refflags & (IFRF_ATTACHED | IFRF_DETACHING)) ==
+ IFRF_ATTACHED) {
+ if (inp->inp_vflag & INP_IPV6) {
+ ifp->if_ipv6_stat->timestamp = net_uptime();
+ if (TCP_ECN_ENABLED(tp)) {
+ tcp_update_ecn_perf_stats(tp,
+ &ifp->if_ipv6_stat->ecn_on);
+ } else {
+ tcp_update_ecn_perf_stats(tp,
+ &ifp->if_ipv6_stat->ecn_off);
+ }
+ } else {
+ ifp->if_ipv4_stat->timestamp = net_uptime();
+ if (TCP_ECN_ENABLED(tp)) {
+ tcp_update_ecn_perf_stats(tp,
+ &ifp->if_ipv4_stat->ecn_on);
+ } else {
+ tcp_update_ecn_perf_stats(tp,
+ &ifp->if_ipv4_stat->ecn_off);
+ }
+ }
}
+ ifnet_lock_done(ifp);
}
tcp_free_sackholes(tp);
+ tcp_notify_ack_free(tp);
+
+ inp_decr_sndbytes_allunsent(so, tp->snd_una);
+
if (tp->t_bwmeas != NULL) {
tcp_bwmeas_free(tp);
}
tp->t_state = TCPS_CLOSED;
- /* Issue a wakeup before detach so that we don't miss
+ /*
+ * Issue a wakeup before detach so that we don't miss
* a wakeup
*/
sodisconnectwakeup(so);
- /*
- * Clean up any LRO state
+ /*
+ * Clean up any LRO state
*/
if (tp->t_flagsext & TF_LRO_OFFLOADED) {
tcp_lro_remove_state(inp->inp_laddr, inp->inp_faddr,
#endif /* INET6 */
in_pcbdetach(inp);
- /* Call soisdisconnected after detach because it might unlock the socket */
+ /*
+ * 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(NULL);
+ return (NULL);
}
int
-tcp_freeq(tp)
- struct tcpcb *tp;
+tcp_freeq(struct tcpcb *tp)
{
-
- register struct tseg_qent *q;
+ struct tseg_qent *q;
int rv = 0;
- while((q = LIST_FIRST(&tp->t_segq)) != NULL) {
+ while ((q = LIST_FIRST(&tp->t_segq)) != NULL) {
LIST_REMOVE(q, tqe_q);
m_freem(q->tqe_m);
zfree(tcp_reass_zone, q);
* Do it next time if the pcbinfo lock is in use
*/
void
-tcp_drain()
+tcp_drain(void)
{
struct inpcb *inp;
struct tcpcb *tp;
- if (!lck_rw_try_lock_exclusive(tcbinfo.ipi_lock))
+ if (!lck_rw_try_lock_exclusive(tcbinfo.ipi_lock))
return;
LIST_FOREACH(inp, tcbinfo.ipi_listhead, inp_list) {
/* lost a race, try the next one */
tcp_unlock(inp->inp_socket, 1, 0);
continue;
- }
+ }
tp = intotcpcb(inp);
- if (do_tcpdrain)
+ if (do_tcpdrain)
tcp_freeq(tp);
so_drain_extended_bk_idle(inp->inp_socket);
* reporting soft errors (yet - a kqueue filter may be added).
*/
static void
-tcp_notify(inp, error)
- struct inpcb *inp;
- int error;
+tcp_notify(struct inpcb *inp, int error)
{
struct tcpcb *tp;
- if (inp == NULL || (inp->inp_state == INPCB_STATE_DEAD))
+ if (inp == NULL || (inp->inp_state == INPCB_STATE_DEAD))
return; /* pcb is gone already */
tp = (struct tcpcb *)inp->inp_ppcb;
* can never complete.
*/
if (tp->t_state == TCPS_ESTABLISHED &&
- (error == EHOSTUNREACH || error == ENETUNREACH ||
- error == EHOSTDOWN)) {
+ (error == EHOSTUNREACH || error == ENETUNREACH ||
+ error == EHOSTDOWN)) {
return;
} else if (tp->t_state < TCPS_ESTABLISHED && tp->t_rxtshift > 3 &&
tp->t_softerror)
#endif
}
-struct bwmeas*
+struct bwmeas *
tcp_bwmeas_alloc(struct tcpcb *tp)
{
struct bwmeas *elm;
elm = zalloc(tcp_bwmeas_zone);
if (elm == NULL)
- return(elm);
+ return (elm);
bzero(elm, bwmeas_elm_size);
elm->bw_minsizepkts = TCP_BWMEAS_BURST_MINSIZE;
elm->bw_maxsizepkts = TCP_BWMEAS_BURST_MAXSIZE;
elm->bw_minsize = elm->bw_minsizepkts * tp->t_maxseg;
elm->bw_maxsize = elm->bw_maxsizepkts * tp->t_maxseg;
- return(elm);
+ return (elm);
}
void
-tcp_bwmeas_free(struct tcpcb* tp)
+tcp_bwmeas_free(struct tcpcb *tp)
{
zfree(tcp_bwmeas_zone, tp->t_bwmeas);
tp->t_bwmeas = NULL;
tp->t_flagsext &= ~(TF_MEASURESNDBW);
}
+int
+get_tcp_inp_list(struct inpcb **inp_list, int n, inp_gen_t gencnt)
+{
+ struct tcpcb *tp;
+ struct inpcb *inp;
+ int i = 0;
+
+ LIST_FOREACH(inp, tcbinfo.ipi_listhead, inp_list) {
+ if (inp->inp_gencnt <= gencnt &&
+ inp->inp_state != INPCB_STATE_DEAD)
+ inp_list[i++] = inp;
+ if (i >= n)
+ break;
+ }
+
+ TAILQ_FOREACH(tp, &tcp_tw_tailq, t_twentry) {
+ inp = tp->t_inpcb;
+ if (inp->inp_gencnt <= gencnt &&
+ inp->inp_state != INPCB_STATE_DEAD)
+ inp_list[i++] = inp;
+ if (i >= n)
+ break;
+ }
+ return (i);
+}
+
/*
* 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.
otp->t_timer[TCPT_PERSIST_EXT] = tp->t_timer[TCPT_PERSIST];
otp->t_timer[TCPT_KEEP_EXT] = tp->t_timer[TCPT_KEEP];
otp->t_timer[TCPT_2MSL_EXT] = tp->t_timer[TCPT_2MSL];
- otp->t_inpcb = (_TCPCB_PTR(struct inpcb *))VM_KERNEL_ADDRPERM(tp->t_inpcb);
+ otp->t_inpcb =
+ (_TCPCB_PTR(struct inpcb *))VM_KERNEL_ADDRPERM(tp->t_inpcb);
otp->t_state = tp->t_state;
otp->t_flags = tp->t_flags;
otp->t_force = (tp->t_flagsext & TF_FORCE) ? 1 : 0;
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->cc_send = 0;
+ otp->cc_recv = 0;
otp->snd_recover = tp->snd_recover;
otp->snd_cwnd_prev = tp->snd_cwnd_prev;
otp->snd_ssthresh_prev = tp->snd_ssthresh_prev;
{
#pragma unused(oidp, arg1, arg2)
int error, i = 0, n;
- struct inpcb *inp, **inp_list;
- struct tcpcb *tp;
+ struct inpcb **inp_list;
inp_gen_t gencnt;
struct xinpgen xig;
lck_rw_lock_shared(tcbinfo.ipi_lock);
if (req->oldptr == USER_ADDR_NULL) {
n = tcbinfo.ipi_count;
- req->oldidx = 2 * (sizeof xig)
+ req->oldidx = 2 * (sizeof(xig))
+ (n + n/8) * sizeof(struct xtcpcb);
lck_rw_done(tcbinfo.ipi_lock);
- return 0;
+ return (0);
}
if (req->newptr != USER_ADDR_NULL) {
lck_rw_done(tcbinfo.ipi_lock);
- return EPERM;
+ return (EPERM);
}
/*
n = tcbinfo.ipi_count;
bzero(&xig, sizeof(xig));
- xig.xig_len = 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);
+ error = SYSCTL_OUT(req, &xig, sizeof(xig));
if (error) {
lck_rw_done(tcbinfo.ipi_lock);
- return error;
+ return (error);
}
/*
* We are done if there is no pcb
*/
if (n == 0) {
lck_rw_done(tcbinfo.ipi_lock);
- return 0;
+ return (0);
}
- inp_list = _MALLOC(n * sizeof *inp_list, M_TEMP, M_WAITOK);
+ inp_list = _MALLOC(n * sizeof (*inp_list), M_TEMP, M_WAITOK);
if (inp_list == 0) {
lck_rw_done(tcbinfo.ipi_lock);
- return ENOMEM;
- }
-
- LIST_FOREACH(inp, tcbinfo.ipi_listhead, inp_list) {
- if (inp->inp_gencnt <= gencnt &&
- inp->inp_state != INPCB_STATE_DEAD)
- inp_list[i++] = inp;
- if (i >= n) break;
+ return (ENOMEM);
}
- TAILQ_FOREACH(tp, &tcp_tw_tailq, t_twentry) {
- inp = tp->t_inpcb;
- if (inp->inp_gencnt <= gencnt &&
- inp->inp_state != INPCB_STATE_DEAD)
- inp_list[i++] = inp;
- if (i >= n) break;
- }
-
- n = i;
+ n = get_tcp_inp_list(inp_list, n, gencnt);
error = 0;
for (i = 0; i < n; i++) {
+ struct xtcpcb xt;
+ caddr_t inp_ppcb;
+ struct inpcb *inp;
+
inp = inp_list[i];
- if (inp->inp_gencnt <= gencnt &&
- inp->inp_state != INPCB_STATE_DEAD) {
- struct xtcpcb xt;
- caddr_t inp_ppcb;
-
- bzero(&xt, sizeof(xt));
- xt.xt_len = sizeof xt;
- /* XXX should avoid extra copy */
- inpcb_to_compat(inp, &xt.xt_inp);
- inp_ppcb = inp->inp_ppcb;
- if (inp_ppcb != NULL) {
- tcpcb_to_otcpcb(
- (struct tcpcb *)(void *)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);
+
+ if (in_pcb_checkstate(inp, WNT_ACQUIRE, 0) == WNT_STOPUSING)
+ continue;
+ tcp_lock(inp->inp_socket, 1, NULL);
+ if (in_pcb_checkstate(inp, WNT_RELEASE, 1) == WNT_STOPUSING) {
+ tcp_unlock(inp->inp_socket, 1, NULL);
+ continue;
+ }
+ if (inp->inp_gencnt > gencnt) {
+ tcp_unlock(inp->inp_socket, 1, NULL);
+ continue;
+ }
+
+ bzero(&xt, sizeof(xt));
+ xt.xt_len = sizeof(xt);
+ /* XXX should avoid extra copy */
+ inpcb_to_compat(inp, &xt.xt_inp);
+ inp_ppcb = inp->inp_ppcb;
+ if (inp_ppcb != NULL) {
+ tcpcb_to_otcpcb((struct tcpcb *)(void *)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);
+
+ tcp_unlock(inp->inp_socket, 1, NULL);
+
+ error = SYSCTL_OUT(req, &xt, sizeof(xt));
}
if (!error) {
/*
* might be necessary to retry.
*/
bzero(&xig, sizeof(xig));
- xig.xig_len = 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);
+ error = SYSCTL_OUT(req, &xig, sizeof(xig));
}
FREE(inp_list, M_TEMP);
lck_rw_done(tcbinfo.ipi_lock);
- return error;
+ return (error);
}
SYSCTL_PROC(_net_inet_tcp, TCPCTL_PCBLIST, pcblist,
static void
tcpcb_to_xtcpcb64(struct tcpcb *tp, struct xtcpcb64 *otp)
{
- otp->t_segq = (uint32_t)VM_KERNEL_ADDRPERM(tp->t_segq.lh_first);
- otp->t_dupacks = tp->t_dupacks;
+ otp->t_segq = (uint32_t)VM_KERNEL_ADDRPERM(tp->t_segq.lh_first);
+ otp->t_dupacks = tp->t_dupacks;
otp->t_timer[TCPT_REXMT_EXT] = tp->t_timer[TCPT_REXMT];
otp->t_timer[TCPT_PERSIST_EXT] = tp->t_timer[TCPT_PERSIST];
otp->t_timer[TCPT_KEEP_EXT] = tp->t_timer[TCPT_KEEP];
otp->t_timer[TCPT_2MSL_EXT] = tp->t_timer[TCPT_2MSL];
- otp->t_state = tp->t_state;
- otp->t_flags = tp->t_flags;
- otp->t_force = (tp->t_flagsext & TF_FORCE) ? 1 : 0;
- 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 = 0;
+ otp->t_state = tp->t_state;
+ otp->t_flags = tp->t_flags;
+ otp->t_force = (tp->t_flagsext & TF_FORCE) ? 1 : 0;
+ 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 = 0;
+ otp->cc_recv = 0;
+ 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 = 0;
}
tcp_pcblist64 SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp, arg1, arg2)
- int error, i = 0, n;
- struct inpcb *inp, **inp_list;
- struct tcpcb *tp;
- inp_gen_t gencnt;
- struct xinpgen xig;
-
- /*
- * 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.ipi_lock);
- 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.ipi_lock);
- return 0;
- }
-
- if (req->newptr != USER_ADDR_NULL) {
- lck_rw_done(tcbinfo.ipi_lock);
- 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.ipi_lock);
- return error;
- }
- /*
- * We are done if there is no pcb
- */
- if (n == 0) {
- lck_rw_done(tcbinfo.ipi_lock);
- return 0;
- }
-
- inp_list = _MALLOC(n * sizeof *inp_list, M_TEMP, M_WAITOK);
- if (inp_list == 0) {
- lck_rw_done(tcbinfo.ipi_lock);
- return ENOMEM;
- }
+ int error, i = 0, n;
+ struct inpcb **inp_list;
+ inp_gen_t gencnt;
+ struct xinpgen xig;
- LIST_FOREACH(inp, tcbinfo.ipi_listhead, inp_list) {
- if (inp->inp_gencnt <= gencnt &&
- inp->inp_state != INPCB_STATE_DEAD)
- inp_list[i++] = inp;
- if (i >= n) break;
- }
+ /*
+ * 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.ipi_lock);
+ 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.ipi_lock);
+ return (0);
+ }
- TAILQ_FOREACH(tp, &tcp_tw_tailq, t_twentry) {
- inp = tp->t_inpcb;
- if (inp->inp_gencnt <= gencnt &&
- inp->inp_state != INPCB_STATE_DEAD)
- inp_list[i++] = inp;
- if (i >= n) break;
- }
-
- 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 = (uint64_t)VM_KERNEL_ADDRPERM(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) {
+ if (req->newptr != USER_ADDR_NULL) {
+ lck_rw_done(tcbinfo.ipi_lock);
+ 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.ipi_lock);
+ return (error);
+ }
+ /*
+ * We are done if there is no pcb
+ */
+ if (n == 0) {
+ lck_rw_done(tcbinfo.ipi_lock);
+ return (0);
+ }
+
+ inp_list = _MALLOC(n * sizeof (*inp_list), M_TEMP, M_WAITOK);
+ if (inp_list == 0) {
+ lck_rw_done(tcbinfo.ipi_lock);
+ return (ENOMEM);
+ }
+
+ n = get_tcp_inp_list(inp_list, n, gencnt);
+
+ error = 0;
+ for (i = 0; i < n; i++) {
+ struct xtcpcb64 xt;
+ struct inpcb *inp;
+
+ inp = inp_list[i];
+
+ if (in_pcb_checkstate(inp, WNT_ACQUIRE, 0) == WNT_STOPUSING)
+ continue;
+ tcp_lock(inp->inp_socket, 1, NULL);
+ if (in_pcb_checkstate(inp, WNT_RELEASE, 1) == WNT_STOPUSING) {
+ tcp_unlock(inp->inp_socket, 1, NULL);
+ continue;
+ }
+ if (inp->inp_gencnt > gencnt) {
+ tcp_unlock(inp->inp_socket, 1, NULL);
+ continue;
+ }
+
+ bzero(&xt, sizeof(xt));
+ xt.xt_len = sizeof(xt);
+ inpcb_to_xinpcb64(inp, &xt.xt_inpcb);
+ xt.xt_inpcb.inp_ppcb =
+ (uint64_t)VM_KERNEL_ADDRPERM(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);
+
+ tcp_unlock(inp->inp_socket, 1, NULL);
+
+ 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
* might be necessary to retry.
*/
bzero(&xig, sizeof(xig));
- xig.xig_len = 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.ipi_lock);
- return error;
+ error = SYSCTL_OUT(req, &xig, sizeof(xig));
+ }
+ FREE(inp_list, M_TEMP);
+ lck_rw_done(tcbinfo.ipi_lock);
+ return (error);
}
SYSCTL_PROC(_net_inet_tcp, OID_AUTO, pcblist64,
CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0,
- tcp_pcblist64, "S,xtcpcb64", "List of active TCP connections");
+ tcp_pcblist64, "S,xtcpcb64", "List of active TCP connections");
static int
{
#pragma unused(oidp, arg1, arg2)
int error = 0;
-
+
error = get_pcblist_n(IPPROTO_TCP, req, &tcbinfo);
-
- return error;
+
+ return (error);
}
SYSCTL_PROC(_net_inet_tcp, OID_AUTO, pcblist_n,
CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0,
- tcp_pcblist_n, "S,xtcpcb_n", "List of active TCP connections");
+ tcp_pcblist_n, "S,xtcpcb_n", "List of active TCP connections");
__private_extern__ void
tcp_get_ports_used(uint32_t ifindex, int protocol, uint32_t flags,
bitstr_t *bitfield)
{
- inpcb_get_ports_used(ifindex, protocol, flags,
+ inpcb_get_ports_used(ifindex, protocol, flags,
bitfield, &tcbinfo);
}
__private_extern__ uint32_t
tcp_count_opportunistic(unsigned int ifindex, u_int32_t flags)
{
- return inpcb_count_opportunistic(ifindex, &tcbinfo, flags);
+ return (inpcb_count_opportunistic(ifindex, &tcbinfo, flags));
}
__private_extern__ uint32_t
tcp_find_anypcb_byaddr(struct ifaddr *ifa)
{
- return inpcb_find_anypcb_byaddr(ifa, &tcbinfo);
+ return (inpcb_find_anypcb_byaddr(ifa, &tcbinfo));
+}
+
+static void
+tcp_handle_msgsize(struct ip *ip, struct inpcb *inp)
+{
+ struct rtentry *rt = NULL;
+ u_short ifscope = IFSCOPE_NONE;
+ int mtu;
+ struct sockaddr_in icmpsrc = {
+ sizeof (struct sockaddr_in),
+ AF_INET, 0, { 0 },
+ { 0, 0, 0, 0, 0, 0, 0, 0 } };
+ struct icmp *icp = NULL;
+
+ icp = (struct icmp *)(void *)
+ ((caddr_t)ip - offsetof(struct icmp, icmp_ip));
+
+ icmpsrc.sin_addr = icp->icmp_ip.ip_dst;
+
+ /*
+ * 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.
+ */
+ if (ROUTE_UNUSABLE(&(inp->inp_route)) == false)
+ rt = inp->inp_route.ro_rt;
+
+ /*
+ * icmp6_mtudisc_update scopes the routing lookup
+ * to the incoming interface (delivered from mbuf
+ * packet header.
+ * That is mostly ok but for asymmetric networks
+ * that may be an issue.
+ * Frag needed OR Packet too big really communicates
+ * MTU for the out data path.
+ * Take the interface scope from cached route or
+ * the last outgoing interface from inp
+ */
+ if (rt != NULL)
+ ifscope = (rt->rt_ifp != NULL) ?
+ rt->rt_ifp->if_index : IFSCOPE_NONE;
+ else
+ ifscope = (inp->inp_last_outifp != NULL) ?
+ inp->inp_last_outifp->if_index : IFSCOPE_NONE;
+
+ if ((rt == NULL) ||
+ !(rt->rt_flags & RTF_HOST) ||
+ (rt->rt_flags & (RTF_CLONING | RTF_PRCLONING))) {
+ rt = rtalloc1_scoped((struct sockaddr *)&icmpsrc, 0,
+ RTF_CLONING | RTF_PRCLONING, ifscope);
+ } else if (rt) {
+ RT_LOCK(rt);
+ rtref(rt);
+ RT_UNLOCK(rt);
+ }
+
+ if (rt != NULL) {
+ RT_LOCK(rt);
+ if ((rt->rt_flags & RTF_HOST) &&
+ !(rt->rt_rmx.rmx_locks & RTV_MTU)) {
+ mtu = ntohs(icp->icmp_nextmtu);
+ /*
+ * XXX Stock BSD has changed the following
+ * to compare with icp->icmp_ip.ip_len
+ * to converge faster when sent packet
+ * < route's MTU. We may want to adopt
+ * that change.
+ */
+ if (mtu == 0)
+ 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_locks |= RTV_MTU;
+ } else if (rt->rt_rmx.rmx_mtu > mtu) {
+ rt->rt_rmx.rmx_mtu = mtu;
+ }
+ }
+ RT_UNLOCK(rt);
+ rtfree(rt);
+ }
}
void
-tcp_ctlinput(cmd, sa, vip)
- int cmd;
- struct sockaddr *sa;
- void *vip;
+tcp_ctlinput(int cmd, struct sockaddr *sa, void *vip)
{
tcp_seq icmp_tcp_seq;
struct ip *ip = vip;
} else if (cmd == PRC_HOSTDEAD)
ip = 0;
/* Source quench is deprecated */
- else if (cmd == PRC_QUENCH)
+ else if (cmd == PRC_QUENCH)
return;
else if (inetctlerrmap[cmd] == 0)
return;
icp = (struct icmp *)(void *)
((caddr_t)ip - offsetof(struct icmp, icmp_ip));
- bcopy(((caddr_t)ip + (IP_VHL_HL(ip->ip_vhl) << 2)),
- &th, sizeof (th));
+ /*
+ * Only the first 8 bytes of TCP header will be returned.
+ */
+ bzero(&th, sizeof(th));
+ bcopy(((caddr_t)ip + (IP_VHL_HL(ip->ip_vhl) << 2)), &th, 8);
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_lock(inp->inp_socket, 1, 0);
- if (in_pcb_checkstate(inp, WNT_RELEASE, 1) == WNT_STOPUSING) {
+ if (in_pcb_checkstate(inp, WNT_RELEASE, 1) ==
+ WNT_STOPUSING) {
tcp_unlock(inp->inp_socket, 1, 0);
return;
}
tp = intotcpcb(inp);
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);
- }
- }
+ if (cmd == PRC_MSGSIZE)
+ tcp_handle_msgsize(ip, inp);
(*notify)(inp, inetctlerrmap[cmd]);
}
#if INET6
void
-tcp6_ctlinput(cmd, sa, d)
- int cmd;
- struct sockaddr *sa;
- void *d;
+tcp6_ctlinput(int cmd, struct sockaddr *sa, void *d)
{
struct tcphdr th;
void (*notify)(struct inpcb *, int) = tcp_notify;
else if (!PRC_IS_REDIRECT(cmd) && (inet6ctlerrmap[cmd] == 0))
return;
/* Source quench is deprecated */
- else if (cmd == PRC_QUENCH)
+ else if (cmd == PRC_QUENCH)
return;
/* if the parameter is from icmp6, decode it. */
* 1. In SYN-ACK packets.
* 2. In SYN packets.
*
- * The ISNs in SYN-ACK packets have no monotonicity requirement,
+ * The ISNs in SYN-ACK packets have no monotonicity requirement,
* and should be as unpredictable as possible to avoid the possibility
* of spoofing and/or connection hijacking. To satisfy this
* requirement, SYN-ACK ISNs are generated via the arc4random()
*
*/
-#define ISN_BYTES_PER_SECOND 1048576
+#define ISN_BYTES_PER_SECOND 1048576
tcp_seq
-tcp_new_isn(tp)
- struct tcpcb *tp;
+tcp_new_isn(struct tcpcb *tp)
{
u_int32_t md5_buffer[4];
tcp_seq new_isn;
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))
- && tcp_strict_rfc1948 == 0)
+ if (((tp->t_state == TCPS_LISTEN) || (tp->t_state == TCPS_TIME_WAIT)) &&
+ tcp_strict_rfc1948 == 0)
#ifdef __APPLE__
- return RandomULong();
+ return (RandomULong());
#else
- return arc4random();
+ return (arc4random());
#endif
getmicrotime(&timenow);
/* Seed if this is the first use, reseed if requested. */
if ((isn_last_reseed == 0) ||
((tcp_strict_rfc1948 == 0) && (tcp_isn_reseed_interval > 0) &&
- (((u_int)isn_last_reseed + (u_int)tcp_isn_reseed_interval*hz)
+ (((u_int)isn_last_reseed + (u_int)tcp_isn_reseed_interval*hz)
< (u_int)timenow.tv_sec))) {
#ifdef __APPLE__
read_random(&isn_secret, sizeof(isn_secret));
#endif
isn_last_reseed = timenow.tv_sec;
}
-
+
/* Compute the md5 hash and return the ISN. */
MD5Init(&isn_ctx);
- MD5Update(&isn_ctx, (u_char *) &tp->t_inpcb->inp_fport, sizeof(u_short));
- MD5Update(&isn_ctx, (u_char *) &tp->t_inpcb->inp_lport, sizeof(u_short));
+ MD5Update(&isn_ctx, (u_char *) &tp->t_inpcb->inp_fport,
+ sizeof(u_short));
+ MD5Update(&isn_ctx, (u_char *) &tp->t_inpcb->inp_lport,
+ sizeof(u_short));
#if INET6
if ((tp->t_inpcb->inp_vflag & INP_IPV6) != 0) {
MD5Update(&isn_ctx, (u_char *) &tp->t_inpcb->in6p_faddr,
- sizeof(struct in6_addr));
+ sizeof(struct in6_addr));
MD5Update(&isn_ctx, (u_char *) &tp->t_inpcb->in6p_laddr,
- sizeof(struct in6_addr));
+ sizeof(struct in6_addr));
} else
#endif
{
MD5Update(&isn_ctx, (u_char *) &tp->t_inpcb->inp_faddr,
- sizeof(struct in_addr));
+ sizeof(struct in_addr));
MD5Update(&isn_ctx, (u_char *) &tp->t_inpcb->inp_laddr,
- sizeof(struct in_addr));
+ sizeof(struct in_addr));
}
MD5Update(&isn_ctx, (u_char *) &isn_secret, sizeof(isn_secret));
MD5Final((u_char *) &md5_buffer, &isn_ctx);
new_isn = (tcp_seq) md5_buffer[0];
new_isn += timenow.tv_sec * (ISN_BYTES_PER_SECOND / hz);
- return new_isn;
+ return (new_isn);
}
* is controlled by the icmp_may_rst sysctl.
*/
void
-tcp_drop_syn_sent(inp, errno)
- struct inpcb *inp;
- int errno;
+tcp_drop_syn_sent(struct inpcb *inp, int errno)
{
struct tcpcb *tp = intotcpcb(inp);
int offered;
int mss;
u_int32_t mtu;
+ u_int32_t protoHdrOverhead = sizeof (struct tcpiphdr);
#if INET6
int isipv6 = (tp->t_inpcb->inp_vflag & INP_IPV6) != 0;
+
+ if (isipv6)
+ protoHdrOverhead = sizeof(struct ip6_hdr) +
+ sizeof(struct tcphdr);
#endif /* INET6 */
if (tp) {
rt = tcp_rtlookup6(inp, IFSCOPE_NONE);
else
#endif /* INET6 */
- rt = tcp_rtlookup(inp, IFSCOPE_NONE);
+ rt = tcp_rtlookup(inp, IFSCOPE_NONE);
if (!rt || !rt->rt_rmx.rmx_mtu) {
tp->t_maxopd = tp->t_maxseg =
#if INET6
// Adjust MTU if necessary.
mtu = necp_socket_get_effective_mtu(inp, mtu);
#endif /* NECP */
-
- mss = mtu -
-#if INET6
- (isipv6 ?
- sizeof(struct ip6_hdr) + sizeof(struct tcphdr) :
-#endif /* INET6 */
- sizeof(struct tcpiphdr)
-#if INET6
- )
-#endif /* INET6 */
- ;
+ mss = mtu - protoHdrOverhead;
if (offered)
mss = min(mss, offered);
tp->t_maxseg = mss;
/*
- * Reset the slow-start flight size as it may depends on the new 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);
* hold the rtentry lock; the caller is responsible for unlocking.
*/
struct rtentry *
-tcp_rtlookup(inp, input_ifscope)
- struct inpcb *inp;
- unsigned int input_ifscope;
+tcp_rtlookup(struct inpcb *inp, unsigned int input_ifscope)
{
struct route *ro;
struct rtentry *rt;
* disabled)
*/
- tp = intotcpcb(inp);
+ tp = intotcpcb(inp);
- if (!path_mtu_discovery || ((rt != NULL) &&
- (!(rt->rt_flags & RTF_UP) || (rt->rt_rmx.rmx_locks & RTV_MTU))))
+ 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);
soif2kcl(inp->inp_socket,
(rt->rt_ifp->if_eflags & IFEF_2KCL));
+ tcp_set_ecn(tp, rt->rt_ifp);
+ if (inp->inp_last_outifp == NULL)
+ inp->inp_last_outifp = rt->rt_ifp;
}
/* Note if the peer is local */
in_localaddr(inp->inp_faddr))) {
tp->t_flags |= TF_LOCAL;
}
-
+
/*
* Caller needs to call RT_UNLOCK(rt).
*/
- return rt;
+ return (rt);
}
#if INET6
struct rtentry *
-tcp_rtlookup6(inp, input_ifscope)
- struct inpcb *inp;
- unsigned int input_ifscope;
+tcp_rtlookup6(struct inpcb *inp, unsigned int input_ifscope)
{
struct route_in6 *ro6;
struct rtentry *rt;
*/
- tp = intotcpcb(inp);
+ tp = intotcpcb(inp);
/*
* Update MTU discovery determination. Don't do it if:
* disabled)
*/
- if (!path_mtu_discovery || ((rt != NULL) &&
- (!(rt->rt_flags & RTF_UP) || (rt->rt_rmx.rmx_locks & RTV_MTU))))
+ 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);
soif2kcl(inp->inp_socket,
(rt->rt_ifp->if_eflags & IFEF_2KCL));
+ tcp_set_ecn(tp, rt->rt_ifp);
+ if (inp->inp_last_outifp == NULL)
+ inp->inp_last_outifp = rt->rt_ifp;
}
/* Note if the peer is local */
/*
* Caller needs to call RT_UNLOCK(rt).
*/
- return rt;
+ return (rt);
}
#endif /* INET6 */
#if IPSEC
/* compute ESP/AH header size for TCP, including outer IP header. */
size_t
-ipsec_hdrsiz_tcp(tp)
- struct tcpcb *tp;
+ipsec_hdrsiz_tcp(struct tcpcb *tp)
{
struct inpcb *inp;
struct mbuf *m;
struct tcphdr *th;
if ((tp == NULL) || ((inp = tp->t_inpcb) == NULL))
- return 0;
+ return (0);
MGETHDR(m, M_DONTWAIT, MT_DATA); /* MAC-OK */
if (!m)
- return 0;
+ return (0);
#if INET6
if ((inp->inp_vflag & INP_IPV6) != 0) {
hdrsiz = ipsec6_hdrsiz(m, IPSEC_DIR_OUTBOUND, inp);
} else
#endif /* INET6 */
- {
- ip = mtod(m, struct ip *);
- th = (struct tcphdr *)(ip + 1);
- m->m_pkthdr.len = m->m_len = sizeof(struct tcpiphdr);
- tcp_fillheaders(tp, ip, th);
- hdrsiz = ipsec4_hdrsiz(m, IPSEC_DIR_OUTBOUND, inp);
- }
+ {
+ ip = mtod(m, struct ip *);
+ th = (struct tcphdr *)(ip + 1);
+ m->m_pkthdr.len = m->m_len = sizeof(struct tcpiphdr);
+ tcp_fillheaders(tp, ip, th);
+ hdrsiz = ipsec4_hdrsiz(m, IPSEC_DIR_OUTBOUND, inp);
+ }
m_free(m);
- return hdrsiz;
+ return (hdrsiz);
}
-#endif /*IPSEC*/
+#endif /* IPSEC */
/*
* Return a pointer to the cached information about the remote host.
* the route metrics.
*/
struct rmxp_tao *
-tcp_gettaocache(inp)
- struct inpcb *inp;
+tcp_gettaocache(struct inpcb *inp)
{
struct rtentry *rt;
struct rmxp_tao *taop;
/* Route locked during lookup above */
if (rt != NULL)
RT_UNLOCK(rt);
- return NULL;
+ return (NULL);
}
-
+
taop = rmx_taop(rt->rt_rmx);
/* Route locked during lookup above */
RT_UNLOCK(rt);
* nothing in the cache left over.
*/
static void
-tcp_cleartaocache()
+tcp_cleartaocache(void)
{
}
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",
+ 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=%p so_pcb=%p lr=%p ref=%x lrh= %s\n",
- so, so->so_pcb, lr_saved, so->so_usecount, solockhistory_nr(so));
+ so, so->so_pcb, lr_saved, so->so_usecount,
+ solockhistory_nr(so));
/* NOTREACHED */
}
if (refcount)
so->so_usecount--;
if (so->so_usecount < 0) {
- panic("tcp_unlock: so=%p usecount=%x lrh= %s\n",
+ panic("tcp_unlock: so=%p usecount=%x lrh= %s\n",
so, so->so_usecount, solockhistory_nr(so));
/* NOTREACHED */
}
if (so->so_pcb == NULL) {
- panic("tcp_unlock: so=%p NO PCB usecount=%x lr=%p lrh= %s\n",
+ 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_t *
-tcp_getlock(
- struct socket *so,
- __unused 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=%p usecount=%x lrh= %s\n",
- so, so->so_usecount, solockhistory_nr(so));
- return(&inp->inpcb_mtx);
- }
- else {
- panic("tcp_getlock: so=%p NULL so_pcb %s\n",
+ 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=%p NULL so_pcb %s\n",
so, solockhistory_nr(so));
return (so->so_proto->pr_domain->dom_mtx);
}
}
-/*
+/*
* Determine if we can grow the recieve socket buffer to avoid sending
- * a zero window update to the peer. We allow even socket buffers that
+ * a zero window update to the peer. We allow even socket buffers that
* have fixed size (set by the application) to grow if the resource
* constraints are met. They will also be trimmed after the application
* reads data.
u_int32_t rcvbuf = sb->sb_hiwat;
struct socket *so = tp->t_inpcb->inp_socket;
+ if (tcp_recv_bg == 1 || IS_TCP_RECV_BG(so))
+ return;
/*
* If message delivery is enabled, do not count
* unordered bytes in receive buffer towards hiwat
int32_t
tcp_sbspace(struct tcpcb *tp)
{
- struct sockbuf *sb = &tp->t_inpcb->inp_socket->so_rcv;
- u_int32_t rcvbuf = sb->sb_hiwat;
- int32_t space;
struct socket *so = tp->t_inpcb->inp_socket;
+ struct sockbuf *sb = &so->so_rcv;
+ u_int32_t rcvbuf;
+ int32_t space;
int32_t pending = 0;
+ tcp_sbrcv_grow_rwin(tp, sb);
+
+ /* hiwat might have changed */
+ rcvbuf = sb->sb_hiwat;
+
/*
* If message delivery is enabled, do not count
* unordered bytes in receive buffer towards hiwat mark.
if (so->so_flags & SOF_ENABLE_MSGS)
rcvbuf = rcvbuf - so->so_msg_state->msg_uno_bytes;
- tcp_sbrcv_grow_rwin(tp, sb);
-
space = ((int32_t) imin((rcvbuf - sb->sb_cc),
(sb->sb_mbmax - sb->sb_mbcnt)));
- if (space < 0)
+ if (space < 0)
space = 0;
#if CONTENT_FILTER
else
space -= pending;
- /* Avoid increasing window size if the current window
+ /*
+ * 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;
+ if (space < tp->t_maxseg)
+ return (space);
- /* Clip window size for slower link */
+ /* Clip window size for slower link */
- if (((tp->t_flags & TF_SLOWLINK) != 0) && slowlink_wsize > 0 )
- return imin(space, slowlink_wsize);
+ if (((tp->t_flags & TF_SLOWLINK) != 0) && slowlink_wsize > 0)
+ return (imin(space, slowlink_wsize));
- return space;
+ return (space);
}
/*
* Checks TCP Segment Offloading capability for a given connection
if (isipv6) {
if (ifp && (ifp->if_hwassist & IFNET_TSO_IPV6)) {
tp->t_flags |= TF_TSO;
- if (ifp->if_tso_v6_mtu != 0)
+ 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
+ } else
#endif /* INET6 */
{
if (ifp && (ifp->if_hwassist & IFNET_TSO_IPV4)) {
tp->t_flags |= TF_TSO;
- if (ifp->if_tso_v4_mtu != 0)
+ 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;
}
}
-#define TIMEVAL_TO_TCPHZ(_tv_) ((_tv_).tv_sec * TCP_RETRANSHZ + (_tv_).tv_usec / TCP_RETRANSHZ_TO_USEC)
+#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
+/*
+ * 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
+ * 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()
+calculate_tcp_clock(void)
{
struct timeval tv = tcp_uptime;
struct timeval interval = {0, TCP_RETRANSHZ_TO_USEC};
tcp_now += incr;
}
- lck_spin_unlock(tcp_uptime_lock);
- }
- return;
+ lck_spin_unlock(tcp_uptime_lock);
+ }
}
-/* Compute receive window scaling that we are going to request
- * for this connection based on sb_hiwat. Try to leave some
- * room to potentially increase the window size upto a maximum
+/*
+ * Compute receive window scaling that we are going to request
+ * for this connection based on sb_hiwat. Try to leave some
+ * room to potentially increase the window size upto a maximum
* defined by the constant tcp_autorcvbuf_max.
*/
void
-tcp_set_max_rwinscale(struct tcpcb *tp, struct socket *so) {
+tcp_set_max_rwinscale(struct tcpcb *tp, struct socket *so,
+ u_int32_t rcvbuf_max)
+{
u_int32_t maxsockbufsize;
if (!tcp_do_rfc1323) {
tp->request_r_scale = 0;
tp->request_r_scale = max(tcp_win_scale, tp->request_r_scale);
maxsockbufsize = ((so->so_rcv.sb_flags & SB_USRSIZE) != 0) ?
- so->so_rcv.sb_hiwat : tcp_autorcvbuf_max;
+ so->so_rcv.sb_hiwat : rcvbuf_max;
while (tp->request_r_scale < TCP_MAX_WINSHIFT &&
(TCP_MAXWIN << tp->request_r_scale) < maxsockbufsize)
tp = intotcpcb(inp);
}
- notsent = so->so_snd.sb_cc -
+ notsent = so->so_snd.sb_cc -
(tp->snd_nxt - tp->snd_una);
- /* When we send a FIN or SYN, not_sent can be negative.
- * In that case also we need to send a write event to the
+ /*
+ * When we send a FIN or SYN, not_sent can be negative.
+ * In that case also we need to send a write event to the
* process if it is waiting. In the FIN case, it will
* get an error from send because cantsendmore will be set.
*/
if (notsent <= tp->t_notsent_lowat) {
- return(1);
+ return (1);
}
- /* When Nagle's algorithm is not disabled, it is better
+ /*
+ * When Nagle's algorithm is not disabled, it is better
* to wakeup the client until there is atleast one
* maxseg of data to write.
*/
- if ((tp->t_flags & TF_NODELAY) == 0 &&
+ if ((tp->t_flags & TF_NODELAY) == 0 &&
notsent > 0 && notsent < tp->t_maxseg) {
- return(1);
+ return (1);
}
- return(0);
+ return (0);
}
void
-tcp_rxtseg_insert(struct tcpcb *tp, tcp_seq start, tcp_seq end) {
+tcp_rxtseg_insert(struct tcpcb *tp, tcp_seq start, tcp_seq end)
+{
struct tcp_rxt_seg *rxseg = NULL, *prev = NULL, *next = NULL;
u_int32_t rxcount = 0;
} else {
SLIST_INSERT_HEAD(&tp->t_rxt_segments, rxseg, rx_link);
}
- return;
}
struct tcp_rxt_seg *
SLIST_FOREACH(rxseg, &tp->t_rxt_segments, rx_link) {
if (rxseg->rx_count == 1 &&
- SLIST_NEXT(rxseg,rx_link) == NULL &&
+ SLIST_NEXT(rxseg, rx_link) == NULL &&
(rxseg->rx_flags & TCP_RXT_DSACK_FOR_TLP)) {
dsack_for_tlp = TRUE;
break;
}
u_int32_t
-tcp_rxtseg_total_size(struct tcpcb *tp) {
+tcp_rxtseg_total_size(struct tcpcb *tp)
+{
struct tcp_rxt_seg *rxseg;
u_int32_t total_size = 0;
}
if (tp->t_rtimo_probes >= TCP_CONNECTIVITY_PROBES_MAX)
connstatus->read_probe_failed = 1;
- if (tp->t_inpcb != NULL && tp->t_inpcb->inp_last_outifp != NULL
- && (tp->t_inpcb->inp_last_outifp->if_eflags & IFEF_PROBE_CONNECTIVITY))
+ if (tp->t_inpcb != NULL && tp->t_inpcb->inp_last_outifp != NULL &&
+ (tp->t_inpcb->inp_last_outifp->if_eflags & IFEF_PROBE_CONNECTIVITY))
connstatus->probe_activated = 1;
- return;
}
boolean_t
tfo_enabled(const struct tcpcb *tp)
{
- return !!(tp->t_flagsext & TF_FASTOPEN);
+ return ((tp->t_flagsext & TF_FASTOPEN)? TRUE : FALSE);
}
void
tp->t_flagsext &= ~TF_FASTOPEN;
}
+static struct mbuf *
+tcp_make_keepalive_frame(struct tcpcb *tp, struct ifnet *ifp,
+ boolean_t is_probe)
+{
+ struct inpcb *inp = tp->t_inpcb;
+ struct tcphdr *th;
+ u_int8_t *data;
+ int win = 0;
+ struct mbuf *m;
+
+ /*
+ * The code assumes the IP + TCP headers fit in an mbuf packet header
+ */
+ _CASSERT(sizeof(struct ip) + sizeof(struct tcphdr) <= _MHLEN);
+ _CASSERT(sizeof(struct ip6_hdr) + sizeof(struct tcphdr) <= _MHLEN);
+
+ MGETHDR(m, M_WAIT, MT_HEADER);
+ if (m == NULL) {
+ return (NULL);
+ }
+ m->m_pkthdr.pkt_proto = IPPROTO_TCP;
+
+ data = mbuf_datastart(m);
+
+ if (inp->inp_vflag & INP_IPV4) {
+ bzero(data, sizeof(struct ip) + sizeof(struct tcphdr));
+ th = (struct tcphdr *)(void *) (data + sizeof(struct ip));
+ m->m_len = sizeof(struct ip) + sizeof(struct tcphdr);
+ m->m_pkthdr.len = m->m_len;
+ } else {
+ VERIFY(inp->inp_vflag & INP_IPV6);
+
+ bzero(data, sizeof(struct ip6_hdr)
+ + sizeof(struct tcphdr));
+ th = (struct tcphdr *)(void *)(data + sizeof(struct ip6_hdr));
+ m->m_len = sizeof(struct ip6_hdr) +
+ sizeof(struct tcphdr);
+ m->m_pkthdr.len = m->m_len;
+ }
+
+ tcp_fillheaders(tp, data, th);
+
+ if (inp->inp_vflag & INP_IPV4) {
+ struct ip *ip;
+
+ ip = (__typeof__(ip))(void *)data;
+
+ ip->ip_id = ip_randomid();
+ ip->ip_len = htons(sizeof(struct ip) + sizeof(struct tcphdr));
+ ip->ip_ttl = inp->inp_ip_ttl;
+ ip->ip_tos |= (inp->inp_ip_tos & ~IPTOS_ECN_MASK);
+ ip->ip_sum = in_cksum_hdr(ip);
+ } else {
+ struct ip6_hdr *ip6;
+
+ ip6 = (__typeof__(ip6))(void *)data;
+
+ ip6->ip6_plen = htons(sizeof(struct tcphdr));
+ ip6->ip6_hlim = in6_selecthlim(inp, ifp);
+ ip6->ip6_flow = ip6->ip6_flow & ~IPV6_FLOW_ECN_MASK;
+
+ if (IN6_IS_SCOPE_EMBED(&ip6->ip6_src))
+ ip6->ip6_src.s6_addr16[1] = 0;
+ if (IN6_IS_SCOPE_EMBED(&ip6->ip6_dst))
+ ip6->ip6_dst.s6_addr16[1] = 0;
+ }
+ th->th_flags = TH_ACK;
+
+ win = tcp_sbspace(tp);
+ if (win > ((int32_t)TCP_MAXWIN << tp->rcv_scale))
+ win = (int32_t)TCP_MAXWIN << tp->rcv_scale;
+ th->th_win = htons((u_short) (win >> tp->rcv_scale));
+
+ if (is_probe) {
+ th->th_seq = htonl(tp->snd_una - 1);
+ } else {
+ th->th_seq = htonl(tp->snd_una);
+ }
+ th->th_ack = htonl(tp->rcv_nxt);
+
+ /* Force recompute TCP checksum to be the final value */
+ th->th_sum = 0;
+ if (inp->inp_vflag & INP_IPV4) {
+ th->th_sum = inet_cksum(m, IPPROTO_TCP,
+ sizeof(struct ip), sizeof(struct tcphdr));
+ } else {
+ th->th_sum = inet6_cksum(m, IPPROTO_TCP,
+ sizeof(struct ip6_hdr), sizeof(struct tcphdr));
+ }
+
+ return (m);
+}
+
+void
+tcp_fill_keepalive_offload_frames(ifnet_t ifp,
+ struct ifnet_keepalive_offload_frame *frames_array,
+ u_int32_t frames_array_count, size_t frame_data_offset,
+ u_int32_t *used_frames_count)
+{
+ struct inpcb *inp;
+ inp_gen_t gencnt;
+ u_int32_t frame_index = *used_frames_count;
+
+ if (ifp == NULL || frames_array == NULL ||
+ frames_array_count == 0 ||
+ frame_index >= frames_array_count ||
+ frame_data_offset >= IFNET_KEEPALIVE_OFFLOAD_FRAME_DATA_SIZE)
+ return;
+
+ /*
+ * This function is called outside the regular TCP processing
+ * so we need to update the TCP clock.
+ */
+ calculate_tcp_clock();
+
+ lck_rw_lock_shared(tcbinfo.ipi_lock);
+ gencnt = tcbinfo.ipi_gencnt;
+ LIST_FOREACH(inp, tcbinfo.ipi_listhead, inp_list) {
+ struct socket *so;
+ struct ifnet_keepalive_offload_frame *frame;
+ struct mbuf *m = NULL;
+ struct tcpcb *tp = intotcpcb(inp);
+
+ if (frame_index >= frames_array_count)
+ break;
+
+ if (inp->inp_gencnt > gencnt ||
+ inp->inp_state == INPCB_STATE_DEAD)
+ continue;
+
+ if ((so = inp->inp_socket) == NULL ||
+ (so->so_state & SS_DEFUNCT))
+ continue;
+ /*
+ * check for keepalive offload flag without socket
+ * lock to avoid a deadlock
+ */
+ if (!(inp->inp_flags2 & INP2_KEEPALIVE_OFFLOAD)) {
+ continue;
+ }
+
+ if (!(inp->inp_vflag & (INP_IPV4 | INP_IPV6))) {
+ continue;
+ }
+ if (inp->inp_ppcb == NULL ||
+ in_pcb_checkstate(inp, WNT_ACQUIRE, 0) == WNT_STOPUSING)
+ continue;
+ tcp_lock(so, 1, 0);
+ /* Release the want count */
+ if (inp->inp_ppcb == NULL ||
+ (in_pcb_checkstate(inp, WNT_RELEASE, 1) == WNT_STOPUSING)) {
+ tcp_unlock(so, 1, 0);
+ continue;
+ }
+ if ((inp->inp_vflag & INP_IPV4) &&
+ (inp->inp_laddr.s_addr == INADDR_ANY ||
+ inp->inp_faddr.s_addr == INADDR_ANY)) {
+ tcp_unlock(so, 1, 0);
+ continue;
+ }
+ if ((inp->inp_vflag & INP_IPV6) &&
+ (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) ||
+ IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))) {
+ tcp_unlock(so, 1, 0);
+ continue;
+ }
+ if (inp->inp_lport == 0 || inp->inp_fport == 0) {
+ tcp_unlock(so, 1, 0);
+ continue;
+ }
+ if (inp->inp_last_outifp == NULL ||
+ inp->inp_last_outifp->if_index != ifp->if_index) {
+ tcp_unlock(so, 1, 0);
+ continue;
+ }
+ if ((inp->inp_vflag & INP_IPV4) && frame_data_offset +
+ sizeof(struct ip) + sizeof(struct tcphdr) >
+ IFNET_KEEPALIVE_OFFLOAD_FRAME_DATA_SIZE) {
+ tcp_unlock(so, 1, 0);
+ continue;
+ } else if (!(inp->inp_vflag & INP_IPV4) && frame_data_offset +
+ sizeof(struct ip6_hdr) + sizeof(struct tcphdr) >
+ IFNET_KEEPALIVE_OFFLOAD_FRAME_DATA_SIZE) {
+ tcp_unlock(so, 1, 0);
+ continue;
+ }
+ /*
+ * There is no point in waking up the device for connections
+ * that are not established. Long lived connection are meant
+ * for processes that will sent and receive data
+ */
+ if (tp->t_state != TCPS_ESTABLISHED) {
+ tcp_unlock(so, 1, 0);
+ continue;
+ }
+ /*
+ * This inp has all the information that is needed to
+ * generate an offload frame.
+ */
+ frame = &frames_array[frame_index];
+ frame->type = IFNET_KEEPALIVE_OFFLOAD_FRAME_TCP;
+ frame->ether_type = (inp->inp_vflag & INP_IPV4) ?
+ IFNET_KEEPALIVE_OFFLOAD_FRAME_ETHERTYPE_IPV4 :
+ IFNET_KEEPALIVE_OFFLOAD_FRAME_ETHERTYPE_IPV6;
+ frame->interval = tp->t_keepidle > 0 ? tp->t_keepidle :
+ tcp_keepidle;
+ frame->keep_cnt = TCP_CONN_KEEPCNT(tp);
+ frame->keep_retry = TCP_CONN_KEEPINTVL(tp);
+ frame->local_port = ntohs(inp->inp_lport);
+ frame->remote_port = ntohs(inp->inp_fport);
+ frame->local_seq = tp->snd_nxt;
+ frame->remote_seq = tp->rcv_nxt;
+ if (inp->inp_vflag & INP_IPV4) {
+ frame->length = frame_data_offset +
+ sizeof(struct ip) + sizeof(struct tcphdr);
+ frame->reply_length = frame->length;
+
+ frame->addr_length = sizeof(struct in_addr);
+ bcopy(&inp->inp_laddr, frame->local_addr,
+ sizeof(struct in_addr));
+ bcopy(&inp->inp_faddr, frame->remote_addr,
+ sizeof(struct in_addr));
+ } else {
+ struct in6_addr *ip6;
+
+ frame->length = frame_data_offset +
+ sizeof(struct ip6_hdr) + sizeof(struct tcphdr);
+ frame->reply_length = frame->length;
+
+ frame->addr_length = sizeof(struct in6_addr);
+ ip6 = (struct in6_addr *)(void *)frame->local_addr;
+ bcopy(&inp->in6p_laddr, ip6, sizeof(struct in6_addr));
+ if (IN6_IS_SCOPE_EMBED(ip6))
+ ip6->s6_addr16[1] = 0;
+
+ ip6 = (struct in6_addr *)(void *)frame->remote_addr;
+ bcopy(&inp->in6p_faddr, ip6, sizeof(struct in6_addr));
+ if (IN6_IS_SCOPE_EMBED(ip6))
+ ip6->s6_addr16[1] = 0;
+ }
+
+ /*
+ * First the probe
+ */
+ m = tcp_make_keepalive_frame(tp, ifp, TRUE);
+ if (m == NULL) {
+ tcp_unlock(so, 1, 0);
+ continue;
+ }
+ bcopy(m->m_data, frame->data + frame_data_offset,
+ m->m_len);
+ m_freem(m);
+
+ /*
+ * Now the response packet to incoming probes
+ */
+ m = tcp_make_keepalive_frame(tp, ifp, FALSE);
+ if (m == NULL) {
+ tcp_unlock(so, 1, 0);
+ continue;
+ }
+ bcopy(m->m_data, frame->reply_data + frame_data_offset,
+ m->m_len);
+ m_freem(m);
+
+ frame_index++;
+ tcp_unlock(so, 1, 0);
+ }
+ lck_rw_done(tcbinfo.ipi_lock);
+ *used_frames_count = frame_index;
+}
+
+errno_t
+tcp_notify_ack_id_valid(struct tcpcb *tp, struct socket *so,
+ u_int32_t notify_id)
+{
+ struct tcp_notify_ack_marker *elm;
+
+ if (so->so_snd.sb_cc == 0)
+ return (ENOBUFS);
+
+ SLIST_FOREACH(elm, &tp->t_notify_ack, notify_next) {
+ /* Duplicate id is not allowed */
+ if (elm->notify_id == notify_id)
+ return (EINVAL);
+ /* Duplicate position is not allowed */
+ if (elm->notify_snd_una == tp->snd_una + so->so_snd.sb_cc)
+ return (EINVAL);
+ }
+ return (0);
+}
+
+errno_t
+tcp_add_notify_ack_marker(struct tcpcb *tp, u_int32_t notify_id)
+{
+ struct tcp_notify_ack_marker *nm, *elm = NULL;
+ struct socket *so = tp->t_inpcb->inp_socket;
+
+ MALLOC(nm, struct tcp_notify_ack_marker *, sizeof (*nm),
+ M_TEMP, M_WAIT | M_ZERO);
+ if (nm == NULL)
+ return (ENOMEM);
+ nm->notify_id = notify_id;
+ nm->notify_snd_una = tp->snd_una + so->so_snd.sb_cc;
+
+ SLIST_FOREACH(elm, &tp->t_notify_ack, notify_next) {
+ if (SEQ_GT(nm->notify_snd_una, elm->notify_snd_una))
+ break;
+ }
+
+ if (elm == NULL) {
+ VERIFY(SLIST_EMPTY(&tp->t_notify_ack));
+ SLIST_INSERT_HEAD(&tp->t_notify_ack, nm, notify_next);
+ } else {
+ SLIST_INSERT_AFTER(elm, nm, notify_next);
+ }
+ tp->t_notify_ack_count++;
+ return (0);
+}
+
+void
+tcp_notify_ack_free(struct tcpcb *tp)
+{
+ struct tcp_notify_ack_marker *elm, *next;
+ if (SLIST_EMPTY(&tp->t_notify_ack))
+ return;
+
+ SLIST_FOREACH_SAFE(elm, &tp->t_notify_ack, notify_next, next) {
+ SLIST_REMOVE(&tp->t_notify_ack, elm, tcp_notify_ack_marker,
+ notify_next);
+ FREE(elm, M_TEMP);
+ }
+ SLIST_INIT(&tp->t_notify_ack);
+ tp->t_notify_ack_count = 0;
+}
+
+inline void
+tcp_notify_acknowledgement(struct tcpcb *tp, struct socket *so)
+{
+ struct tcp_notify_ack_marker *elm;
+
+ elm = SLIST_FIRST(&tp->t_notify_ack);
+ if (SEQ_GEQ(tp->snd_una, elm->notify_snd_una)) {
+ soevent(so, SO_FILT_HINT_LOCKED | SO_FILT_HINT_NOTIFY_ACK);
+ }
+}
+
+void
+tcp_get_notify_ack_count(struct tcpcb *tp,
+ struct tcp_notify_ack_complete *retid)
+{
+ struct tcp_notify_ack_marker *elm;
+ size_t complete = 0;
+
+ SLIST_FOREACH(elm, &tp->t_notify_ack, notify_next) {
+ if (SEQ_GEQ(tp->snd_una, elm->notify_snd_una))
+ complete++;
+ else
+ break;
+ }
+ retid->notify_pending = tp->t_notify_ack_count - complete;
+ retid->notify_complete_count = min(TCP_MAX_NOTIFY_ACK, complete);
+}
+
+void
+tcp_get_notify_ack_ids(struct tcpcb *tp,
+ struct tcp_notify_ack_complete *retid)
+{
+ size_t i = 0;
+ struct tcp_notify_ack_marker *elm, *next;
+
+ SLIST_FOREACH_SAFE(elm, &tp->t_notify_ack, notify_next, next) {
+ if (i >= retid->notify_complete_count)
+ break;
+ if (SEQ_GEQ(tp->snd_una, elm->notify_snd_una)) {
+ retid->notify_complete_id[i++] = elm->notify_id;
+ SLIST_REMOVE(&tp->t_notify_ack, elm,
+ tcp_notify_ack_marker, notify_next);
+ FREE(elm, M_TEMP);
+ tp->t_notify_ack_count--;
+ } else {
+ break;
+ }
+ }
+}
+
+bool
+tcp_notify_ack_active(struct socket *so)
+{
+ if ((SOCK_DOM(so) == PF_INET || SOCK_DOM(so) == PF_INET6) &&
+ SOCK_TYPE(so) == SOCK_STREAM) {
+ struct tcpcb *tp = intotcpcb(sotoinpcb(so));
+
+ if (!SLIST_EMPTY(&tp->t_notify_ack)) {
+ struct tcp_notify_ack_marker *elm;
+ elm = SLIST_FIRST(&tp->t_notify_ack);
+ if (SEQ_GEQ(tp->snd_una, elm->notify_snd_una))
+ return (true);
+ }
+ }
+ return (false);
+}
+
+inline int32_t
+inp_get_sndbytes_allunsent(struct socket *so, u_int32_t th_ack)
+{
+ struct inpcb *inp = sotoinpcb(so);
+ struct tcpcb *tp = intotcpcb(inp);
+
+ if ((so->so_snd.sb_flags & SB_SNDBYTE_CNT) &&
+ so->so_snd.sb_cc > 0) {
+ int32_t unsent, sent;
+ sent = tp->snd_max - th_ack;
+ if (tp->t_flags & TF_SENTFIN)
+ sent--;
+ unsent = so->so_snd.sb_cc - sent;
+ return (unsent);
+ }
+ return (0);
+}
projects / apple / xnu.git / blobdiff