#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
#endif
#endif /*IPSEC*/
+#undef tcp_minmssoverload
+
#if CONFIG_MACF_NET
#include <security/mac_framework.h>
#endif /* MAC_NET */
SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1644, rfc1644, CTLFLAG_RW,
&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,
"Enable tcp_drain routine for extra help when low on mbufs");
SYSCTL_INT(_net_inet_tcp, OID_AUTO, rtt_min, CTLFLAG_RW,
&tcp_TCPTV_MIN, 0, "min rtt value allowed");
+__private_extern__ int tcp_use_randomport = 0;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, randomize_ports, CTLFLAG_RW,
+ &tcp_use_randomport, 0, "Randomize TCP port numbers");
+
static void tcp_cleartaocache(void);
static void tcp_notify(struct inpcb *, int);
struct zone *sack_hole_zone;
#define TCBHASHSIZE CONFIG_TCBHASHSIZE
#endif
+__private_extern__ int tcp_tcbhashsize = TCBHASHSIZE;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, tcbhashsize, CTLFLAG_RD,
+ &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
#undef ALIGNMENT
#undef ALIGNM1
-static struct tcpcb dummy_tcb;
-
-
extern struct inpcbhead time_wait_slots[];
-extern int cur_tw_slot;
-extern u_long *delack_bitmask;
-extern u_long route_generation;
+extern u_int32_t *delack_bitmask;
int get_inpcb_str_size(void);
int get_tcp_str_size(void);
+static void tcpcb_to_otcpcb(struct tcpcb *, struct otcpcb *);
int get_inpcb_str_size(void)
{
void
tcp_init()
{
- int hashsize = TCBHASHSIZE;
vm_size_t str_size;
int i;
struct inpcbinfo *pcbinfo;
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);
tcbinfo.ipi_zone = (void *) zinit(str_size, 120000*str_size, 8192, "tcpcb");
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
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);
+ delack_bitmask = _MALLOC((4 * tcp_tcbhashsize)/32, M_PCB, M_WAITOK);
if (delack_bitmask == 0)
panic("Delack Memory");
if (tp) {
if (!(flags & TH_RST)) {
win = tcp_sbspace(tp);
- if (win > (long)TCP_MAXWIN << tp->rcv_scale)
- win = (long)TCP_MAXWIN << tp->rcv_scale;
+ if (win > (int32_t)TCP_MAXWIN << tp->rcv_scale)
+ win = (int32_t)TCP_MAXWIN << tp->rcv_scale;
}
#if INET6
if (isipv6)
mac_netinet_tcp_reply(m);
}
#endif
-
-#if CONFIG_IP_EDGEHOLE
- if (tp && tp->t_inpcb)
- ip_edgehole_mbuf_tag(tp->t_inpcb, m);
-#endif
-
+
nth->th_seq = htonl(seq);
nth->th_ack = htonl(ack);
nth->th_x2 = 0;
return;
}
#endif
+#if PKT_PRIORITY
+ if (tp != NULL && soisbackground(tp->t_inpcb->inp_socket))
+ m_prio_background(m);
+#endif /* PKT_PRIORITY */
#if INET6
if (isipv6) {
(void)ip6_output(m, NULL, ro6, 0, NULL, NULL, 0);
{
struct ip_out_args ipoa = { ifscope };
- (void) ip_output(m, NULL, ro, IP_OUTARGS, NULL, &ipoa);
+ 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 && ro->ro_rt) {
- rtfree(ro->ro_rt);
- ro->ro_rt = NULL;
+ if (ro != &sro) {
+ /* Synchronize cached PCB route */
+ inp_route_copyin(tp->t_inpcb, &sro);
+ } else if (sro.ro_rt != NULL) {
+ rtfree(sro.ro_rt);
}
}
}
#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);
}
- lck_mtx_lock(rt_mtx);
+#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,
* save the rtt and rttvar in the routing entry.
* 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 (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)
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 / (TCP_RETRANSHZ * TCP_RTT_SCALE));
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 ((so->so_flags & SOF_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:
- /* free the reassembly queue, if any */
- lck_mtx_unlock(rt_mtx);
+no_valid_rt:
+ if (rt != NULL)
+ RT_UNLOCK(rt);
+
+ /* free the reassembly queue, if any */
(void) tcp_freeq(tp);
tcp_free_sackholes(tp);
#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; 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
{
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);
SYSCTL_PROC(_net_inet_tcp, TCPCTL_PCBLIST, pcblist, CTLFLAG_RD, 0, 0,
tcp_pcblist, "S,xtcpcb", "List of active TCP connections");
-#ifndef __APPLE__
-static int
-tcp_getcred(SYSCTL_HANDLER_ARGS)
+#if !CONFIG_EMBEDDED
+
+static void
+tcpcb_to_xtcpcb64(struct tcpcb *tp, struct xtcpcb64 *otp)
{
- 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);
+ 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; 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;
}
-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");
-#if INET6
static int
-tcp6_getcred(SYSCTL_HANDLER_ARGS)
+tcp_pcblist64 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, i, n;
+ struct inpcb *inp, **inp_list;
+ inp_gen_t gencnt;
+ struct xinpgen xig;
+ int slot;
-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");
+ /*
+ * 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
-#endif /* __APPLE__*/
+ 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, pcblist64, CTLFLAG_RD, 0, 0,
+ tcp_pcblist64, "S,xtcpcb64", "List of active TCP connections");
+
+#endif /* !CONFIG_EMBEDDED */
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);
+ } else {
+ in6_pcbnotify(&tcbinfo, sa, 0,
+ (struct sockaddr *)(size_t)sa6_src, 0, cmd, notify);
+ }
}
#endif /* INET6 */
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;
- tp->t_bytes_acked = 0;
- }
-}
/*
* When a specific ICMP unreachable message is received and the
#endif /* INET6 */
if (tp) {
- lck_mtx_lock(rt_mtx);
#if INET6
if (isipv6)
rt = tcp_rtlookup6(inp);
isipv6 ? tcp_v6mssdflt :
#endif /* INET6 */
tcp_mssdflt;
- lck_mtx_unlock(rt_mtx);
+
+ /* Route locked during lookup above */
+ if (rt != NULL)
+ RT_UNLOCK(rt);
return;
}
taop = rmx_taop(rt->rt_rmx);
#endif /* INET6 */
;
- lck_mtx_unlock(rt_mtx);
+ /* Route locked during lookup above */
+ RT_UNLOCK(rt);
+
if (offered)
mss = min(mss, offered);
/*
/*
* Look-up the routing entry to the peer of this inpcb. If no route
- * is found and it cannot be allocated then return NULL. This routine
+ * 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, input_ifscope)
struct rtentry *rt;
struct tcpcb *tp;
- ro = &inp->inp_route;
- if (ro == NULL)
- return (NULL);
- rt = ro->ro_rt;
+ lck_mtx_assert(rnh_lock, LCK_MTX_ASSERT_NOTOWNED);
- lck_mtx_assert(rt_mtx, LCK_MTX_ASSERT_OWNED);
+ ro = &inp->inp_route;
+ if ((rt = ro->ro_rt) != NULL)
+ RT_LOCK(rt);
- if (rt == NULL || !(rt->rt_flags & RTF_UP) || rt->generation_id != route_generation) {
+ 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;
ifscope = (inp->inp_flags & INP_BOUND_IF) ?
inp->inp_boundif : input_ifscope;
- rtalloc_scoped_ign_locked(ro, 0UL, ifscope);
- rt = ro->ro_rt;
+ if (rt != NULL)
+ RT_UNLOCK(rt);
+ rtalloc_scoped_ign(ro, 0, ifscope);
+ if ((rt = ro->ro_rt) != NULL)
+ RT_LOCK(rt);
}
}
- if (rt != NULL && rt->rt_ifp != NULL)
- somultipages(inp->inp_socket,
- (rt->rt_ifp->if_hwassist & IFNET_MULTIPAGES));
/*
* Update MTU discovery determination. Don't do it if:
else
tp->t_flags |= TF_PMTUD;
-#ifdef IFEF_NOWINDOWSCALE
- if (tp->t_state == TCPS_SYN_SENT && rt != NULL && rt->rt_ifp != NULL &&
- (rt->rt_ifp->if_eflags & IFEF_NOWINDOWSCALE) != 0)
- {
- // Timestamps are not enabled on this interface
- tp->t_flags &= ~(TF_REQ_SCALE);
+#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;
}
struct rtentry *rt;
struct tcpcb *tp;
- lck_mtx_assert(rt_mtx, LCK_MTX_ASSERT_OWNED);
+ 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;
dst6->sin6_family = AF_INET6;
dst6->sin6_len = sizeof(*dst6);
dst6->sin6_addr = inp->in6p_faddr;
- rtalloc_ign_locked((struct route *)ro6, 0UL);
- rt = ro6->ro_rt;
+ if (rt != NULL)
+ RT_UNLOCK(rt);
+ rtalloc_ign((struct route *)ro6, 0);
+ if ((rt = ro6->ro_rt) != NULL)
+ RT_LOCK(rt);
}
}
- if (rt != NULL && rt->rt_ifp != NULL)
- somultipages(inp->inp_socket,
- (rt->rt_ifp->if_hwassist & IFNET_MULTIPAGES));
/*
* Update path MTU Discovery determination
* while looking up the route:
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 */
struct rtentry *rt;
struct rmxp_tao *taop;
- lck_mtx_lock(rt_mtx);
#if INET6
if ((inp->inp_vflag & INP_IPV6) != 0)
rt = tcp_rtlookup6(inp);
/* Make sure this is a host route and is up. */
if (rt == NULL ||
(rt->rt_flags & (RTF_UP|RTF_HOST)) != (RTF_UP|RTF_HOST)) {
- lck_mtx_unlock(rt_mtx);
+ /* Route locked during lookup above */
+ if (rt != NULL)
+ RT_UNLOCK(rt);
return NULL;
}
taop = rmx_taop(rt->rt_rmx);
- lck_mtx_unlock(rt_mtx);
+ /* 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;
- if (lr == 0)
- lr_saved = (unsigned int) __builtin_return_address(0);
- else lr_saved = lr;
+ void *lr_saved;
+
+ if (lr == NULL)
+ lr_saved = __builtin_return_address(0);
+ else
+ lr_saved = lr;
- if (so->so_pcb) {
+ 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 */
}
- else {
- panic("tcp_lock: so=%p NO PCB! lr=%x\n", so, lr_saved);
- lck_mtx_lock(so->so_proto->pr_domain->dom_mtx);
- }
-
- if (so->so_usecount < 0)
- panic("tcp_lock: so=%p so_pcb=%p 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->lock_lr[so->next_lock_lr] = (u_int32_t)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;
- if (lr == 0)
- lr_saved = (unsigned int) __builtin_return_address(0);
- else lr_saved = lr;
+ void *lr_saved;
+
+ if (lr == NULL)
+ lr_saved = __builtin_return_address(0);
+ else
+ lr_saved = lr;
#ifdef MORE_TCPLOCK_DEBUG
- printf("tcp_unlock: so=%p 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=%p usecount=%x\n", so, so->so_usecount);
- if (so->so_pcb == NULL)
- panic("tcp_unlock: so=%p NO PCB usecount=%x lr=%x\n", so, so->so_usecount, lr_saved);
- else {
- lck_mtx_assert(((struct inpcb *)so->so_pcb)->inpcb_mtx, LCK_MTX_ASSERT_OWNED);
- so->unlock_lr[so->next_unlock_lr] = (u_int32_t)lr_saved;
+ if (so->so_usecount < 0) {
+ 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",
+ 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);
}
if (so->so_pcb) {
if (so->so_usecount < 0)
- panic("tcp_getlock: so=%p usecount=%x\n", so, so->so_usecount);
+ 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\n", so);
+ panic("tcp_getlock: so=%p NULL so_pcb %s\n",
+ so, solockhistory_nr(so));
return (so->so_proto->pr_domain->dom_mtx);
}
}
-long
+
+int32_t
tcp_sbspace(struct tcpcb *tp)
{
struct sockbuf *sb = &tp->t_inpcb->inp_socket->so_rcv;
- long space, newspace;
+ int32_t space, newspace;
- space = ((long) lmin((sb->sb_hiwat - sb->sb_cc),
+ space = ((int32_t) imin((sb->sb_hiwat - sb->sb_cc),
(sb->sb_mbmax - sb->sb_mbcnt)));
+ if (space < 0)
+ space = 0;
#if TRAFFIC_MGT
- if (tp->t_inpcb->inp_socket->so_traffic_mgt_flags & TRAFFIC_MGT_SO_BACKGROUND) {
+ if (tp->t_inpcb->inp_socket->so_traffic_mgt_flags & TRAFFIC_MGT_SO_BG_REGULATE) {
if (tcp_background_io_enabled &&
tp->t_inpcb->inp_socket->so_traffic_mgt_flags & TRAFFIC_MGT_SO_BG_SUPPRESSED) {
tp->t_flags |= TF_RXWIN0SENT;
/* Clip window size for slower link */
if (((tp->t_flags & TF_SLOWLINK) != 0) && slowlink_wsize > 0 )
- return lmin(space, slowlink_wsize);
+ return imin(space, slowlink_wsize);
/*
* Check for ressources constraints before over-ajusting the amount of space we can
if (sbspace_factor && (tp->t_inpcb->inp_pcbinfo->ipi_count < tcp_sockthreshold) &&
(total_mb_cnt / 8) < (mbstat.m_clusters / sbspace_factor)) {
- if (space < (long)(sb->sb_maxused - sb->sb_cc)) {/* make sure we don't constrain the window if we have enough ressources */
- space = (long) lmax((sb->sb_maxused - sb->sb_cc), tp->rcv_maxbyps);
+ 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 = (long) lmax(((long)sb->sb_maxused - sb->sb_cc), (long)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) {
+ /*
+ * Radar 6921834: Disable TSO IPv6 because there is no support
+ * for TSO & HW checksum in ip6_output yet
+ */
+#if 0
+ 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;
+
+#endif
+ } 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;
+ }
+}
/* DSEP Review Done pl-20051213-v02 @3253,@3391,@3400 */
projects / apple / xnu.git / blobdiff