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darling-xnu/bsd/net/ntstat.c
Thomas A cdbc10b677 Upload xnu-7195.141.2 Source
2023-05-16 21:41:14 -07:00

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/*
* Copyright (c) 2010-2020 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
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, 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@
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/kpi_mbuf.h>
#include <sys/socket.h>
#include <sys/kern_control.h>
#include <sys/mcache.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/queue.h>
#include <sys/priv.h>
#include <sys/protosw.h>
#include <kern/clock.h>
#include <kern/debug.h>
#include <libkern/libkern.h>
#include <libkern/OSAtomic.h>
#include <libkern/locks.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_types.h>
#include <net/route.h>
// These includes appear in ntstat.h but we include them here first so they won't trigger
// any clang diagnostic errors.
#include <netinet/in.h>
#include <netinet/in_stat.h>
#include <netinet/tcp.h>
#pragma clang diagnostic push
#pragma clang diagnostic error "-Wpadded"
#pragma clang diagnostic error "-Wpacked"
// This header defines structures shared with user space, so we need to ensure there is
// no compiler inserted padding in case the user space process isn't using the same
// architecture as the kernel (example: i386 process with x86_64 kernel).
#include <net/ntstat.h>
#pragma clang diagnostic pop
#include <netinet/ip_var.h>
#include <netinet/in_pcb.h>
#include <netinet/in_var.h>
#include <netinet/tcp_var.h>
#include <netinet/tcp_fsm.h>
#include <netinet/tcp_cc.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <netinet6/in6_pcb.h>
#include <netinet6/in6_var.h>
__private_extern__ int nstat_collect = 1;
#if (DEBUG || DEVELOPMENT)
SYSCTL_INT(_net, OID_AUTO, statistics, CTLFLAG_RW | CTLFLAG_LOCKED,
&nstat_collect, 0, "Collect detailed statistics");
#endif /* (DEBUG || DEVELOPMENT) */
#if !XNU_TARGET_OS_OSX
static int nstat_privcheck = 1;
#else /* XNU_TARGET_OS_OSX */
static int nstat_privcheck = 0;
#endif /* XNU_TARGET_OS_OSX */
SYSCTL_INT(_net, OID_AUTO, statistics_privcheck, CTLFLAG_RW | CTLFLAG_LOCKED,
&nstat_privcheck, 0, "Entitlement check");
SYSCTL_NODE(_net, OID_AUTO, stats,
CTLFLAG_RW | CTLFLAG_LOCKED, 0, "network statistics");
static int nstat_debug = 0;
SYSCTL_INT(_net_stats, OID_AUTO, debug, CTLFLAG_RW | CTLFLAG_LOCKED,
&nstat_debug, 0, "");
static int nstat_sendspace = 2048;
SYSCTL_INT(_net_stats, OID_AUTO, sendspace, CTLFLAG_RW | CTLFLAG_LOCKED,
&nstat_sendspace, 0, "");
static int nstat_recvspace = 8192;
SYSCTL_INT(_net_stats, OID_AUTO, recvspace, CTLFLAG_RW | CTLFLAG_LOCKED,
&nstat_recvspace, 0, "");
static struct nstat_stats nstat_stats;
SYSCTL_STRUCT(_net_stats, OID_AUTO, stats, CTLFLAG_RD | CTLFLAG_LOCKED,
&nstat_stats, nstat_stats, "");
static u_int32_t nstat_lim_interval = 30 * 60; /* Report interval, seconds */
static u_int32_t nstat_lim_min_tx_pkts = 100;
static u_int32_t nstat_lim_min_rx_pkts = 100;
#if (DEBUG || DEVELOPMENT)
SYSCTL_INT(_net_stats, OID_AUTO, lim_report_interval,
CTLFLAG_RW | CTLFLAG_LOCKED, &nstat_lim_interval, 0,
"Low internet stat report interval");
SYSCTL_INT(_net_stats, OID_AUTO, lim_min_tx_pkts,
CTLFLAG_RW | CTLFLAG_LOCKED, &nstat_lim_min_tx_pkts, 0,
"Low Internet, min transmit packets threshold");
SYSCTL_INT(_net_stats, OID_AUTO, lim_min_rx_pkts,
CTLFLAG_RW | CTLFLAG_LOCKED, &nstat_lim_min_rx_pkts, 0,
"Low Internet, min receive packets threshold");
#endif /* DEBUG || DEVELOPMENT */
static struct net_api_stats net_api_stats_before;
static u_int64_t net_api_stats_last_report_time;
#define NET_API_STATS_REPORT_INTERVAL (12 * 60 * 60) /* 12 hours, in seconds */
static u_int32_t net_api_stats_report_interval = NET_API_STATS_REPORT_INTERVAL;
#if (DEBUG || DEVELOPMENT)
SYSCTL_UINT(_net_stats, OID_AUTO, api_report_interval,
CTLFLAG_RW | CTLFLAG_LOCKED, &net_api_stats_report_interval, 0, "");
#endif /* DEBUG || DEVELOPMENT */
enum{
NSTAT_FLAG_CLEANUP = (1 << 0),
NSTAT_FLAG_REQCOUNTS = (1 << 1),
NSTAT_FLAG_SUPPORTS_UPDATES = (1 << 2),
NSTAT_FLAG_SYSINFO_SUBSCRIBED = (1 << 3),
};
#if !XNU_TARGET_OS_OSX
#define QUERY_CONTINUATION_SRC_COUNT 50
#else /* XNU_TARGET_OS_OSX */
#define QUERY_CONTINUATION_SRC_COUNT 100
#endif /* XNU_TARGET_OS_OSX */
typedef TAILQ_HEAD(, nstat_src) tailq_head_nstat_src;
typedef TAILQ_ENTRY(nstat_src) tailq_entry_nstat_src;
typedef struct nstat_provider_filter {
u_int64_t npf_flags;
u_int64_t npf_events;
pid_t npf_pid;
uuid_t npf_uuid;
} nstat_provider_filter;
typedef struct nstat_control_state {
struct nstat_control_state *ncs_next;
u_int32_t ncs_watching;
decl_lck_mtx_data(, ncs_mtx);
kern_ctl_ref ncs_kctl;
u_int32_t ncs_unit;
nstat_src_ref_t ncs_next_srcref;
tailq_head_nstat_src ncs_src_queue;
mbuf_t ncs_accumulated;
u_int32_t ncs_flags;
nstat_provider_filter ncs_provider_filters[NSTAT_PROVIDER_COUNT];
/* state maintained for partial query requests */
u_int64_t ncs_context;
u_int64_t ncs_seq;
} nstat_control_state;
typedef struct nstat_provider {
struct nstat_provider *next;
nstat_provider_id_t nstat_provider_id;
size_t nstat_descriptor_length;
errno_t (*nstat_lookup)(const void *data, u_int32_t length, nstat_provider_cookie_t *out_cookie);
int (*nstat_gone)(nstat_provider_cookie_t cookie);
errno_t (*nstat_counts)(nstat_provider_cookie_t cookie, struct nstat_counts *out_counts, int *out_gone);
errno_t (*nstat_watcher_add)(nstat_control_state *state, nstat_msg_add_all_srcs *req);
void (*nstat_watcher_remove)(nstat_control_state *state);
errno_t (*nstat_copy_descriptor)(nstat_provider_cookie_t cookie, void *data, size_t len);
void (*nstat_release)(nstat_provider_cookie_t cookie, boolean_t locked);
bool (*nstat_reporting_allowed)(nstat_provider_cookie_t cookie, nstat_provider_filter *filter);
} nstat_provider;
typedef STAILQ_HEAD(, nstat_src) stailq_head_nstat_src;
typedef STAILQ_ENTRY(nstat_src) stailq_entry_nstat_src;
typedef TAILQ_HEAD(, nstat_tu_shadow) tailq_head_tu_shadow;
typedef TAILQ_ENTRY(nstat_tu_shadow) tailq_entry_tu_shadow;
typedef TAILQ_HEAD(, nstat_procdetails) tailq_head_procdetails;
typedef TAILQ_ENTRY(nstat_procdetails) tailq_entry_procdetails;
typedef struct nstat_src {
tailq_entry_nstat_src ns_control_link; // All sources for the nstat_control_state, for iterating over.
nstat_control_state *ns_control; // The nstat_control_state that this is a source for
nstat_src_ref_t srcref;
nstat_provider *provider;
nstat_provider_cookie_t cookie;
uint32_t filter;
uint64_t seq;
} nstat_src;
static errno_t nstat_control_send_counts(nstat_control_state *, nstat_src *, unsigned long long, u_int16_t, int *);
static int nstat_control_send_description(nstat_control_state *state, nstat_src *src, u_int64_t context, u_int16_t hdr_flags);
static int nstat_control_send_update(nstat_control_state *state, nstat_src *src, u_int64_t context, u_int64_t event, u_int16_t hdr_flags, int *gone);
static errno_t nstat_control_send_removed(nstat_control_state *, nstat_src *);
static errno_t nstat_control_send_goodbye(nstat_control_state *state, nstat_src *src);
static void nstat_control_cleanup_source(nstat_control_state *state, nstat_src *src, boolean_t);
static bool nstat_control_reporting_allowed(nstat_control_state *state, nstat_src *src);
static boolean_t nstat_control_begin_query(nstat_control_state *state, const nstat_msg_hdr *hdrp);
static u_int16_t nstat_control_end_query(nstat_control_state *state, nstat_src *last_src, boolean_t partial);
static void nstat_ifnet_report_ecn_stats(void);
static void nstat_ifnet_report_lim_stats(void);
static void nstat_net_api_report_stats(void);
static errno_t nstat_set_provider_filter( nstat_control_state *state, nstat_msg_add_all_srcs *req);
static errno_t nstat_control_send_event(nstat_control_state *state, nstat_src *src, u_int64_t event);
static u_int32_t nstat_udp_watchers = 0;
static u_int32_t nstat_tcp_watchers = 0;
static void nstat_control_register(void);
/*
* The lock order is as follows:
*
* socket_lock (inpcb)
* nstat_mtx
* state->ncs_mtx
*/
static KALLOC_HEAP_DEFINE(KHEAP_NET_STAT, NET_STAT_CONTROL_NAME,
KHEAP_ID_DEFAULT);
static nstat_control_state *nstat_controls = NULL;
static uint64_t nstat_idle_time = 0;
static decl_lck_mtx_data(, nstat_mtx);
/* some extern definitions */
extern void mbuf_report_peak_usage(void);
extern void tcp_report_stats(void);
static void
nstat_copy_sa_out(
const struct sockaddr *src,
struct sockaddr *dst,
int maxlen)
{
if (src->sa_len > maxlen) {
return;
}
bcopy(src, dst, src->sa_len);
if (src->sa_family == AF_INET6 &&
src->sa_len >= sizeof(struct sockaddr_in6)) {
struct sockaddr_in6 *sin6 = (struct sockaddr_in6*)(void *)dst;
if (IN6_IS_SCOPE_EMBED(&sin6->sin6_addr)) {
if (sin6->sin6_scope_id == 0) {
sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
}
sin6->sin6_addr.s6_addr16[1] = 0;
}
}
}
static void
nstat_ip_to_sockaddr(
const struct in_addr *ip,
u_int16_t port,
struct sockaddr_in *sin,
u_int32_t maxlen)
{
if (maxlen < sizeof(struct sockaddr_in)) {
return;
}
sin->sin_family = AF_INET;
sin->sin_len = sizeof(*sin);
sin->sin_port = port;
sin->sin_addr = *ip;
}
u_int16_t
nstat_ifnet_to_flags(
struct ifnet *ifp)
{
u_int16_t flags = 0;
u_int32_t functional_type = if_functional_type(ifp, FALSE);
/* Panic if someone adds a functional type without updating ntstat. */
VERIFY(0 <= functional_type && functional_type <= IFRTYPE_FUNCTIONAL_LAST);
switch (functional_type) {
case IFRTYPE_FUNCTIONAL_UNKNOWN:
flags |= NSTAT_IFNET_IS_UNKNOWN_TYPE;
break;
case IFRTYPE_FUNCTIONAL_LOOPBACK:
flags |= NSTAT_IFNET_IS_LOOPBACK;
break;
case IFRTYPE_FUNCTIONAL_WIRED:
case IFRTYPE_FUNCTIONAL_INTCOPROC:
flags |= NSTAT_IFNET_IS_WIRED;
break;
case IFRTYPE_FUNCTIONAL_WIFI_INFRA:
flags |= NSTAT_IFNET_IS_WIFI;
break;
case IFRTYPE_FUNCTIONAL_WIFI_AWDL:
flags |= NSTAT_IFNET_IS_WIFI;
flags |= NSTAT_IFNET_IS_AWDL;
break;
case IFRTYPE_FUNCTIONAL_CELLULAR:
flags |= NSTAT_IFNET_IS_CELLULAR;
break;
case IFRTYPE_FUNCTIONAL_COMPANIONLINK:
flags |= NSTAT_IFNET_IS_COMPANIONLINK;
break;
}
if (IFNET_IS_EXPENSIVE(ifp)) {
flags |= NSTAT_IFNET_IS_EXPENSIVE;
}
if (IFNET_IS_CONSTRAINED(ifp)) {
flags |= NSTAT_IFNET_IS_CONSTRAINED;
}
return flags;
}
static u_int16_t
nstat_inpcb_to_flags(
const struct inpcb *inp)
{
u_int16_t flags = 0;
if (inp != NULL) {
if (inp->inp_last_outifp != NULL) {
struct ifnet *ifp = inp->inp_last_outifp;
flags = nstat_ifnet_to_flags(ifp);
struct tcpcb *tp = intotcpcb(inp);
if (tp) {
if (tp->t_flags & TF_LOCAL) {
flags |= NSTAT_IFNET_IS_LOCAL;
} else {
flags |= NSTAT_IFNET_IS_NON_LOCAL;
}
}
} else {
flags = NSTAT_IFNET_IS_UNKNOWN_TYPE;
}
if (inp->inp_socket != NULL &&
(inp->inp_socket->so_flags1 & SOF1_CELLFALLBACK)) {
flags |= NSTAT_IFNET_VIA_CELLFALLBACK;
}
}
return flags;
}
#pragma mark -- Network Statistic Providers --
static errno_t nstat_control_source_add(u_int64_t context, nstat_control_state *state, nstat_provider *provider, nstat_provider_cookie_t cookie);
struct nstat_provider *nstat_providers = NULL;
static struct nstat_provider*
nstat_find_provider_by_id(
nstat_provider_id_t id)
{
struct nstat_provider *provider;
for (provider = nstat_providers; provider != NULL; provider = provider->next) {
if (provider->nstat_provider_id == id) {
break;
}
}
return provider;
}
static errno_t
nstat_lookup_entry(
nstat_provider_id_t id,
const void *data,
u_int32_t length,
nstat_provider **out_provider,
nstat_provider_cookie_t *out_cookie)
{
*out_provider = nstat_find_provider_by_id(id);
if (*out_provider == NULL) {
return ENOENT;
}
return (*out_provider)->nstat_lookup(data, length, out_cookie);
}
static void nstat_init_route_provider(void);
static void nstat_init_tcp_provider(void);
static void nstat_init_udp_provider(void);
static void nstat_init_ifnet_provider(void);
__private_extern__ void
nstat_init(void)
{
nstat_init_route_provider();
nstat_init_tcp_provider();
nstat_init_udp_provider();
nstat_init_ifnet_provider();
nstat_control_register();
}
#pragma mark -- Aligned Buffer Allocation --
struct align_header {
u_int32_t offset;
u_int32_t length;
};
static void*
nstat_malloc_aligned(
size_t length,
u_int8_t alignment,
zalloc_flags_t flags)
{
struct align_header *hdr = NULL;
size_t size = length + sizeof(*hdr) + alignment - 1;
// Arbitrary limit to prevent abuse
if (length > (64 * 1024)) {
return NULL;
}
u_int8_t *buffer = kheap_alloc(KHEAP_NET_STAT, size, flags);
if (buffer == NULL) {
return NULL;
}
u_int8_t *aligned = buffer + sizeof(*hdr);
aligned = (u_int8_t*)P2ROUNDUP(aligned, alignment);
hdr = (struct align_header*)(void *)(aligned - sizeof(*hdr));
hdr->offset = aligned - buffer;
hdr->length = size;
return aligned;
}
static void
nstat_free_aligned(
void *buffer)
{
struct align_header *hdr = (struct align_header*)(void *)((u_int8_t*)buffer - sizeof(*hdr));
(kheap_free)(KHEAP_NET_STAT, (char *)buffer - hdr->offset, hdr->length);
}
#pragma mark -- Route Provider --
static nstat_provider nstat_route_provider;
static errno_t
nstat_route_lookup(
const void *data,
u_int32_t length,
nstat_provider_cookie_t *out_cookie)
{
// rt_lookup doesn't take const params but it doesn't modify the parameters for
// the lookup. So...we use a union to eliminate the warning.
union{
struct sockaddr *sa;
const struct sockaddr *const_sa;
} dst, mask;
const nstat_route_add_param *param = (const nstat_route_add_param*)data;
*out_cookie = NULL;
if (length < sizeof(*param)) {
return EINVAL;
}
if (param->dst.v4.sin_family == 0 ||
param->dst.v4.sin_family > AF_MAX ||
(param->mask.v4.sin_family != 0 && param->mask.v4.sin_family != param->dst.v4.sin_family)) {
return EINVAL;
}
if (param->dst.v4.sin_len > sizeof(param->dst) ||
(param->mask.v4.sin_family && param->mask.v4.sin_len > sizeof(param->mask.v4.sin_len))) {
return EINVAL;
}
if ((param->dst.v4.sin_family == AF_INET &&
param->dst.v4.sin_len < sizeof(struct sockaddr_in)) ||
(param->dst.v6.sin6_family == AF_INET6 &&
param->dst.v6.sin6_len < sizeof(struct sockaddr_in6))) {
return EINVAL;
}
dst.const_sa = (const struct sockaddr*)&param->dst;
mask.const_sa = param->mask.v4.sin_family ? (const struct sockaddr*)&param->mask : NULL;
struct radix_node_head *rnh = rt_tables[dst.sa->sa_family];
if (rnh == NULL) {
return EAFNOSUPPORT;
}
lck_mtx_lock(rnh_lock);
struct rtentry *rt = rt_lookup(TRUE, dst.sa, mask.sa, rnh, param->ifindex);
lck_mtx_unlock(rnh_lock);
if (rt) {
*out_cookie = (nstat_provider_cookie_t)rt;
}
return rt ? 0 : ENOENT;
}
static int
nstat_route_gone(
nstat_provider_cookie_t cookie)
{
struct rtentry *rt = (struct rtentry*)cookie;
return ((rt->rt_flags & RTF_UP) == 0) ? 1 : 0;
}
static errno_t
nstat_route_counts(
nstat_provider_cookie_t cookie,
struct nstat_counts *out_counts,
int *out_gone)
{
struct rtentry *rt = (struct rtentry*)cookie;
struct nstat_counts *rt_stats = rt->rt_stats;
if (out_gone) {
*out_gone = 0;
}
if (out_gone && (rt->rt_flags & RTF_UP) == 0) {
*out_gone = 1;
}
if (rt_stats) {
atomic_get_64(out_counts->nstat_rxpackets, &rt_stats->nstat_rxpackets);
atomic_get_64(out_counts->nstat_rxbytes, &rt_stats->nstat_rxbytes);
atomic_get_64(out_counts->nstat_txpackets, &rt_stats->nstat_txpackets);
atomic_get_64(out_counts->nstat_txbytes, &rt_stats->nstat_txbytes);
out_counts->nstat_rxduplicatebytes = rt_stats->nstat_rxduplicatebytes;
out_counts->nstat_rxoutoforderbytes = rt_stats->nstat_rxoutoforderbytes;
out_counts->nstat_txretransmit = rt_stats->nstat_txretransmit;
out_counts->nstat_connectattempts = rt_stats->nstat_connectattempts;
out_counts->nstat_connectsuccesses = rt_stats->nstat_connectsuccesses;
out_counts->nstat_min_rtt = rt_stats->nstat_min_rtt;
out_counts->nstat_avg_rtt = rt_stats->nstat_avg_rtt;
out_counts->nstat_var_rtt = rt_stats->nstat_var_rtt;
out_counts->nstat_cell_rxbytes = out_counts->nstat_cell_txbytes = 0;
} else {
bzero(out_counts, sizeof(*out_counts));
}
return 0;
}
static void
nstat_route_release(
nstat_provider_cookie_t cookie,
__unused int locked)
{
rtfree((struct rtentry*)cookie);
}
static u_int32_t nstat_route_watchers = 0;
static int
nstat_route_walktree_add(
struct radix_node *rn,
void *context)
{
errno_t result = 0;
struct rtentry *rt = (struct rtentry *)rn;
nstat_control_state *state = (nstat_control_state*)context;
LCK_MTX_ASSERT(rnh_lock, LCK_MTX_ASSERT_OWNED);
/* RTF_UP can't change while rnh_lock is held */
if ((rt->rt_flags & RTF_UP) != 0) {
/* Clear RTPRF_OURS if the route is still usable */
RT_LOCK(rt);
if (rt_validate(rt)) {
RT_ADDREF_LOCKED(rt);
RT_UNLOCK(rt);
} else {
RT_UNLOCK(rt);
rt = NULL;
}
/* Otherwise if RTF_CONDEMNED, treat it as if it were down */
if (rt == NULL) {
return 0;
}
result = nstat_control_source_add(0, state, &nstat_route_provider, rt);
if (result != 0) {
rtfree_locked(rt);
}
}
return result;
}
static errno_t
nstat_route_add_watcher(
nstat_control_state *state,
nstat_msg_add_all_srcs *req)
{
int i;
errno_t result = 0;
lck_mtx_lock(rnh_lock);
result = nstat_set_provider_filter(state, req);
if (result == 0) {
OSIncrementAtomic(&nstat_route_watchers);
for (i = 1; i < AF_MAX; i++) {
struct radix_node_head *rnh;
rnh = rt_tables[i];
if (!rnh) {
continue;
}
result = rnh->rnh_walktree(rnh, nstat_route_walktree_add, state);
if (result != 0) {
// This is probably resource exhaustion.
// There currently isn't a good way to recover from this.
// Least bad seems to be to give up on the add-all but leave
// the watcher in place.
break;
}
}
}
lck_mtx_unlock(rnh_lock);
return result;
}
__private_extern__ void
nstat_route_new_entry(
struct rtentry *rt)
{
if (nstat_route_watchers == 0) {
return;
}
lck_mtx_lock(&nstat_mtx);
if ((rt->rt_flags & RTF_UP) != 0) {
nstat_control_state *state;
for (state = nstat_controls; state; state = state->ncs_next) {
if ((state->ncs_watching & (1 << NSTAT_PROVIDER_ROUTE)) != 0) {
// this client is watching routes
// acquire a reference for the route
RT_ADDREF(rt);
// add the source, if that fails, release the reference
if (nstat_control_source_add(0, state, &nstat_route_provider, rt) != 0) {
RT_REMREF(rt);
}
}
}
}
lck_mtx_unlock(&nstat_mtx);
}
static void
nstat_route_remove_watcher(
__unused nstat_control_state *state)
{
OSDecrementAtomic(&nstat_route_watchers);
}
static errno_t
nstat_route_copy_descriptor(
nstat_provider_cookie_t cookie,
void *data,
size_t len)
{
nstat_route_descriptor *desc = (nstat_route_descriptor*)data;
if (len < sizeof(*desc)) {
return EINVAL;
}
bzero(desc, sizeof(*desc));
struct rtentry *rt = (struct rtentry*)cookie;
desc->id = (uint64_t)VM_KERNEL_ADDRPERM(rt);
desc->parent_id = (uint64_t)VM_KERNEL_ADDRPERM(rt->rt_parent);
desc->gateway_id = (uint64_t)VM_KERNEL_ADDRPERM(rt->rt_gwroute);
// key/dest
struct sockaddr *sa;
if ((sa = rt_key(rt))) {
nstat_copy_sa_out(sa, &desc->dst.sa, sizeof(desc->dst));
}
// mask
if ((sa = rt_mask(rt)) && sa->sa_len <= sizeof(desc->mask)) {
memcpy(&desc->mask, sa, sa->sa_len);
}
// gateway
if ((sa = rt->rt_gateway)) {
nstat_copy_sa_out(sa, &desc->gateway.sa, sizeof(desc->gateway));
}
if (rt->rt_ifp) {
desc->ifindex = rt->rt_ifp->if_index;
}
desc->flags = rt->rt_flags;
return 0;
}
static bool
nstat_route_reporting_allowed(nstat_provider_cookie_t cookie, nstat_provider_filter *filter)
{
bool retval = true;
if ((filter->npf_flags & NSTAT_FILTER_IFNET_FLAGS) != 0) {
struct rtentry *rt = (struct rtentry*)cookie;
struct ifnet *ifp = rt->rt_ifp;
if (ifp) {
uint16_t interface_properties = nstat_ifnet_to_flags(ifp);
if ((filter->npf_flags & interface_properties) == 0) {
retval = false;
}
}
}
return retval;
}
static void
nstat_init_route_provider(void)
{
bzero(&nstat_route_provider, sizeof(nstat_route_provider));
nstat_route_provider.nstat_descriptor_length = sizeof(nstat_route_descriptor);
nstat_route_provider.nstat_provider_id = NSTAT_PROVIDER_ROUTE;
nstat_route_provider.nstat_lookup = nstat_route_lookup;
nstat_route_provider.nstat_gone = nstat_route_gone;
nstat_route_provider.nstat_counts = nstat_route_counts;
nstat_route_provider.nstat_release = nstat_route_release;
nstat_route_provider.nstat_watcher_add = nstat_route_add_watcher;
nstat_route_provider.nstat_watcher_remove = nstat_route_remove_watcher;
nstat_route_provider.nstat_copy_descriptor = nstat_route_copy_descriptor;
nstat_route_provider.nstat_reporting_allowed = nstat_route_reporting_allowed;
nstat_route_provider.next = nstat_providers;
nstat_providers = &nstat_route_provider;
}
#pragma mark -- Route Collection --
__private_extern__ struct nstat_counts*
nstat_route_attach(
struct rtentry *rte)
{
struct nstat_counts *result = rte->rt_stats;
if (result) {
return result;
}
result = nstat_malloc_aligned(sizeof(*result), sizeof(u_int64_t),
Z_WAITOK | Z_ZERO);
if (!result) {
return result;
}
if (!OSCompareAndSwapPtr(NULL, result, &rte->rt_stats)) {
nstat_free_aligned(result);
result = rte->rt_stats;
}
return result;
}
__private_extern__ void
nstat_route_detach(
struct rtentry *rte)
{
if (rte->rt_stats) {
nstat_free_aligned(rte->rt_stats);
rte->rt_stats = NULL;
}
}
__private_extern__ void
nstat_route_connect_attempt(
struct rtentry *rte)
{
while (rte) {
struct nstat_counts* stats = nstat_route_attach(rte);
if (stats) {
OSIncrementAtomic(&stats->nstat_connectattempts);
}
rte = rte->rt_parent;
}
}
__private_extern__ void
nstat_route_connect_success(
struct rtentry *rte)
{
// This route
while (rte) {
struct nstat_counts* stats = nstat_route_attach(rte);
if (stats) {
OSIncrementAtomic(&stats->nstat_connectsuccesses);
}
rte = rte->rt_parent;
}
}
__private_extern__ void
nstat_route_tx(
struct rtentry *rte,
u_int32_t packets,
u_int32_t bytes,
u_int32_t flags)
{
while (rte) {
struct nstat_counts* stats = nstat_route_attach(rte);
if (stats) {
if ((flags & NSTAT_TX_FLAG_RETRANSMIT) != 0) {
OSAddAtomic(bytes, &stats->nstat_txretransmit);
} else {
OSAddAtomic64((SInt64)packets, (SInt64*)&stats->nstat_txpackets);
OSAddAtomic64((SInt64)bytes, (SInt64*)&stats->nstat_txbytes);
}
}
rte = rte->rt_parent;
}
}
__private_extern__ void
nstat_route_rx(
struct rtentry *rte,
u_int32_t packets,
u_int32_t bytes,
u_int32_t flags)
{
while (rte) {
struct nstat_counts* stats = nstat_route_attach(rte);
if (stats) {
if (flags == 0) {
OSAddAtomic64((SInt64)packets, (SInt64*)&stats->nstat_rxpackets);
OSAddAtomic64((SInt64)bytes, (SInt64*)&stats->nstat_rxbytes);
} else {
if (flags & NSTAT_RX_FLAG_OUT_OF_ORDER) {
OSAddAtomic(bytes, &stats->nstat_rxoutoforderbytes);
}
if (flags & NSTAT_RX_FLAG_DUPLICATE) {
OSAddAtomic(bytes, &stats->nstat_rxduplicatebytes);
}
}
}
rte = rte->rt_parent;
}
}
/* atomically average current value at _val_addr with _new_val and store */
#define NSTAT_EWMA_ATOMIC(_val_addr, _new_val, _decay) do { \
volatile uint32_t _old_val; \
volatile uint32_t _avg; \
do { \
_old_val = *_val_addr; \
if (_old_val == 0) \
{ \
_avg = _new_val; \
} \
else \
{ \
_avg = _old_val - (_old_val >> _decay) + (_new_val >> _decay); \
} \
if (_old_val == _avg) break; \
} while (!OSCompareAndSwap(_old_val, _avg, _val_addr)); \
} while (0);
/* atomically compute minimum of current value at _val_addr with _new_val and store */
#define NSTAT_MIN_ATOMIC(_val_addr, _new_val) do { \
volatile uint32_t _old_val; \
do { \
_old_val = *_val_addr; \
if (_old_val != 0 && _old_val < _new_val) \
{ \
break; \
} \
} while (!OSCompareAndSwap(_old_val, _new_val, _val_addr)); \
} while (0);
__private_extern__ void
nstat_route_rtt(
struct rtentry *rte,
u_int32_t rtt,
u_int32_t rtt_var)
{
const uint32_t decay = 3;
while (rte) {
struct nstat_counts* stats = nstat_route_attach(rte);
if (stats) {
NSTAT_EWMA_ATOMIC(&stats->nstat_avg_rtt, rtt, decay);
NSTAT_MIN_ATOMIC(&stats->nstat_min_rtt, rtt);
NSTAT_EWMA_ATOMIC(&stats->nstat_var_rtt, rtt_var, decay);
}
rte = rte->rt_parent;
}
}
__private_extern__ void
nstat_route_update(
struct rtentry *rte,
uint32_t connect_attempts,
uint32_t connect_successes,
uint32_t rx_packets,
uint32_t rx_bytes,
uint32_t rx_duplicatebytes,
uint32_t rx_outoforderbytes,
uint32_t tx_packets,
uint32_t tx_bytes,
uint32_t tx_retransmit,
uint32_t rtt,
uint32_t rtt_var)
{
const uint32_t decay = 3;
while (rte) {
struct nstat_counts* stats = nstat_route_attach(rte);
if (stats) {
OSAddAtomic(connect_attempts, &stats->nstat_connectattempts);
OSAddAtomic(connect_successes, &stats->nstat_connectsuccesses);
OSAddAtomic64((SInt64)tx_packets, (SInt64*)&stats->nstat_txpackets);
OSAddAtomic64((SInt64)tx_bytes, (SInt64*)&stats->nstat_txbytes);
OSAddAtomic(tx_retransmit, &stats->nstat_txretransmit);
OSAddAtomic64((SInt64)rx_packets, (SInt64*)&stats->nstat_rxpackets);
OSAddAtomic64((SInt64)rx_bytes, (SInt64*)&stats->nstat_rxbytes);
OSAddAtomic(rx_outoforderbytes, &stats->nstat_rxoutoforderbytes);
OSAddAtomic(rx_duplicatebytes, &stats->nstat_rxduplicatebytes);
if (rtt != 0) {
NSTAT_EWMA_ATOMIC(&stats->nstat_avg_rtt, rtt, decay);
NSTAT_MIN_ATOMIC(&stats->nstat_min_rtt, rtt);
NSTAT_EWMA_ATOMIC(&stats->nstat_var_rtt, rtt_var, decay);
}
}
rte = rte->rt_parent;
}
}
#pragma mark -- TCP Kernel Provider --
/*
* Due to the way the kernel deallocates a process (the process structure
* might be gone by the time we get the PCB detach notification),
* we need to cache the process name. Without this, proc_name() would
* return null and the process name would never be sent to userland.
*
* For UDP sockets, we also store the cached the connection tuples along with
* the interface index. This is necessary because when UDP sockets are
* disconnected, the connection tuples are forever lost from the inpcb, thus
* we need to keep track of the last call to connect() in ntstat.
*/
struct nstat_tucookie {
struct inpcb *inp;
char pname[MAXCOMLEN + 1];
bool cached;
union{
struct sockaddr_in v4;
struct sockaddr_in6 v6;
} local;
union{
struct sockaddr_in v4;
struct sockaddr_in6 v6;
} remote;
unsigned int if_index;
uint16_t ifnet_properties;
};
static struct nstat_tucookie *
nstat_tucookie_alloc_internal(
struct inpcb *inp,
bool ref,
bool locked)
{
struct nstat_tucookie *cookie;
cookie = kheap_alloc(KHEAP_NET_STAT, sizeof(*cookie), Z_WAITOK);
if (cookie == NULL) {
return NULL;
}
if (!locked) {
LCK_MTX_ASSERT(&nstat_mtx, LCK_MTX_ASSERT_NOTOWNED);
}
if (ref && in_pcb_checkstate(inp, WNT_ACQUIRE, locked) == WNT_STOPUSING) {
kheap_free(KHEAP_NET_STAT, cookie, sizeof(*cookie));
return NULL;
}
bzero(cookie, sizeof(*cookie));
cookie->inp = inp;
proc_name(inp->inp_socket->last_pid, cookie->pname,
sizeof(cookie->pname));
/*
* We only increment the reference count for UDP sockets because we
* only cache UDP socket tuples.
*/
if (SOCK_PROTO(inp->inp_socket) == IPPROTO_UDP) {
OSIncrementAtomic(&inp->inp_nstat_refcnt);
}
return cookie;
}
static struct nstat_tucookie *
nstat_tucookie_alloc(
struct inpcb *inp)
{
return nstat_tucookie_alloc_internal(inp, false, false);
}
static struct nstat_tucookie *
nstat_tucookie_alloc_ref(
struct inpcb *inp)
{
return nstat_tucookie_alloc_internal(inp, true, false);
}
static struct nstat_tucookie *
nstat_tucookie_alloc_ref_locked(
struct inpcb *inp)
{
return nstat_tucookie_alloc_internal(inp, true, true);
}
static void
nstat_tucookie_release_internal(
struct nstat_tucookie *cookie,
int inplock)
{
if (SOCK_PROTO(cookie->inp->inp_socket) == IPPROTO_UDP) {
OSDecrementAtomic(&cookie->inp->inp_nstat_refcnt);
}
in_pcb_checkstate(cookie->inp, WNT_RELEASE, inplock);
kheap_free(KHEAP_NET_STAT, cookie, sizeof(*cookie));
}
static void
nstat_tucookie_release(
struct nstat_tucookie *cookie)
{
nstat_tucookie_release_internal(cookie, false);
}
static void
nstat_tucookie_release_locked(
struct nstat_tucookie *cookie)
{
nstat_tucookie_release_internal(cookie, true);
}
static nstat_provider nstat_tcp_provider;
static errno_t
nstat_tcpudp_lookup(
struct inpcbinfo *inpinfo,
const void *data,
u_int32_t length,
nstat_provider_cookie_t *out_cookie)
{
struct inpcb *inp = NULL;
// parameter validation
const nstat_tcp_add_param *param = (const nstat_tcp_add_param*)data;
if (length < sizeof(*param)) {
return EINVAL;
}
// src and dst must match
if (param->remote.v4.sin_family != 0 &&
param->remote.v4.sin_family != param->local.v4.sin_family) {
return EINVAL;
}
switch (param->local.v4.sin_family) {
case AF_INET:
{
if (param->local.v4.sin_len != sizeof(param->local.v4) ||
(param->remote.v4.sin_family != 0 &&
param->remote.v4.sin_len != sizeof(param->remote.v4))) {
return EINVAL;
}
inp = in_pcblookup_hash(inpinfo, param->remote.v4.sin_addr, param->remote.v4.sin_port,
param->local.v4.sin_addr, param->local.v4.sin_port, 1, NULL);
}
break;
case AF_INET6:
{
union{
const struct in6_addr *in6c;
struct in6_addr *in6;
} local, remote;
if (param->local.v6.sin6_len != sizeof(param->local.v6) ||
(param->remote.v6.sin6_family != 0 &&
param->remote.v6.sin6_len != sizeof(param->remote.v6))) {
return EINVAL;
}
local.in6c = &param->local.v6.sin6_addr;
remote.in6c = &param->remote.v6.sin6_addr;
inp = in6_pcblookup_hash(inpinfo, remote.in6, param->remote.v6.sin6_port,
local.in6, param->local.v6.sin6_port, 1, NULL);
}
break;
default:
return EINVAL;
}
if (inp == NULL) {
return ENOENT;
}
// At this point we have a ref to the inpcb
*out_cookie = nstat_tucookie_alloc(inp);
if (*out_cookie == NULL) {
in_pcb_checkstate(inp, WNT_RELEASE, 0);
}
return 0;
}
static errno_t
nstat_tcp_lookup(
const void *data,
u_int32_t length,
nstat_provider_cookie_t *out_cookie)
{
return nstat_tcpudp_lookup(&tcbinfo, data, length, out_cookie);
}
static int
nstat_tcp_gone(
nstat_provider_cookie_t cookie)
{
struct nstat_tucookie *tucookie =
(struct nstat_tucookie *)cookie;
struct inpcb *inp;
struct tcpcb *tp;
return (!(inp = tucookie->inp) ||
!(tp = intotcpcb(inp)) ||
inp->inp_state == INPCB_STATE_DEAD) ? 1 : 0;
}
static errno_t
nstat_tcp_counts(
nstat_provider_cookie_t cookie,
struct nstat_counts *out_counts,
int *out_gone)
{
struct nstat_tucookie *tucookie =
(struct nstat_tucookie *)cookie;
struct inpcb *inp;
bzero(out_counts, sizeof(*out_counts));
if (out_gone) {
*out_gone = 0;
}
// if the pcb is in the dead state, we should stop using it
if (nstat_tcp_gone(cookie)) {
if (out_gone) {
*out_gone = 1;
}
if (!(inp = tucookie->inp) || !intotcpcb(inp)) {
return EINVAL;
}
}
inp = tucookie->inp;
struct tcpcb *tp = intotcpcb(inp);
atomic_get_64(out_counts->nstat_rxpackets, &inp->inp_stat->rxpackets);
atomic_get_64(out_counts->nstat_rxbytes, &inp->inp_stat->rxbytes);
atomic_get_64(out_counts->nstat_txpackets, &inp->inp_stat->txpackets);
atomic_get_64(out_counts->nstat_txbytes, &inp->inp_stat->txbytes);
out_counts->nstat_rxduplicatebytes = tp->t_stat.rxduplicatebytes;
out_counts->nstat_rxoutoforderbytes = tp->t_stat.rxoutoforderbytes;
out_counts->nstat_txretransmit = tp->t_stat.txretransmitbytes;
out_counts->nstat_connectattempts = tp->t_state >= TCPS_SYN_SENT ? 1 : 0;
out_counts->nstat_connectsuccesses = tp->t_state >= TCPS_ESTABLISHED ? 1 : 0;
out_counts->nstat_avg_rtt = tp->t_srtt;
out_counts->nstat_min_rtt = tp->t_rttbest;
out_counts->nstat_var_rtt = tp->t_rttvar;
if (out_counts->nstat_avg_rtt < out_counts->nstat_min_rtt) {
out_counts->nstat_min_rtt = out_counts->nstat_avg_rtt;
}
atomic_get_64(out_counts->nstat_cell_rxbytes, &inp->inp_cstat->rxbytes);
atomic_get_64(out_counts->nstat_cell_txbytes, &inp->inp_cstat->txbytes);
atomic_get_64(out_counts->nstat_wifi_rxbytes, &inp->inp_wstat->rxbytes);
atomic_get_64(out_counts->nstat_wifi_txbytes, &inp->inp_wstat->txbytes);
atomic_get_64(out_counts->nstat_wired_rxbytes, &inp->inp_Wstat->rxbytes);
atomic_get_64(out_counts->nstat_wired_txbytes, &inp->inp_Wstat->txbytes);
return 0;
}
static void
nstat_tcp_release(
nstat_provider_cookie_t cookie,
int locked)
{
struct nstat_tucookie *tucookie =
(struct nstat_tucookie *)cookie;
nstat_tucookie_release_internal(tucookie, locked);
}
static errno_t
nstat_tcp_add_watcher(
nstat_control_state *state,
nstat_msg_add_all_srcs *req)
{
// There is a tricky issue around getting all TCP sockets added once
// and only once. nstat_tcp_new_pcb() is called prior to the new item
// being placed on any lists where it might be found.
// By locking the tcbinfo.ipi_lock prior to marking the state as a watcher,
// it should be impossible for a new socket to be added twice.
// On the other hand, there is still a timing issue where a new socket
// results in a call to nstat_tcp_new_pcb() before this watcher
// is instantiated and yet the socket doesn't make it into ipi_listhead
// prior to the scan. <rdar://problem/30361716>
errno_t result;
lck_rw_lock_shared(tcbinfo.ipi_lock);
result = nstat_set_provider_filter(state, req);
if (result == 0) {
OSIncrementAtomic(&nstat_tcp_watchers);
// Add all current tcp inpcbs. Ignore those in timewait
struct inpcb *inp;
struct nstat_tucookie *cookie;
LIST_FOREACH(inp, tcbinfo.ipi_listhead, inp_list)
{
cookie = nstat_tucookie_alloc_ref(inp);
if (cookie == NULL) {
continue;
}
if (nstat_control_source_add(0, state, &nstat_tcp_provider,
cookie) != 0) {
nstat_tucookie_release(cookie);
break;
}
}
}
lck_rw_done(tcbinfo.ipi_lock);
return result;
}
static void
nstat_tcp_remove_watcher(
__unused nstat_control_state *state)
{
OSDecrementAtomic(&nstat_tcp_watchers);
}
__private_extern__ void
nstat_tcp_new_pcb(
struct inpcb *inp)
{
struct nstat_tucookie *cookie;
inp->inp_start_timestamp = mach_continuous_time();
if (nstat_tcp_watchers == 0) {
return;
}
socket_lock(inp->inp_socket, 0);
lck_mtx_lock(&nstat_mtx);
nstat_control_state *state;
for (state = nstat_controls; state; state = state->ncs_next) {
if ((state->ncs_watching & (1 << NSTAT_PROVIDER_TCP_KERNEL)) != 0) {
// this client is watching tcp
// acquire a reference for it
cookie = nstat_tucookie_alloc_ref_locked(inp);
if (cookie == NULL) {
continue;
}
// add the source, if that fails, release the reference
if (nstat_control_source_add(0, state,
&nstat_tcp_provider, cookie) != 0) {
nstat_tucookie_release_locked(cookie);
break;
}
}
}
lck_mtx_unlock(&nstat_mtx);
socket_unlock(inp->inp_socket, 0);
}
__private_extern__ void
nstat_pcb_detach(struct inpcb *inp)
{
nstat_control_state *state;
nstat_src *src;
tailq_head_nstat_src dead_list;
struct nstat_tucookie *tucookie;
errno_t result;
if (inp == NULL || (nstat_tcp_watchers == 0 && nstat_udp_watchers == 0)) {
return;
}
TAILQ_INIT(&dead_list);
lck_mtx_lock(&nstat_mtx);
for (state = nstat_controls; state; state = state->ncs_next) {
lck_mtx_lock(&state->ncs_mtx);
TAILQ_FOREACH(src, &state->ncs_src_queue, ns_control_link)
{
nstat_provider_id_t provider_id = src->provider->nstat_provider_id;
if (provider_id == NSTAT_PROVIDER_TCP_KERNEL || provider_id == NSTAT_PROVIDER_UDP_KERNEL) {
tucookie = (struct nstat_tucookie *)src->cookie;
if (tucookie->inp == inp) {
break;
}
}
}
if (src) {
result = nstat_control_send_goodbye(state, src);
TAILQ_REMOVE(&state->ncs_src_queue, src, ns_control_link);
TAILQ_INSERT_TAIL(&dead_list, src, ns_control_link);
}
lck_mtx_unlock(&state->ncs_mtx);
}
lck_mtx_unlock(&nstat_mtx);
while ((src = TAILQ_FIRST(&dead_list))) {
TAILQ_REMOVE(&dead_list, src, ns_control_link);
nstat_control_cleanup_source(NULL, src, TRUE);
}
}
__private_extern__ void
nstat_pcb_event(struct inpcb *inp, u_int64_t event)
{
nstat_control_state *state;
nstat_src *src;
struct nstat_tucookie *tucookie;
errno_t result;
nstat_provider_id_t provider_id;
if (inp == NULL || (nstat_tcp_watchers == 0 && nstat_udp_watchers == 0)) {
return;
}
lck_mtx_lock(&nstat_mtx);
for (state = nstat_controls; state; state = state->ncs_next) {
if (((state->ncs_provider_filters[NSTAT_PROVIDER_TCP_KERNEL].npf_events & event) == 0) &&
((state->ncs_provider_filters[NSTAT_PROVIDER_UDP_KERNEL].npf_events & event) == 0)) {
continue;
}
lck_mtx_lock(&state->ncs_mtx);
TAILQ_FOREACH(src, &state->ncs_src_queue, ns_control_link)
{
provider_id = src->provider->nstat_provider_id;
if (provider_id == NSTAT_PROVIDER_TCP_KERNEL || provider_id == NSTAT_PROVIDER_UDP_KERNEL) {
tucookie = (struct nstat_tucookie *)src->cookie;
if (tucookie->inp == inp) {
break;
}
}
}
if (src && ((state->ncs_provider_filters[provider_id].npf_events & event) != 0)) {
result = nstat_control_send_event(state, src, event);
}
lck_mtx_unlock(&state->ncs_mtx);
}
lck_mtx_unlock(&nstat_mtx);
}
__private_extern__ void
nstat_pcb_cache(struct inpcb *inp)
{
nstat_control_state *state;
nstat_src *src;
struct nstat_tucookie *tucookie;
if (inp == NULL || nstat_udp_watchers == 0 ||
inp->inp_nstat_refcnt == 0) {
return;
}
VERIFY(SOCK_PROTO(inp->inp_socket) == IPPROTO_UDP);
lck_mtx_lock(&nstat_mtx);
for (state = nstat_controls; state; state = state->ncs_next) {
lck_mtx_lock(&state->ncs_mtx);
TAILQ_FOREACH(src, &state->ncs_src_queue, ns_control_link)
{
tucookie = (struct nstat_tucookie *)src->cookie;
if (tucookie->inp == inp) {
if (inp->inp_vflag & INP_IPV6) {
in6_ip6_to_sockaddr(&inp->in6p_laddr,
inp->inp_lport,
&tucookie->local.v6,
sizeof(tucookie->local));
in6_ip6_to_sockaddr(&inp->in6p_faddr,
inp->inp_fport,
&tucookie->remote.v6,
sizeof(tucookie->remote));
} else if (inp->inp_vflag & INP_IPV4) {
nstat_ip_to_sockaddr(&inp->inp_laddr,
inp->inp_lport,
&tucookie->local.v4,
sizeof(tucookie->local));
nstat_ip_to_sockaddr(&inp->inp_faddr,
inp->inp_fport,
&tucookie->remote.v4,
sizeof(tucookie->remote));
}
if (inp->inp_last_outifp) {
tucookie->if_index =
inp->inp_last_outifp->if_index;
}
tucookie->ifnet_properties = nstat_inpcb_to_flags(inp);
tucookie->cached = true;
break;
}
}
lck_mtx_unlock(&state->ncs_mtx);
}
lck_mtx_unlock(&nstat_mtx);
}
__private_extern__ void
nstat_pcb_invalidate_cache(struct inpcb *inp)
{
nstat_control_state *state;
nstat_src *src;
struct nstat_tucookie *tucookie;
if (inp == NULL || nstat_udp_watchers == 0 ||
inp->inp_nstat_refcnt == 0) {
return;
}
VERIFY(SOCK_PROTO(inp->inp_socket) == IPPROTO_UDP);
lck_mtx_lock(&nstat_mtx);
for (state = nstat_controls; state; state = state->ncs_next) {
lck_mtx_lock(&state->ncs_mtx);
TAILQ_FOREACH(src, &state->ncs_src_queue, ns_control_link)
{
tucookie = (struct nstat_tucookie *)src->cookie;
if (tucookie->inp == inp) {
tucookie->cached = false;
break;
}
}
lck_mtx_unlock(&state->ncs_mtx);
}
lck_mtx_unlock(&nstat_mtx);
}
static errno_t
nstat_tcp_copy_descriptor(
nstat_provider_cookie_t cookie,
void *data,
size_t len)
{
if (len < sizeof(nstat_tcp_descriptor)) {
return EINVAL;
}
if (nstat_tcp_gone(cookie)) {
return EINVAL;
}
nstat_tcp_descriptor *desc = (nstat_tcp_descriptor*)data;
struct nstat_tucookie *tucookie =
(struct nstat_tucookie *)cookie;
struct inpcb *inp = tucookie->inp;
struct tcpcb *tp = intotcpcb(inp);
bzero(desc, sizeof(*desc));
if (inp->inp_vflag & INP_IPV6) {
in6_ip6_to_sockaddr(&inp->in6p_laddr, inp->inp_lport,
&desc->local.v6, sizeof(desc->local));
in6_ip6_to_sockaddr(&inp->in6p_faddr, inp->inp_fport,
&desc->remote.v6, sizeof(desc->remote));
} else if (inp->inp_vflag & INP_IPV4) {
nstat_ip_to_sockaddr(&inp->inp_laddr, inp->inp_lport,
&desc->local.v4, sizeof(desc->local));
nstat_ip_to_sockaddr(&inp->inp_faddr, inp->inp_fport,
&desc->remote.v4, sizeof(desc->remote));
}
desc->state = intotcpcb(inp)->t_state;
desc->ifindex = (inp->inp_last_outifp == NULL) ? 0 :
inp->inp_last_outifp->if_index;
// danger - not locked, values could be bogus
desc->txunacked = tp->snd_max - tp->snd_una;
desc->txwindow = tp->snd_wnd;
desc->txcwindow = tp->snd_cwnd;
if (CC_ALGO(tp)->name != NULL) {
strlcpy(desc->cc_algo, CC_ALGO(tp)->name,
sizeof(desc->cc_algo));
}
struct socket *so = inp->inp_socket;
if (so) {
// TBD - take the socket lock around these to make sure
// they're in sync?
desc->upid = so->last_upid;
desc->pid = so->last_pid;
desc->traffic_class = so->so_traffic_class;
if ((so->so_flags1 & SOF1_TRAFFIC_MGT_SO_BACKGROUND)) {
desc->traffic_mgt_flags |= TRAFFIC_MGT_SO_BACKGROUND;
}
if ((so->so_flags1 & SOF1_TRAFFIC_MGT_TCP_RECVBG)) {
desc->traffic_mgt_flags |= TRAFFIC_MGT_TCP_RECVBG;
}
proc_name(desc->pid, desc->pname, sizeof(desc->pname));
if (desc->pname[0] == 0) {
strlcpy(desc->pname, tucookie->pname,
sizeof(desc->pname));
} else {
desc->pname[sizeof(desc->pname) - 1] = 0;
strlcpy(tucookie->pname, desc->pname,
sizeof(tucookie->pname));
}
memcpy(desc->uuid, so->last_uuid, sizeof(so->last_uuid));
memcpy(desc->vuuid, so->so_vuuid, sizeof(so->so_vuuid));
if (so->so_flags & SOF_DELEGATED) {
desc->eupid = so->e_upid;
desc->epid = so->e_pid;
memcpy(desc->euuid, so->e_uuid, sizeof(so->e_uuid));
} else {
desc->eupid = desc->upid;
desc->epid = desc->pid;
memcpy(desc->euuid, desc->uuid, sizeof(desc->uuid));
}
uuid_copy(desc->fuuid, inp->necp_client_uuid);
desc->sndbufsize = so->so_snd.sb_hiwat;
desc->sndbufused = so->so_snd.sb_cc;
desc->rcvbufsize = so->so_rcv.sb_hiwat;
desc->rcvbufused = so->so_rcv.sb_cc;
}
tcp_get_connectivity_status(tp, &desc->connstatus);
desc->ifnet_properties = nstat_inpcb_to_flags(inp);
inp_get_activity_bitmap(inp, &desc->activity_bitmap);
desc->start_timestamp = inp->inp_start_timestamp;
desc->timestamp = mach_continuous_time();
return 0;
}
static bool
nstat_tcpudp_reporting_allowed(nstat_provider_cookie_t cookie, nstat_provider_filter *filter, bool is_UDP)
{
bool retval = true;
if ((filter->npf_flags & (NSTAT_FILTER_IFNET_FLAGS | NSTAT_FILTER_SPECIFIC_USER)) != 0) {
struct nstat_tucookie *tucookie = (struct nstat_tucookie *)cookie;
struct inpcb *inp = tucookie->inp;
/* Only apply interface filter if at least one is allowed. */
if ((filter->npf_flags & NSTAT_FILTER_IFNET_FLAGS) != 0) {
uint16_t interface_properties = nstat_inpcb_to_flags(inp);
if ((filter->npf_flags & interface_properties) == 0) {
// For UDP, we could have an undefined interface and yet transfers may have occurred.
// We allow reporting if there have been transfers of the requested kind.
// This is imperfect as we cannot account for the expensive attribute over wifi.
// We also assume that cellular is expensive and we have no way to select for AWDL
if (is_UDP) {
do{
if ((filter->npf_flags & (NSTAT_FILTER_ACCEPT_CELLULAR | NSTAT_FILTER_ACCEPT_EXPENSIVE)) &&
(inp->inp_cstat->rxbytes || inp->inp_cstat->txbytes)) {
break;
}
if ((filter->npf_flags & NSTAT_FILTER_ACCEPT_WIFI) &&
(inp->inp_wstat->rxbytes || inp->inp_wstat->txbytes)) {
break;
}
if ((filter->npf_flags & NSTAT_FILTER_ACCEPT_WIRED) &&
(inp->inp_Wstat->rxbytes || inp->inp_Wstat->txbytes)) {
break;
}
return false;
} while (0);
} else {
return false;
}
}
}
if (((filter->npf_flags & NSTAT_FILTER_SPECIFIC_USER) != 0) && (retval)) {
struct socket *so = inp->inp_socket;
retval = false;
if (so) {
if (((filter->npf_flags & NSTAT_FILTER_SPECIFIC_USER_BY_PID) != 0) &&
(filter->npf_pid == so->last_pid)) {
retval = true;
} else if (((filter->npf_flags & NSTAT_FILTER_SPECIFIC_USER_BY_EPID) != 0) &&
(filter->npf_pid == (so->so_flags & SOF_DELEGATED)? so->e_upid : so->last_pid)) {
retval = true;
} else if (((filter->npf_flags & NSTAT_FILTER_SPECIFIC_USER_BY_UUID) != 0) &&
(memcmp(filter->npf_uuid, so->last_uuid, sizeof(so->last_uuid)) == 0)) {
retval = true;
} else if (((filter->npf_flags & NSTAT_FILTER_SPECIFIC_USER_BY_EUUID) != 0) &&
(memcmp(filter->npf_uuid, (so->so_flags & SOF_DELEGATED)? so->e_uuid : so->last_uuid,
sizeof(so->last_uuid)) == 0)) {
retval = true;
}
}
}
}
return retval;
}
static bool
nstat_tcp_reporting_allowed(nstat_provider_cookie_t cookie, nstat_provider_filter *filter)
{
return nstat_tcpudp_reporting_allowed(cookie, filter, FALSE);
}
static void
nstat_init_tcp_provider(void)
{
bzero(&nstat_tcp_provider, sizeof(nstat_tcp_provider));
nstat_tcp_provider.nstat_descriptor_length = sizeof(nstat_tcp_descriptor);
nstat_tcp_provider.nstat_provider_id = NSTAT_PROVIDER_TCP_KERNEL;
nstat_tcp_provider.nstat_lookup = nstat_tcp_lookup;
nstat_tcp_provider.nstat_gone = nstat_tcp_gone;
nstat_tcp_provider.nstat_counts = nstat_tcp_counts;
nstat_tcp_provider.nstat_release = nstat_tcp_release;
nstat_tcp_provider.nstat_watcher_add = nstat_tcp_add_watcher;
nstat_tcp_provider.nstat_watcher_remove = nstat_tcp_remove_watcher;
nstat_tcp_provider.nstat_copy_descriptor = nstat_tcp_copy_descriptor;
nstat_tcp_provider.nstat_reporting_allowed = nstat_tcp_reporting_allowed;
nstat_tcp_provider.next = nstat_providers;
nstat_providers = &nstat_tcp_provider;
}
#pragma mark -- UDP Provider --
static nstat_provider nstat_udp_provider;
static errno_t
nstat_udp_lookup(
const void *data,
u_int32_t length,
nstat_provider_cookie_t *out_cookie)
{
return nstat_tcpudp_lookup(&udbinfo, data, length, out_cookie);
}
static int
nstat_udp_gone(
nstat_provider_cookie_t cookie)
{
struct nstat_tucookie *tucookie =
(struct nstat_tucookie *)cookie;
struct inpcb *inp;
return (!(inp = tucookie->inp) ||
inp->inp_state == INPCB_STATE_DEAD) ? 1 : 0;
}
static errno_t
nstat_udp_counts(
nstat_provider_cookie_t cookie,
struct nstat_counts *out_counts,
int *out_gone)
{
struct nstat_tucookie *tucookie =
(struct nstat_tucookie *)cookie;
if (out_gone) {
*out_gone = 0;
}
// if the pcb is in the dead state, we should stop using it
if (nstat_udp_gone(cookie)) {
if (out_gone) {
*out_gone = 1;
}
if (!tucookie->inp) {
return EINVAL;
}
}
struct inpcb *inp = tucookie->inp;
atomic_get_64(out_counts->nstat_rxpackets, &inp->inp_stat->rxpackets);
atomic_get_64(out_counts->nstat_rxbytes, &inp->inp_stat->rxbytes);
atomic_get_64(out_counts->nstat_txpackets, &inp->inp_stat->txpackets);
atomic_get_64(out_counts->nstat_txbytes, &inp->inp_stat->txbytes);
atomic_get_64(out_counts->nstat_cell_rxbytes, &inp->inp_cstat->rxbytes);
atomic_get_64(out_counts->nstat_cell_txbytes, &inp->inp_cstat->txbytes);
atomic_get_64(out_counts->nstat_wifi_rxbytes, &inp->inp_wstat->rxbytes);
atomic_get_64(out_counts->nstat_wifi_txbytes, &inp->inp_wstat->txbytes);
atomic_get_64(out_counts->nstat_wired_rxbytes, &inp->inp_Wstat->rxbytes);
atomic_get_64(out_counts->nstat_wired_txbytes, &inp->inp_Wstat->txbytes);
return 0;
}
static void
nstat_udp_release(
nstat_provider_cookie_t cookie,
int locked)
{
struct nstat_tucookie *tucookie =
(struct nstat_tucookie *)cookie;
nstat_tucookie_release_internal(tucookie, locked);
}
static errno_t
nstat_udp_add_watcher(
nstat_control_state *state,
nstat_msg_add_all_srcs *req)
{
// There is a tricky issue around getting all UDP sockets added once
// and only once. nstat_udp_new_pcb() is called prior to the new item
// being placed on any lists where it might be found.
// By locking the udpinfo.ipi_lock prior to marking the state as a watcher,
// it should be impossible for a new socket to be added twice.
// On the other hand, there is still a timing issue where a new socket
// results in a call to nstat_udp_new_pcb() before this watcher
// is instantiated and yet the socket doesn't make it into ipi_listhead
// prior to the scan. <rdar://problem/30361716>
errno_t result;
lck_rw_lock_shared(udbinfo.ipi_lock);
result = nstat_set_provider_filter(state, req);
if (result == 0) {
struct inpcb *inp;
struct nstat_tucookie *cookie;
OSIncrementAtomic(&nstat_udp_watchers);
// Add all current UDP inpcbs.
LIST_FOREACH(inp, udbinfo.ipi_listhead, inp_list)
{
cookie = nstat_tucookie_alloc_ref(inp);
if (cookie == NULL) {
continue;
}
if (nstat_control_source_add(0, state, &nstat_udp_provider,
cookie) != 0) {
nstat_tucookie_release(cookie);
break;
}
}
}
lck_rw_done(udbinfo.ipi_lock);
return result;
}
static void
nstat_udp_remove_watcher(
__unused nstat_control_state *state)
{
OSDecrementAtomic(&nstat_udp_watchers);
}
__private_extern__ void
nstat_udp_new_pcb(
struct inpcb *inp)
{
struct nstat_tucookie *cookie;
inp->inp_start_timestamp = mach_continuous_time();
if (nstat_udp_watchers == 0) {
return;
}
socket_lock(inp->inp_socket, 0);
lck_mtx_lock(&nstat_mtx);
nstat_control_state *state;
for (state = nstat_controls; state; state = state->ncs_next) {
if ((state->ncs_watching & (1 << NSTAT_PROVIDER_UDP_KERNEL)) != 0) {
// this client is watching tcp
// acquire a reference for it
cookie = nstat_tucookie_alloc_ref_locked(inp);
if (cookie == NULL) {
continue;
}
// add the source, if that fails, release the reference
if (nstat_control_source_add(0, state,
&nstat_udp_provider, cookie) != 0) {
nstat_tucookie_release_locked(cookie);
break;
}
}
}
lck_mtx_unlock(&nstat_mtx);
socket_unlock(inp->inp_socket, 0);
}
static errno_t
nstat_udp_copy_descriptor(
nstat_provider_cookie_t cookie,
void *data,
size_t len)
{
if (len < sizeof(nstat_udp_descriptor)) {
return EINVAL;
}
if (nstat_udp_gone(cookie)) {
return EINVAL;
}
struct nstat_tucookie *tucookie =
(struct nstat_tucookie *)cookie;
nstat_udp_descriptor *desc = (nstat_udp_descriptor*)data;
struct inpcb *inp = tucookie->inp;
bzero(desc, sizeof(*desc));
if (tucookie->cached == false) {
if (inp->inp_vflag & INP_IPV6) {
in6_ip6_to_sockaddr(&inp->in6p_laddr, inp->inp_lport,
&desc->local.v6, sizeof(desc->local.v6));
in6_ip6_to_sockaddr(&inp->in6p_faddr, inp->inp_fport,
&desc->remote.v6, sizeof(desc->remote.v6));
} else if (inp->inp_vflag & INP_IPV4) {
nstat_ip_to_sockaddr(&inp->inp_laddr, inp->inp_lport,
&desc->local.v4, sizeof(desc->local.v4));
nstat_ip_to_sockaddr(&inp->inp_faddr, inp->inp_fport,
&desc->remote.v4, sizeof(desc->remote.v4));
}
desc->ifnet_properties = nstat_inpcb_to_flags(inp);
} else {
if (inp->inp_vflag & INP_IPV6) {
memcpy(&desc->local.v6, &tucookie->local.v6,
sizeof(desc->local.v6));
memcpy(&desc->remote.v6, &tucookie->remote.v6,
sizeof(desc->remote.v6));
} else if (inp->inp_vflag & INP_IPV4) {
memcpy(&desc->local.v4, &tucookie->local.v4,
sizeof(desc->local.v4));
memcpy(&desc->remote.v4, &tucookie->remote.v4,
sizeof(desc->remote.v4));
}
desc->ifnet_properties = tucookie->ifnet_properties;
}
if (inp->inp_last_outifp) {
desc->ifindex = inp->inp_last_outifp->if_index;
} else {
desc->ifindex = tucookie->if_index;
}
struct socket *so = inp->inp_socket;
if (so) {
// TBD - take the socket lock around these to make sure
// they're in sync?
desc->upid = so->last_upid;
desc->pid = so->last_pid;
proc_name(desc->pid, desc->pname, sizeof(desc->pname));
if (desc->pname[0] == 0) {
strlcpy(desc->pname, tucookie->pname,
sizeof(desc->pname));
} else {
desc->pname[sizeof(desc->pname) - 1] = 0;
strlcpy(tucookie->pname, desc->pname,
sizeof(tucookie->pname));
}
memcpy(desc->uuid, so->last_uuid, sizeof(so->last_uuid));
memcpy(desc->vuuid, so->so_vuuid, sizeof(so->so_vuuid));
if (so->so_flags & SOF_DELEGATED) {
desc->eupid = so->e_upid;
desc->epid = so->e_pid;
memcpy(desc->euuid, so->e_uuid, sizeof(so->e_uuid));
} else {
desc->eupid = desc->upid;
desc->epid = desc->pid;
memcpy(desc->euuid, desc->uuid, sizeof(desc->uuid));
}
uuid_copy(desc->fuuid, inp->necp_client_uuid);
desc->rcvbufsize = so->so_rcv.sb_hiwat;
desc->rcvbufused = so->so_rcv.sb_cc;
desc->traffic_class = so->so_traffic_class;
inp_get_activity_bitmap(inp, &desc->activity_bitmap);
desc->start_timestamp = inp->inp_start_timestamp;
desc->timestamp = mach_continuous_time();
}
return 0;
}
static bool
nstat_udp_reporting_allowed(nstat_provider_cookie_t cookie, nstat_provider_filter *filter)
{
return nstat_tcpudp_reporting_allowed(cookie, filter, TRUE);
}
static void
nstat_init_udp_provider(void)
{
bzero(&nstat_udp_provider, sizeof(nstat_udp_provider));
nstat_udp_provider.nstat_provider_id = NSTAT_PROVIDER_UDP_KERNEL;
nstat_udp_provider.nstat_descriptor_length = sizeof(nstat_udp_descriptor);
nstat_udp_provider.nstat_lookup = nstat_udp_lookup;
nstat_udp_provider.nstat_gone = nstat_udp_gone;
nstat_udp_provider.nstat_counts = nstat_udp_counts;
nstat_udp_provider.nstat_watcher_add = nstat_udp_add_watcher;
nstat_udp_provider.nstat_watcher_remove = nstat_udp_remove_watcher;
nstat_udp_provider.nstat_copy_descriptor = nstat_udp_copy_descriptor;
nstat_udp_provider.nstat_release = nstat_udp_release;
nstat_udp_provider.nstat_reporting_allowed = nstat_udp_reporting_allowed;
nstat_udp_provider.next = nstat_providers;
nstat_providers = &nstat_udp_provider;
}
#pragma mark -- ifnet Provider --
static nstat_provider nstat_ifnet_provider;
/*
* We store a pointer to the ifnet and the original threshold
* requested by the client.
*/
struct nstat_ifnet_cookie {
struct ifnet *ifp;
uint64_t threshold;
};
static errno_t
nstat_ifnet_lookup(
const void *data,
u_int32_t length,
nstat_provider_cookie_t *out_cookie)
{
const nstat_ifnet_add_param *param = (const nstat_ifnet_add_param *)data;
struct ifnet *ifp;
boolean_t changed = FALSE;
nstat_control_state *state;
nstat_src *src;
struct nstat_ifnet_cookie *cookie;
if (length < sizeof(*param) || param->threshold < 1024 * 1024) {
return EINVAL;
}
if (nstat_privcheck != 0) {
errno_t result = priv_check_cred(kauth_cred_get(),
PRIV_NET_PRIVILEGED_NETWORK_STATISTICS, 0);
if (result != 0) {
return result;
}
}
cookie = kheap_alloc(KHEAP_NET_STAT, sizeof(*cookie), Z_WAITOK | Z_ZERO);
if (cookie == NULL) {
return ENOMEM;
}
ifnet_head_lock_shared();
TAILQ_FOREACH(ifp, &ifnet_head, if_link)
{
ifnet_lock_exclusive(ifp);
if (ifp->if_index == param->ifindex) {
cookie->ifp = ifp;
cookie->threshold = param->threshold;
*out_cookie = cookie;
if (!ifp->if_data_threshold ||
ifp->if_data_threshold > param->threshold) {
changed = TRUE;
ifp->if_data_threshold = param->threshold;
}
ifnet_lock_done(ifp);
ifnet_reference(ifp);
break;
}
ifnet_lock_done(ifp);
}
ifnet_head_done();
/*
* When we change the threshold to something smaller, we notify
* all of our clients with a description message.
* We won't send a message to the client we are currently serving
* because it has no `ifnet source' yet.
*/
if (changed) {
lck_mtx_lock(&nstat_mtx);
for (state = nstat_controls; state; state = state->ncs_next) {
lck_mtx_lock(&state->ncs_mtx);
TAILQ_FOREACH(src, &state->ncs_src_queue, ns_control_link)
{
if (src->provider != &nstat_ifnet_provider) {
continue;
}
nstat_control_send_description(state, src, 0, 0);
}
lck_mtx_unlock(&state->ncs_mtx);
}
lck_mtx_unlock(&nstat_mtx);
}
if (cookie->ifp == NULL) {
kheap_free(KHEAP_NET_STAT, cookie, sizeof(*cookie));
}
return ifp ? 0 : EINVAL;
}
static int
nstat_ifnet_gone(
nstat_provider_cookie_t cookie)
{
struct ifnet *ifp;
struct nstat_ifnet_cookie *ifcookie =
(struct nstat_ifnet_cookie *)cookie;
ifnet_head_lock_shared();
TAILQ_FOREACH(ifp, &ifnet_head, if_link)
{
if (ifp == ifcookie->ifp) {
break;
}
}
ifnet_head_done();
return ifp ? 0 : 1;
}
static errno_t
nstat_ifnet_counts(
nstat_provider_cookie_t cookie,
struct nstat_counts *out_counts,
int *out_gone)
{
struct nstat_ifnet_cookie *ifcookie =
(struct nstat_ifnet_cookie *)cookie;
struct ifnet *ifp = ifcookie->ifp;
if (out_gone) {
*out_gone = 0;
}
// if the ifnet is gone, we should stop using it
if (nstat_ifnet_gone(cookie)) {
if (out_gone) {
*out_gone = 1;
}
return EINVAL;
}
bzero(out_counts, sizeof(*out_counts));
out_counts->nstat_rxpackets = ifp->if_ipackets;
out_counts->nstat_rxbytes = ifp->if_ibytes;
out_counts->nstat_txpackets = ifp->if_opackets;
out_counts->nstat_txbytes = ifp->if_obytes;
out_counts->nstat_cell_rxbytes = out_counts->nstat_cell_txbytes = 0;
return 0;
}
static void
nstat_ifnet_release(
nstat_provider_cookie_t cookie,
__unused int locked)
{
struct nstat_ifnet_cookie *ifcookie;
struct ifnet *ifp;
nstat_control_state *state;
nstat_src *src;
uint64_t minthreshold = UINT64_MAX;
/*
* Find all the clients that requested a threshold
* for this ifnet and re-calculate if_data_threshold.
*/
lck_mtx_lock(&nstat_mtx);
for (state = nstat_controls; state; state = state->ncs_next) {
lck_mtx_lock(&state->ncs_mtx);
TAILQ_FOREACH(src, &state->ncs_src_queue, ns_control_link)
{
/* Skip the provider we are about to detach. */
if (src->provider != &nstat_ifnet_provider ||
src->cookie == cookie) {
continue;
}
ifcookie = (struct nstat_ifnet_cookie *)src->cookie;
if (ifcookie->threshold < minthreshold) {
minthreshold = ifcookie->threshold;
}
}
lck_mtx_unlock(&state->ncs_mtx);
}
lck_mtx_unlock(&nstat_mtx);
/*
* Reset if_data_threshold or disable it.
*/
ifcookie = (struct nstat_ifnet_cookie *)cookie;
ifp = ifcookie->ifp;
if (ifnet_is_attached(ifp, 1)) {
ifnet_lock_exclusive(ifp);
if (minthreshold == UINT64_MAX) {
ifp->if_data_threshold = 0;
} else {
ifp->if_data_threshold = minthreshold;
}
ifnet_lock_done(ifp);
ifnet_decr_iorefcnt(ifp);
}
ifnet_release(ifp);
kheap_free(KHEAP_NET_STAT, ifcookie, sizeof(*ifcookie));
}
static void
nstat_ifnet_copy_link_status(
struct ifnet *ifp,
struct nstat_ifnet_descriptor *desc)
{
struct if_link_status *ifsr = ifp->if_link_status;
nstat_ifnet_desc_link_status *link_status = &desc->link_status;
link_status->link_status_type = NSTAT_IFNET_DESC_LINK_STATUS_TYPE_NONE;
if (ifsr == NULL) {
return;
}
lck_rw_lock_shared(&ifp->if_link_status_lock);
if (ifp->if_type == IFT_CELLULAR) {
nstat_ifnet_desc_cellular_status *cell_status = &link_status->u.cellular;
struct if_cellular_status_v1 *if_cell_sr =
&ifsr->ifsr_u.ifsr_cell.if_cell_u.if_status_v1;
if (ifsr->ifsr_version != IF_CELLULAR_STATUS_REPORT_VERSION_1) {
goto done;
}
link_status->link_status_type = NSTAT_IFNET_DESC_LINK_STATUS_TYPE_CELLULAR;
if (if_cell_sr->valid_bitmask & IF_CELL_LINK_QUALITY_METRIC_VALID) {
cell_status->valid_bitmask |= NSTAT_IFNET_DESC_CELL_LINK_QUALITY_METRIC_VALID;
cell_status->link_quality_metric = if_cell_sr->link_quality_metric;
}
if (if_cell_sr->valid_bitmask & IF_CELL_UL_EFFECTIVE_BANDWIDTH_VALID) {
cell_status->valid_bitmask |= NSTAT_IFNET_DESC_CELL_UL_EFFECTIVE_BANDWIDTH_VALID;
cell_status->ul_effective_bandwidth = if_cell_sr->ul_effective_bandwidth;
}
if (if_cell_sr->valid_bitmask & IF_CELL_UL_MAX_BANDWIDTH_VALID) {
cell_status->valid_bitmask |= NSTAT_IFNET_DESC_CELL_UL_MAX_BANDWIDTH_VALID;
cell_status->ul_max_bandwidth = if_cell_sr->ul_max_bandwidth;
}
if (if_cell_sr->valid_bitmask & IF_CELL_UL_MIN_LATENCY_VALID) {
cell_status->valid_bitmask |= NSTAT_IFNET_DESC_CELL_UL_MIN_LATENCY_VALID;
cell_status->ul_min_latency = if_cell_sr->ul_min_latency;
}
if (if_cell_sr->valid_bitmask & IF_CELL_UL_EFFECTIVE_LATENCY_VALID) {
cell_status->valid_bitmask |= NSTAT_IFNET_DESC_CELL_UL_EFFECTIVE_LATENCY_VALID;
cell_status->ul_effective_latency = if_cell_sr->ul_effective_latency;
}
if (if_cell_sr->valid_bitmask & IF_CELL_UL_MAX_LATENCY_VALID) {
cell_status->valid_bitmask |= NSTAT_IFNET_DESC_CELL_UL_MAX_LATENCY_VALID;
cell_status->ul_max_latency = if_cell_sr->ul_max_latency;
}
if (if_cell_sr->valid_bitmask & IF_CELL_UL_RETXT_LEVEL_VALID) {
cell_status->valid_bitmask |= NSTAT_IFNET_DESC_CELL_UL_RETXT_LEVEL_VALID;
if (if_cell_sr->ul_retxt_level == IF_CELL_UL_RETXT_LEVEL_NONE) {
cell_status->ul_retxt_level = NSTAT_IFNET_DESC_CELL_UL_RETXT_LEVEL_NONE;
} else if (if_cell_sr->ul_retxt_level == IF_CELL_UL_RETXT_LEVEL_LOW) {
cell_status->ul_retxt_level = NSTAT_IFNET_DESC_CELL_UL_RETXT_LEVEL_LOW;
} else if (if_cell_sr->ul_retxt_level == IF_CELL_UL_RETXT_LEVEL_MEDIUM) {
cell_status->ul_retxt_level = NSTAT_IFNET_DESC_CELL_UL_RETXT_LEVEL_MEDIUM;
} else if (if_cell_sr->ul_retxt_level == IF_CELL_UL_RETXT_LEVEL_HIGH) {
cell_status->ul_retxt_level = NSTAT_IFNET_DESC_CELL_UL_RETXT_LEVEL_HIGH;
} else {
cell_status->valid_bitmask &= ~NSTAT_IFNET_DESC_CELL_UL_RETXT_LEVEL_VALID;
}
}
if (if_cell_sr->valid_bitmask & IF_CELL_UL_BYTES_LOST_VALID) {
cell_status->valid_bitmask |= NSTAT_IFNET_DESC_CELL_UL_BYTES_LOST_VALID;
cell_status->ul_bytes_lost = if_cell_sr->ul_bytes_lost;
}
if (if_cell_sr->valid_bitmask & IF_CELL_UL_MIN_QUEUE_SIZE_VALID) {
cell_status->valid_bitmask |= NSTAT_IFNET_DESC_CELL_UL_MIN_QUEUE_SIZE_VALID;
cell_status->ul_min_queue_size = if_cell_sr->ul_min_queue_size;
}
if (if_cell_sr->valid_bitmask & IF_CELL_UL_AVG_QUEUE_SIZE_VALID) {
cell_status->valid_bitmask |= NSTAT_IFNET_DESC_CELL_UL_AVG_QUEUE_SIZE_VALID;
cell_status->ul_avg_queue_size = if_cell_sr->ul_avg_queue_size;
}
if (if_cell_sr->valid_bitmask & IF_CELL_UL_MAX_QUEUE_SIZE_VALID) {
cell_status->valid_bitmask |= NSTAT_IFNET_DESC_CELL_UL_MAX_QUEUE_SIZE_VALID;
cell_status->ul_max_queue_size = if_cell_sr->ul_max_queue_size;
}
if (if_cell_sr->valid_bitmask & IF_CELL_DL_EFFECTIVE_BANDWIDTH_VALID) {
cell_status->valid_bitmask |= NSTAT_IFNET_DESC_CELL_DL_EFFECTIVE_BANDWIDTH_VALID;
cell_status->dl_effective_bandwidth = if_cell_sr->dl_effective_bandwidth;
}
if (if_cell_sr->valid_bitmask & IF_CELL_DL_MAX_BANDWIDTH_VALID) {
cell_status->valid_bitmask |= NSTAT_IFNET_DESC_CELL_DL_MAX_BANDWIDTH_VALID;
cell_status->dl_max_bandwidth = if_cell_sr->dl_max_bandwidth;
}
if (if_cell_sr->valid_bitmask & IF_CELL_CONFIG_INACTIVITY_TIME_VALID) {
cell_status->valid_bitmask |= NSTAT_IFNET_DESC_CELL_CONFIG_INACTIVITY_TIME_VALID;
cell_status->config_inactivity_time = if_cell_sr->config_inactivity_time;
}
if (if_cell_sr->valid_bitmask & IF_CELL_CONFIG_BACKOFF_TIME_VALID) {
cell_status->valid_bitmask |= NSTAT_IFNET_DESC_CELL_CONFIG_BACKOFF_TIME_VALID;
cell_status->config_backoff_time = if_cell_sr->config_backoff_time;
}
if (if_cell_sr->valid_bitmask & IF_CELL_UL_MSS_RECOMMENDED_VALID) {
cell_status->valid_bitmask |= NSTAT_IFNET_DESC_CELL_MSS_RECOMMENDED_VALID;
cell_status->mss_recommended = if_cell_sr->mss_recommended;
}
} else if (IFNET_IS_WIFI(ifp)) {
nstat_ifnet_desc_wifi_status *wifi_status = &link_status->u.wifi;
struct if_wifi_status_v1 *if_wifi_sr =
&ifsr->ifsr_u.ifsr_wifi.if_wifi_u.if_status_v1;
if (ifsr->ifsr_version != IF_WIFI_STATUS_REPORT_VERSION_1) {
goto done;
}
link_status->link_status_type = NSTAT_IFNET_DESC_LINK_STATUS_TYPE_WIFI;
if (if_wifi_sr->valid_bitmask & IF_WIFI_LINK_QUALITY_METRIC_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_LINK_QUALITY_METRIC_VALID;
wifi_status->link_quality_metric = if_wifi_sr->link_quality_metric;
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_UL_EFFECTIVE_BANDWIDTH_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_UL_EFFECTIVE_BANDWIDTH_VALID;
wifi_status->ul_effective_bandwidth = if_wifi_sr->ul_effective_bandwidth;
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_UL_MAX_BANDWIDTH_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_UL_MAX_BANDWIDTH_VALID;
wifi_status->ul_max_bandwidth = if_wifi_sr->ul_max_bandwidth;
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_UL_MIN_LATENCY_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_UL_MIN_LATENCY_VALID;
wifi_status->ul_min_latency = if_wifi_sr->ul_min_latency;
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_UL_EFFECTIVE_LATENCY_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_UL_EFFECTIVE_LATENCY_VALID;
wifi_status->ul_effective_latency = if_wifi_sr->ul_effective_latency;
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_UL_MAX_LATENCY_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_UL_MAX_LATENCY_VALID;
wifi_status->ul_max_latency = if_wifi_sr->ul_max_latency;
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_UL_RETXT_LEVEL_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_UL_RETXT_LEVEL_VALID;
if (if_wifi_sr->ul_retxt_level == IF_WIFI_UL_RETXT_LEVEL_NONE) {
wifi_status->ul_retxt_level = NSTAT_IFNET_DESC_WIFI_UL_RETXT_LEVEL_NONE;
} else if (if_wifi_sr->ul_retxt_level == IF_WIFI_UL_RETXT_LEVEL_LOW) {
wifi_status->ul_retxt_level = NSTAT_IFNET_DESC_WIFI_UL_RETXT_LEVEL_LOW;
} else if (if_wifi_sr->ul_retxt_level == IF_WIFI_UL_RETXT_LEVEL_MEDIUM) {
wifi_status->ul_retxt_level = NSTAT_IFNET_DESC_WIFI_UL_RETXT_LEVEL_MEDIUM;
} else if (if_wifi_sr->ul_retxt_level == IF_WIFI_UL_RETXT_LEVEL_HIGH) {
wifi_status->ul_retxt_level = NSTAT_IFNET_DESC_WIFI_UL_RETXT_LEVEL_HIGH;
} else {
wifi_status->valid_bitmask &= ~NSTAT_IFNET_DESC_WIFI_UL_RETXT_LEVEL_VALID;
}
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_UL_BYTES_LOST_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_UL_BYTES_LOST_VALID;
wifi_status->ul_bytes_lost = if_wifi_sr->ul_bytes_lost;
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_UL_ERROR_RATE_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_UL_ERROR_RATE_VALID;
wifi_status->ul_error_rate = if_wifi_sr->ul_error_rate;
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_DL_EFFECTIVE_BANDWIDTH_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_DL_EFFECTIVE_BANDWIDTH_VALID;
wifi_status->dl_effective_bandwidth = if_wifi_sr->dl_effective_bandwidth;
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_DL_MAX_BANDWIDTH_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_DL_MAX_BANDWIDTH_VALID;
wifi_status->dl_max_bandwidth = if_wifi_sr->dl_max_bandwidth;
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_DL_MIN_LATENCY_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_DL_MIN_LATENCY_VALID;
wifi_status->dl_min_latency = if_wifi_sr->dl_min_latency;
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_DL_EFFECTIVE_LATENCY_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_DL_EFFECTIVE_LATENCY_VALID;
wifi_status->dl_effective_latency = if_wifi_sr->dl_effective_latency;
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_DL_MAX_LATENCY_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_DL_MAX_LATENCY_VALID;
wifi_status->dl_max_latency = if_wifi_sr->dl_max_latency;
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_DL_ERROR_RATE_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_DL_ERROR_RATE_VALID;
wifi_status->dl_error_rate = if_wifi_sr->dl_error_rate;
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_CONFIG_FREQUENCY_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_CONFIG_FREQUENCY_VALID;
if (if_wifi_sr->config_frequency == IF_WIFI_CONFIG_FREQUENCY_2_4_GHZ) {
wifi_status->config_frequency = NSTAT_IFNET_DESC_WIFI_CONFIG_FREQUENCY_2_4_GHZ;
} else if (if_wifi_sr->config_frequency == IF_WIFI_CONFIG_FREQUENCY_5_0_GHZ) {
wifi_status->config_frequency = NSTAT_IFNET_DESC_WIFI_CONFIG_FREQUENCY_5_0_GHZ;
} else {
wifi_status->valid_bitmask &= ~NSTAT_IFNET_DESC_WIFI_CONFIG_FREQUENCY_VALID;
}
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_CONFIG_MULTICAST_RATE_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_CONFIG_MULTICAST_RATE_VALID;
wifi_status->config_multicast_rate = if_wifi_sr->config_multicast_rate;
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_CONFIG_SCAN_COUNT_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_CONFIG_SCAN_COUNT_VALID;
wifi_status->scan_count = if_wifi_sr->scan_count;
}
if (if_wifi_sr->valid_bitmask & IF_WIFI_CONFIG_SCAN_DURATION_VALID) {
wifi_status->valid_bitmask |= NSTAT_IFNET_DESC_WIFI_CONFIG_SCAN_DURATION_VALID;
wifi_status->scan_duration = if_wifi_sr->scan_duration;
}
}
done:
lck_rw_done(&ifp->if_link_status_lock);
}
static u_int64_t nstat_ifnet_last_report_time = 0;
extern int tcp_report_stats_interval;
static void
nstat_ifnet_compute_percentages(struct if_tcp_ecn_perf_stat *ifst)
{
/* Retransmit percentage */
if (ifst->total_rxmitpkts > 0 && ifst->total_txpkts > 0) {
/* shift by 10 for precision */
ifst->rxmit_percent =
((ifst->total_rxmitpkts << 10) * 100) / ifst->total_txpkts;
} else {
ifst->rxmit_percent = 0;
}
/* Out-of-order percentage */
if (ifst->total_oopkts > 0 && ifst->total_rxpkts > 0) {
/* shift by 10 for precision */
ifst->oo_percent =
((ifst->total_oopkts << 10) * 100) / ifst->total_rxpkts;
} else {
ifst->oo_percent = 0;
}
/* Reorder percentage */
if (ifst->total_reorderpkts > 0 &&
(ifst->total_txpkts + ifst->total_rxpkts) > 0) {
/* shift by 10 for precision */
ifst->reorder_percent =
((ifst->total_reorderpkts << 10) * 100) /
(ifst->total_txpkts + ifst->total_rxpkts);
} else {
ifst->reorder_percent = 0;
}
}
static void
nstat_ifnet_normalize_counter(struct if_tcp_ecn_stat *if_st)
{
u_int64_t ecn_on_conn, ecn_off_conn;
if (if_st == NULL) {
return;
}
ecn_on_conn = if_st->ecn_client_success +
if_st->ecn_server_success;
ecn_off_conn = if_st->ecn_off_conn +
(if_st->ecn_client_setup - if_st->ecn_client_success) +
(if_st->ecn_server_setup - if_st->ecn_server_success);
/*
* report sack episodes, rst_drop and rxmit_drop
* as a ratio per connection, shift by 10 for precision
*/
if (ecn_on_conn > 0) {
if_st->ecn_on.sack_episodes =
(if_st->ecn_on.sack_episodes << 10) / ecn_on_conn;
if_st->ecn_on.rst_drop =
(if_st->ecn_on.rst_drop << 10) * 100 / ecn_on_conn;
if_st->ecn_on.rxmit_drop =
(if_st->ecn_on.rxmit_drop << 10) * 100 / ecn_on_conn;
} else {
/* set to zero, just in case */
if_st->ecn_on.sack_episodes = 0;
if_st->ecn_on.rst_drop = 0;
if_st->ecn_on.rxmit_drop = 0;
}
if (ecn_off_conn > 0) {
if_st->ecn_off.sack_episodes =
(if_st->ecn_off.sack_episodes << 10) / ecn_off_conn;
if_st->ecn_off.rst_drop =
(if_st->ecn_off.rst_drop << 10) * 100 / ecn_off_conn;
if_st->ecn_off.rxmit_drop =
(if_st->ecn_off.rxmit_drop << 10) * 100 / ecn_off_conn;
} else {
if_st->ecn_off.sack_episodes = 0;
if_st->ecn_off.rst_drop = 0;
if_st->ecn_off.rxmit_drop = 0;
}
if_st->ecn_total_conn = ecn_off_conn + ecn_on_conn;
}
static void
nstat_ifnet_report_ecn_stats(void)
{
u_int64_t uptime, last_report_time;
struct nstat_sysinfo_data data;
struct nstat_sysinfo_ifnet_ecn_stats *st;
struct ifnet *ifp;
uptime = net_uptime();
if ((int)(uptime - nstat_ifnet_last_report_time) <
tcp_report_stats_interval) {
return;
}
last_report_time = nstat_ifnet_last_report_time;
nstat_ifnet_last_report_time = uptime;
data.flags = NSTAT_SYSINFO_IFNET_ECN_STATS;
st = &data.u.ifnet_ecn_stats;
ifnet_head_lock_shared();
TAILQ_FOREACH(ifp, &ifnet_head, if_link) {
if (ifp->if_ipv4_stat == NULL || ifp->if_ipv6_stat == NULL) {
continue;
}
if (!IF_FULLY_ATTACHED(ifp)) {
continue;
}
/* Limit reporting to Wifi, Ethernet and cellular. */
if (!(IFNET_IS_ETHERNET(ifp) || IFNET_IS_CELLULAR(ifp))) {
continue;
}
bzero(st, sizeof(*st));
if (IFNET_IS_CELLULAR(ifp)) {
st->ifnet_type = NSTAT_IFNET_ECN_TYPE_CELLULAR;
} else if (IFNET_IS_WIFI(ifp)) {
st->ifnet_type = NSTAT_IFNET_ECN_TYPE_WIFI;
} else {
st->ifnet_type = NSTAT_IFNET_ECN_TYPE_ETHERNET;
}
data.unsent_data_cnt = ifp->if_unsent_data_cnt;
/* skip if there was no update since last report */
if (ifp->if_ipv4_stat->timestamp <= 0 ||
ifp->if_ipv4_stat->timestamp < last_report_time) {
goto v6;
}
st->ifnet_proto = NSTAT_IFNET_ECN_PROTO_IPV4;
/* compute percentages using packet counts */
nstat_ifnet_compute_percentages(&ifp->if_ipv4_stat->ecn_on);
nstat_ifnet_compute_percentages(&ifp->if_ipv4_stat->ecn_off);
nstat_ifnet_normalize_counter(ifp->if_ipv4_stat);
bcopy(ifp->if_ipv4_stat, &st->ecn_stat,
sizeof(st->ecn_stat));
nstat_sysinfo_send_data(&data);
bzero(ifp->if_ipv4_stat, sizeof(*ifp->if_ipv4_stat));
v6:
/* skip if there was no update since last report */
if (ifp->if_ipv6_stat->timestamp <= 0 ||
ifp->if_ipv6_stat->timestamp < last_report_time) {
continue;
}
st->ifnet_proto = NSTAT_IFNET_ECN_PROTO_IPV6;
/* compute percentages using packet counts */
nstat_ifnet_compute_percentages(&ifp->if_ipv6_stat->ecn_on);
nstat_ifnet_compute_percentages(&ifp->if_ipv6_stat->ecn_off);
nstat_ifnet_normalize_counter(ifp->if_ipv6_stat);
bcopy(ifp->if_ipv6_stat, &st->ecn_stat,
sizeof(st->ecn_stat));
nstat_sysinfo_send_data(&data);
/* Zero the stats in ifp */
bzero(ifp->if_ipv6_stat, sizeof(*ifp->if_ipv6_stat));
}
ifnet_head_done();
}
/* Some thresholds to determine Low Iternet mode */
#define NSTAT_LIM_DL_MAX_BANDWIDTH_THRESHOLD 1000000 /* 1 Mbps */
#define NSTAT_LIM_UL_MAX_BANDWIDTH_THRESHOLD 500000 /* 500 Kbps */
#define NSTAT_LIM_UL_MIN_RTT_THRESHOLD 1000 /* 1 second */
#define NSTAT_LIM_CONN_TIMEOUT_PERCENT_THRESHOLD (10 << 10) /* 10 percent connection timeouts */
#define NSTAT_LIM_PACKET_LOSS_PERCENT_THRESHOLD (2 << 10) /* 2 percent packet loss rate */
static boolean_t
nstat_lim_activity_check(struct if_lim_perf_stat *st)
{
/* check that the current activity is enough to report stats */
if (st->lim_total_txpkts < nstat_lim_min_tx_pkts ||
st->lim_total_rxpkts < nstat_lim_min_rx_pkts ||
st->lim_conn_attempts == 0) {
return FALSE;
}
/*
* Compute percentages if there was enough activity. Use
* shift-left by 10 to preserve precision.
*/
st->lim_packet_loss_percent = ((st->lim_total_retxpkts << 10) /
st->lim_total_txpkts) * 100;
st->lim_packet_ooo_percent = ((st->lim_total_oopkts << 10) /
st->lim_total_rxpkts) * 100;
st->lim_conn_timeout_percent = ((st->lim_conn_timeouts << 10) /
st->lim_conn_attempts) * 100;
/*
* Is Low Internet detected? First order metrics are bandwidth
* and RTT. If these metrics are below the minimum thresholds
* defined then the network attachment can be classified as
* having Low Internet capacity.
*
* High connection timeout rate also indicates Low Internet
* capacity.
*/
if (st->lim_dl_max_bandwidth > 0 &&
st->lim_dl_max_bandwidth <= NSTAT_LIM_DL_MAX_BANDWIDTH_THRESHOLD) {
st->lim_dl_detected = 1;
}
if ((st->lim_ul_max_bandwidth > 0 &&
st->lim_ul_max_bandwidth <= NSTAT_LIM_UL_MAX_BANDWIDTH_THRESHOLD) ||
st->lim_rtt_min >= NSTAT_LIM_UL_MIN_RTT_THRESHOLD) {
st->lim_ul_detected = 1;
}
if (st->lim_conn_attempts > 20 &&
st->lim_conn_timeout_percent >=
NSTAT_LIM_CONN_TIMEOUT_PERCENT_THRESHOLD) {
st->lim_ul_detected = 1;
}
/*
* Second order metrics: If there was high packet loss even after
* using delay based algorithms then we classify it as Low Internet
* again
*/
if (st->lim_bk_txpkts >= nstat_lim_min_tx_pkts &&
st->lim_packet_loss_percent >=
NSTAT_LIM_PACKET_LOSS_PERCENT_THRESHOLD) {
st->lim_ul_detected = 1;
}
return TRUE;
}
static u_int64_t nstat_lim_last_report_time = 0;
static void
nstat_ifnet_report_lim_stats(void)
{
u_int64_t uptime;
struct nstat_sysinfo_data data;
struct nstat_sysinfo_lim_stats *st;
struct ifnet *ifp;
int err;
uptime = net_uptime();
if ((u_int32_t)(uptime - nstat_lim_last_report_time) <
nstat_lim_interval) {
return;
}
nstat_lim_last_report_time = uptime;
data.flags = NSTAT_SYSINFO_LIM_STATS;
st = &data.u.lim_stats;
data.unsent_data_cnt = 0;
ifnet_head_lock_shared();
TAILQ_FOREACH(ifp, &ifnet_head, if_link) {
if (!IF_FULLY_ATTACHED(ifp)) {
continue;
}
/* Limit reporting to Wifi, Ethernet and cellular */
if (!(IFNET_IS_ETHERNET(ifp) || IFNET_IS_CELLULAR(ifp))) {
continue;
}
if (!nstat_lim_activity_check(&ifp->if_lim_stat)) {
continue;
}
bzero(st, sizeof(*st));
st->ifnet_siglen = sizeof(st->ifnet_signature);
err = ifnet_get_netsignature(ifp, AF_INET,
(u_int8_t *)&st->ifnet_siglen, NULL,
st->ifnet_signature);
if (err != 0) {
err = ifnet_get_netsignature(ifp, AF_INET6,
(u_int8_t *)&st->ifnet_siglen, NULL,
st->ifnet_signature);
if (err != 0) {
continue;
}
}
ifnet_lock_shared(ifp);
if (IFNET_IS_CELLULAR(ifp)) {
st->ifnet_type = NSTAT_IFNET_DESC_LINK_STATUS_TYPE_CELLULAR;
} else if (IFNET_IS_WIFI(ifp)) {
st->ifnet_type = NSTAT_IFNET_DESC_LINK_STATUS_TYPE_WIFI;
} else {
st->ifnet_type = NSTAT_IFNET_DESC_LINK_STATUS_TYPE_ETHERNET;
}
bcopy(&ifp->if_lim_stat, &st->lim_stat,
sizeof(st->lim_stat));
/* Zero the stats in ifp */
bzero(&ifp->if_lim_stat, sizeof(ifp->if_lim_stat));
ifnet_lock_done(ifp);
nstat_sysinfo_send_data(&data);
}
ifnet_head_done();
}
static errno_t
nstat_ifnet_copy_descriptor(
nstat_provider_cookie_t cookie,
void *data,
size_t len)
{
nstat_ifnet_descriptor *desc = (nstat_ifnet_descriptor *)data;
struct nstat_ifnet_cookie *ifcookie =
(struct nstat_ifnet_cookie *)cookie;
struct ifnet *ifp = ifcookie->ifp;
if (len < sizeof(nstat_ifnet_descriptor)) {
return EINVAL;
}
if (nstat_ifnet_gone(cookie)) {
return EINVAL;
}
bzero(desc, sizeof(*desc));
ifnet_lock_shared(ifp);
strlcpy(desc->name, ifp->if_xname, sizeof(desc->name));
desc->ifindex = ifp->if_index;
desc->threshold = ifp->if_data_threshold;
desc->type = ifp->if_type;
if (ifp->if_desc.ifd_len < sizeof(desc->description)) {
memcpy(desc->description, ifp->if_desc.ifd_desc,
sizeof(desc->description));
}
nstat_ifnet_copy_link_status(ifp, desc);
ifnet_lock_done(ifp);
return 0;
}
static void
nstat_init_ifnet_provider(void)
{
bzero(&nstat_ifnet_provider, sizeof(nstat_ifnet_provider));
nstat_ifnet_provider.nstat_provider_id = NSTAT_PROVIDER_IFNET;
nstat_ifnet_provider.nstat_descriptor_length = sizeof(nstat_ifnet_descriptor);
nstat_ifnet_provider.nstat_lookup = nstat_ifnet_lookup;
nstat_ifnet_provider.nstat_gone = nstat_ifnet_gone;
nstat_ifnet_provider.nstat_counts = nstat_ifnet_counts;
nstat_ifnet_provider.nstat_watcher_add = NULL;
nstat_ifnet_provider.nstat_watcher_remove = NULL;
nstat_ifnet_provider.nstat_copy_descriptor = nstat_ifnet_copy_descriptor;
nstat_ifnet_provider.nstat_release = nstat_ifnet_release;
nstat_ifnet_provider.next = nstat_providers;
nstat_providers = &nstat_ifnet_provider;
}
__private_extern__ void
nstat_ifnet_threshold_reached(unsigned int ifindex)
{
nstat_control_state *state;
nstat_src *src;
struct ifnet *ifp;
struct nstat_ifnet_cookie *ifcookie;
lck_mtx_lock(&nstat_mtx);
for (state = nstat_controls; state; state = state->ncs_next) {
lck_mtx_lock(&state->ncs_mtx);
TAILQ_FOREACH(src, &state->ncs_src_queue, ns_control_link)
{
if (src->provider != &nstat_ifnet_provider) {
continue;
}
ifcookie = (struct nstat_ifnet_cookie *)src->cookie;
ifp = ifcookie->ifp;
if (ifp->if_index != ifindex) {
continue;
}
nstat_control_send_counts(state, src, 0, 0, NULL);
}
lck_mtx_unlock(&state->ncs_mtx);
}
lck_mtx_unlock(&nstat_mtx);
}
#pragma mark -- Sysinfo --
static void
nstat_set_keyval_scalar(nstat_sysinfo_keyval *kv, int key, u_int32_t val)
{
kv->nstat_sysinfo_key = key;
kv->nstat_sysinfo_flags = NSTAT_SYSINFO_FLAG_SCALAR;
kv->u.nstat_sysinfo_scalar = val;
kv->nstat_sysinfo_valsize = sizeof(kv->u.nstat_sysinfo_scalar);
}
static void
nstat_set_keyval_u64_scalar(nstat_sysinfo_keyval *kv, int key, u_int64_t val)
{
kv->nstat_sysinfo_key = key;
kv->nstat_sysinfo_flags = NSTAT_SYSINFO_FLAG_SCALAR;
kv->u.nstat_sysinfo_scalar = val;
kv->nstat_sysinfo_valsize = sizeof(kv->u.nstat_sysinfo_scalar);
}
static void
nstat_set_keyval_string(nstat_sysinfo_keyval *kv, int key, u_int8_t *buf,
u_int32_t len)
{
kv->nstat_sysinfo_key = key;
kv->nstat_sysinfo_flags = NSTAT_SYSINFO_FLAG_STRING;
kv->nstat_sysinfo_valsize = min(len,
NSTAT_SYSINFO_KEYVAL_STRING_MAXSIZE);
bcopy(buf, kv->u.nstat_sysinfo_string, kv->nstat_sysinfo_valsize);
}
static void
nstat_sysinfo_send_data_internal(
nstat_control_state *control,
nstat_sysinfo_data *data)
{
nstat_msg_sysinfo_counts *syscnt = NULL;
size_t allocsize = 0, countsize = 0, nkeyvals = 0, finalsize = 0;
nstat_sysinfo_keyval *kv;
errno_t result = 0;
size_t i = 0;
allocsize = offsetof(nstat_msg_sysinfo_counts, counts);
countsize = offsetof(nstat_sysinfo_counts, nstat_sysinfo_keyvals);
finalsize = allocsize;
/* get number of key-vals for each kind of stat */
switch (data->flags) {
case NSTAT_SYSINFO_MBUF_STATS:
nkeyvals = sizeof(struct nstat_sysinfo_mbuf_stats) /
sizeof(u_int32_t);
break;
case NSTAT_SYSINFO_TCP_STATS:
nkeyvals = NSTAT_SYSINFO_TCP_STATS_COUNT;
break;
case NSTAT_SYSINFO_IFNET_ECN_STATS:
nkeyvals = (sizeof(struct if_tcp_ecn_stat) /
sizeof(u_int64_t));
/* Two more keys for ifnet type and proto */
nkeyvals += 2;
/* One key for unsent data. */
nkeyvals++;
break;
case NSTAT_SYSINFO_LIM_STATS:
nkeyvals = NSTAT_LIM_STAT_KEYVAL_COUNT;
break;
case NSTAT_SYSINFO_NET_API_STATS:
nkeyvals = NSTAT_NET_API_STAT_KEYVAL_COUNT;
break;
default:
return;
}
countsize += sizeof(nstat_sysinfo_keyval) * nkeyvals;
allocsize += countsize;
syscnt = kheap_alloc(KHEAP_TEMP, allocsize, Z_WAITOK | Z_ZERO);
if (syscnt == NULL) {
return;
}
kv = (nstat_sysinfo_keyval *) &syscnt->counts.nstat_sysinfo_keyvals;
switch (data->flags) {
case NSTAT_SYSINFO_MBUF_STATS:
{
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_KEY_MBUF_256B_TOTAL,
data->u.mb_stats.total_256b);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_KEY_MBUF_2KB_TOTAL,
data->u.mb_stats.total_2kb);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_KEY_MBUF_4KB_TOTAL,
data->u.mb_stats.total_4kb);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MBUF_16KB_TOTAL,
data->u.mb_stats.total_16kb);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_KEY_SOCK_MBCNT,
data->u.mb_stats.sbmb_total);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_KEY_SOCK_ATMBLIMIT,
data->u.mb_stats.sb_atmbuflimit);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MBUF_DRAIN_CNT,
data->u.mb_stats.draincnt);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MBUF_MEM_RELEASED,
data->u.mb_stats.memreleased);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_KEY_SOCK_MBFLOOR,
data->u.mb_stats.sbmb_floor);
VERIFY(i == nkeyvals);
break;
}
case NSTAT_SYSINFO_TCP_STATS:
{
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_KEY_IPV4_AVGRTT,
data->u.tcp_stats.ipv4_avgrtt);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_KEY_IPV6_AVGRTT,
data->u.tcp_stats.ipv6_avgrtt);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_KEY_SEND_PLR,
data->u.tcp_stats.send_plr);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_KEY_RECV_PLR,
data->u.tcp_stats.recv_plr);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_KEY_SEND_TLRTO,
data->u.tcp_stats.send_tlrto_rate);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_KEY_SEND_REORDERRATE,
data->u.tcp_stats.send_reorder_rate);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_CONNECTION_ATTEMPTS,
data->u.tcp_stats.connection_attempts);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_CONNECTION_ACCEPTS,
data->u.tcp_stats.connection_accepts);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_CLIENT_ENABLED,
data->u.tcp_stats.ecn_client_enabled);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_SERVER_ENABLED,
data->u.tcp_stats.ecn_server_enabled);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_CLIENT_SETUP,
data->u.tcp_stats.ecn_client_setup);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_SERVER_SETUP,
data->u.tcp_stats.ecn_server_setup);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_CLIENT_SUCCESS,
data->u.tcp_stats.ecn_client_success);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_SERVER_SUCCESS,
data->u.tcp_stats.ecn_server_success);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_NOT_SUPPORTED,
data->u.tcp_stats.ecn_not_supported);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_LOST_SYN,
data->u.tcp_stats.ecn_lost_syn);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_LOST_SYNACK,
data->u.tcp_stats.ecn_lost_synack);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_RECV_CE,
data->u.tcp_stats.ecn_recv_ce);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_RECV_ECE,
data->u.tcp_stats.ecn_recv_ece);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_SENT_ECE,
data->u.tcp_stats.ecn_sent_ece);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_CONN_RECV_CE,
data->u.tcp_stats.ecn_conn_recv_ce);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_CONN_RECV_ECE,
data->u.tcp_stats.ecn_conn_recv_ece);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_CONN_PLNOCE,
data->u.tcp_stats.ecn_conn_plnoce);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_CONN_PL_CE,
data->u.tcp_stats.ecn_conn_pl_ce);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_CONN_NOPL_CE,
data->u.tcp_stats.ecn_conn_nopl_ce);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_FALLBACK_SYNLOSS,
data->u.tcp_stats.ecn_fallback_synloss);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_FALLBACK_REORDER,
data->u.tcp_stats.ecn_fallback_reorder);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_FALLBACK_CE,
data->u.tcp_stats.ecn_fallback_ce);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_TFO_SYN_DATA_RCV,
data->u.tcp_stats.tfo_syn_data_rcv);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_TFO_COOKIE_REQ_RCV,
data->u.tcp_stats.tfo_cookie_req_rcv);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_TFO_COOKIE_SENT,
data->u.tcp_stats.tfo_cookie_sent);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_TFO_COOKIE_INVALID,
data->u.tcp_stats.tfo_cookie_invalid);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_TFO_COOKIE_REQ,
data->u.tcp_stats.tfo_cookie_req);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_TFO_COOKIE_RCV,
data->u.tcp_stats.tfo_cookie_rcv);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_TFO_SYN_DATA_SENT,
data->u.tcp_stats.tfo_syn_data_sent);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_TFO_SYN_DATA_ACKED,
data->u.tcp_stats.tfo_syn_data_acked);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_TFO_SYN_LOSS,
data->u.tcp_stats.tfo_syn_loss);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_TFO_BLACKHOLE,
data->u.tcp_stats.tfo_blackhole);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_TFO_COOKIE_WRONG,
data->u.tcp_stats.tfo_cookie_wrong);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_TFO_NO_COOKIE_RCV,
data->u.tcp_stats.tfo_no_cookie_rcv);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_TFO_HEURISTICS_DISABLE,
data->u.tcp_stats.tfo_heuristics_disable);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_TFO_SEND_BLACKHOLE,
data->u.tcp_stats.tfo_sndblackhole);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_HANDOVER_ATTEMPT,
data->u.tcp_stats.mptcp_handover_attempt);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_INTERACTIVE_ATTEMPT,
data->u.tcp_stats.mptcp_interactive_attempt);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_AGGREGATE_ATTEMPT,
data->u.tcp_stats.mptcp_aggregate_attempt);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_FP_HANDOVER_ATTEMPT,
data->u.tcp_stats.mptcp_fp_handover_attempt);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_FP_INTERACTIVE_ATTEMPT,
data->u.tcp_stats.mptcp_fp_interactive_attempt);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_FP_AGGREGATE_ATTEMPT,
data->u.tcp_stats.mptcp_fp_aggregate_attempt);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_HEURISTIC_FALLBACK,
data->u.tcp_stats.mptcp_heuristic_fallback);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_FP_HEURISTIC_FALLBACK,
data->u.tcp_stats.mptcp_fp_heuristic_fallback);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_HANDOVER_SUCCESS_WIFI,
data->u.tcp_stats.mptcp_handover_success_wifi);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_HANDOVER_SUCCESS_CELL,
data->u.tcp_stats.mptcp_handover_success_cell);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_INTERACTIVE_SUCCESS,
data->u.tcp_stats.mptcp_interactive_success);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_AGGREGATE_SUCCESS,
data->u.tcp_stats.mptcp_aggregate_success);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_FP_HANDOVER_SUCCESS_WIFI,
data->u.tcp_stats.mptcp_fp_handover_success_wifi);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_FP_HANDOVER_SUCCESS_CELL,
data->u.tcp_stats.mptcp_fp_handover_success_cell);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_FP_INTERACTIVE_SUCCESS,
data->u.tcp_stats.mptcp_fp_interactive_success);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_FP_AGGREGATE_SUCCESS,
data->u.tcp_stats.mptcp_fp_aggregate_success);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_HANDOVER_CELL_FROM_WIFI,
data->u.tcp_stats.mptcp_handover_cell_from_wifi);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_HANDOVER_WIFI_FROM_CELL,
data->u.tcp_stats.mptcp_handover_wifi_from_cell);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_INTERACTIVE_CELL_FROM_WIFI,
data->u.tcp_stats.mptcp_interactive_cell_from_wifi);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_HANDOVER_CELL_BYTES,
data->u.tcp_stats.mptcp_handover_cell_bytes);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_INTERACTIVE_CELL_BYTES,
data->u.tcp_stats.mptcp_interactive_cell_bytes);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_AGGREGATE_CELL_BYTES,
data->u.tcp_stats.mptcp_aggregate_cell_bytes);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_HANDOVER_ALL_BYTES,
data->u.tcp_stats.mptcp_handover_all_bytes);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_INTERACTIVE_ALL_BYTES,
data->u.tcp_stats.mptcp_interactive_all_bytes);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_AGGREGATE_ALL_BYTES,
data->u.tcp_stats.mptcp_aggregate_all_bytes);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_BACK_TO_WIFI,
data->u.tcp_stats.mptcp_back_to_wifi);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_WIFI_PROXY,
data->u.tcp_stats.mptcp_wifi_proxy);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_CELL_PROXY,
data->u.tcp_stats.mptcp_cell_proxy);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_MPTCP_TRIGGERED_CELL,
data->u.tcp_stats.mptcp_triggered_cell);
VERIFY(i == nkeyvals);
break;
}
case NSTAT_SYSINFO_IFNET_ECN_STATS:
{
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_TYPE,
data->u.ifnet_ecn_stats.ifnet_type);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_PROTO,
data->u.ifnet_ecn_stats.ifnet_proto);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_CLIENT_SETUP,
data->u.ifnet_ecn_stats.ecn_stat.ecn_client_setup);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_SERVER_SETUP,
data->u.ifnet_ecn_stats.ecn_stat.ecn_server_setup);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_CLIENT_SUCCESS,
data->u.ifnet_ecn_stats.ecn_stat.ecn_client_success);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_SERVER_SUCCESS,
data->u.ifnet_ecn_stats.ecn_stat.ecn_server_success);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_PEER_NOSUPPORT,
data->u.ifnet_ecn_stats.ecn_stat.ecn_peer_nosupport);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_SYN_LOST,
data->u.ifnet_ecn_stats.ecn_stat.ecn_syn_lost);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_SYNACK_LOST,
data->u.ifnet_ecn_stats.ecn_stat.ecn_synack_lost);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_RECV_CE,
data->u.ifnet_ecn_stats.ecn_stat.ecn_recv_ce);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_RECV_ECE,
data->u.ifnet_ecn_stats.ecn_stat.ecn_recv_ece);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_CONN_RECV_CE,
data->u.ifnet_ecn_stats.ecn_stat.ecn_conn_recv_ce);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_CONN_RECV_ECE,
data->u.ifnet_ecn_stats.ecn_stat.ecn_conn_recv_ece);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_CONN_PLNOCE,
data->u.ifnet_ecn_stats.ecn_stat.ecn_conn_plnoce);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_CONN_PLCE,
data->u.ifnet_ecn_stats.ecn_stat.ecn_conn_plce);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_CONN_NOPLCE,
data->u.ifnet_ecn_stats.ecn_stat.ecn_conn_noplce);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_FALLBACK_SYNLOSS,
data->u.ifnet_ecn_stats.ecn_stat.ecn_fallback_synloss);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_FALLBACK_REORDER,
data->u.ifnet_ecn_stats.ecn_stat.ecn_fallback_reorder);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_FALLBACK_CE,
data->u.ifnet_ecn_stats.ecn_stat.ecn_fallback_ce);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_ON_RTT_AVG,
data->u.ifnet_ecn_stats.ecn_stat.ecn_on.rtt_avg);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_ON_RTT_VAR,
data->u.ifnet_ecn_stats.ecn_stat.ecn_on.rtt_var);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_ON_OOPERCENT,
data->u.ifnet_ecn_stats.ecn_stat.ecn_on.oo_percent);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_ON_SACK_EPISODE,
data->u.ifnet_ecn_stats.ecn_stat.ecn_on.sack_episodes);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_ON_REORDER_PERCENT,
data->u.ifnet_ecn_stats.ecn_stat.ecn_on.reorder_percent);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_ON_RXMIT_PERCENT,
data->u.ifnet_ecn_stats.ecn_stat.ecn_on.rxmit_percent);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_ON_RXMIT_DROP,
data->u.ifnet_ecn_stats.ecn_stat.ecn_on.rxmit_drop);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_OFF_RTT_AVG,
data->u.ifnet_ecn_stats.ecn_stat.ecn_off.rtt_avg);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_OFF_RTT_VAR,
data->u.ifnet_ecn_stats.ecn_stat.ecn_off.rtt_var);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_OFF_OOPERCENT,
data->u.ifnet_ecn_stats.ecn_stat.ecn_off.oo_percent);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_OFF_SACK_EPISODE,
data->u.ifnet_ecn_stats.ecn_stat.ecn_off.sack_episodes);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_OFF_REORDER_PERCENT,
data->u.ifnet_ecn_stats.ecn_stat.ecn_off.reorder_percent);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_OFF_RXMIT_PERCENT,
data->u.ifnet_ecn_stats.ecn_stat.ecn_off.rxmit_percent);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_OFF_RXMIT_DROP,
data->u.ifnet_ecn_stats.ecn_stat.ecn_off.rxmit_drop);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_ON_TOTAL_TXPKTS,
data->u.ifnet_ecn_stats.ecn_stat.ecn_on.total_txpkts);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_ON_TOTAL_RXMTPKTS,
data->u.ifnet_ecn_stats.ecn_stat.ecn_on.total_rxmitpkts);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_ON_TOTAL_RXPKTS,
data->u.ifnet_ecn_stats.ecn_stat.ecn_on.total_rxpkts);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_ON_TOTAL_OOPKTS,
data->u.ifnet_ecn_stats.ecn_stat.ecn_on.total_oopkts);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_ON_DROP_RST,
data->u.ifnet_ecn_stats.ecn_stat.ecn_on.rst_drop);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_OFF_TOTAL_TXPKTS,
data->u.ifnet_ecn_stats.ecn_stat.ecn_off.total_txpkts);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_OFF_TOTAL_RXMTPKTS,
data->u.ifnet_ecn_stats.ecn_stat.ecn_off.total_rxmitpkts);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_OFF_TOTAL_RXPKTS,
data->u.ifnet_ecn_stats.ecn_stat.ecn_off.total_rxpkts);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_OFF_TOTAL_OOPKTS,
data->u.ifnet_ecn_stats.ecn_stat.ecn_off.total_oopkts);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_OFF_DROP_RST,
data->u.ifnet_ecn_stats.ecn_stat.ecn_off.rst_drop);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_TOTAL_CONN,
data->u.ifnet_ecn_stats.ecn_stat.ecn_total_conn);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_IFNET_UNSENT_DATA,
data->unsent_data_cnt);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_FALLBACK_DROPRST,
data->u.ifnet_ecn_stats.ecn_stat.ecn_fallback_droprst);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_FALLBACK_DROPRXMT,
data->u.ifnet_ecn_stats.ecn_stat.ecn_fallback_droprxmt);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_ECN_IFNET_FALLBACK_SYNRST,
data->u.ifnet_ecn_stats.ecn_stat.ecn_fallback_synrst);
break;
}
case NSTAT_SYSINFO_LIM_STATS:
{
nstat_set_keyval_string(&kv[i++],
NSTAT_SYSINFO_LIM_IFNET_SIGNATURE,
data->u.lim_stats.ifnet_signature,
data->u.lim_stats.ifnet_siglen);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_LIM_IFNET_DL_MAX_BANDWIDTH,
data->u.lim_stats.lim_stat.lim_dl_max_bandwidth);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_LIM_IFNET_UL_MAX_BANDWIDTH,
data->u.lim_stats.lim_stat.lim_ul_max_bandwidth);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_LIM_IFNET_PACKET_LOSS_PERCENT,
data->u.lim_stats.lim_stat.lim_packet_loss_percent);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_LIM_IFNET_PACKET_OOO_PERCENT,
data->u.lim_stats.lim_stat.lim_packet_ooo_percent);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_LIM_IFNET_RTT_VARIANCE,
data->u.lim_stats.lim_stat.lim_rtt_variance);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_LIM_IFNET_RTT_MIN,
data->u.lim_stats.lim_stat.lim_rtt_min);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_LIM_IFNET_RTT_AVG,
data->u.lim_stats.lim_stat.lim_rtt_average);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_LIM_IFNET_CONN_TIMEOUT_PERCENT,
data->u.lim_stats.lim_stat.lim_conn_timeout_percent);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_LIM_IFNET_DL_DETECTED,
data->u.lim_stats.lim_stat.lim_dl_detected);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_LIM_IFNET_UL_DETECTED,
data->u.lim_stats.lim_stat.lim_ul_detected);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_LIM_IFNET_TYPE,
data->u.lim_stats.ifnet_type);
break;
}
case NSTAT_SYSINFO_NET_API_STATS:
{
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_IF_FLTR_ATTACH,
data->u.net_api_stats.net_api_stats.nas_iflt_attach_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_IF_FLTR_ATTACH_OS,
data->u.net_api_stats.net_api_stats.nas_iflt_attach_os_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_IP_FLTR_ADD,
data->u.net_api_stats.net_api_stats.nas_ipf_add_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_IP_FLTR_ADD_OS,
data->u.net_api_stats.net_api_stats.nas_ipf_add_os_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_FLTR_ATTACH,
data->u.net_api_stats.net_api_stats.nas_sfltr_register_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_FLTR_ATTACH_OS,
data->u.net_api_stats.net_api_stats.nas_sfltr_register_os_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_ALLOC_TOTAL,
data->u.net_api_stats.net_api_stats.nas_socket_alloc_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_ALLOC_KERNEL,
data->u.net_api_stats.net_api_stats.nas_socket_in_kernel_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_ALLOC_KERNEL_OS,
data->u.net_api_stats.net_api_stats.nas_socket_in_kernel_os_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_NECP_CLIENTUUID,
data->u.net_api_stats.net_api_stats.nas_socket_necp_clientuuid_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_DOMAIN_LOCAL,
data->u.net_api_stats.net_api_stats.nas_socket_domain_local_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_DOMAIN_ROUTE,
data->u.net_api_stats.net_api_stats.nas_socket_domain_route_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_DOMAIN_INET,
data->u.net_api_stats.net_api_stats.nas_socket_domain_inet_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_DOMAIN_INET6,
data->u.net_api_stats.net_api_stats.nas_socket_domain_inet6_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_DOMAIN_SYSTEM,
data->u.net_api_stats.net_api_stats.nas_socket_domain_system_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_DOMAIN_MULTIPATH,
data->u.net_api_stats.net_api_stats.nas_socket_domain_multipath_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_DOMAIN_KEY,
data->u.net_api_stats.net_api_stats.nas_socket_domain_key_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_DOMAIN_NDRV,
data->u.net_api_stats.net_api_stats.nas_socket_domain_ndrv_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_DOMAIN_OTHER,
data->u.net_api_stats.net_api_stats.nas_socket_domain_other_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_INET_STREAM,
data->u.net_api_stats.net_api_stats.nas_socket_inet_stream_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_INET_DGRAM,
data->u.net_api_stats.net_api_stats.nas_socket_inet_dgram_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_INET_DGRAM_CONNECTED,
data->u.net_api_stats.net_api_stats.nas_socket_inet_dgram_connected);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_INET_DGRAM_DNS,
data->u.net_api_stats.net_api_stats.nas_socket_inet_dgram_dns);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_INET_DGRAM_NO_DATA,
data->u.net_api_stats.net_api_stats.nas_socket_inet_dgram_no_data);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_INET6_STREAM,
data->u.net_api_stats.net_api_stats.nas_socket_inet6_stream_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_INET6_DGRAM,
data->u.net_api_stats.net_api_stats.nas_socket_inet6_dgram_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_INET6_DGRAM_CONNECTED,
data->u.net_api_stats.net_api_stats.nas_socket_inet6_dgram_connected);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_INET6_DGRAM_DNS,
data->u.net_api_stats.net_api_stats.nas_socket_inet6_dgram_dns);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_INET6_DGRAM_NO_DATA,
data->u.net_api_stats.net_api_stats.nas_socket_inet6_dgram_no_data);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_INET_MCAST_JOIN,
data->u.net_api_stats.net_api_stats.nas_socket_mcast_join_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_SOCK_INET_MCAST_JOIN_OS,
data->u.net_api_stats.net_api_stats.nas_socket_mcast_join_os_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_NEXUS_FLOW_INET_STREAM,
data->u.net_api_stats.net_api_stats.nas_nx_flow_inet_stream_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_NEXUS_FLOW_INET_DATAGRAM,
data->u.net_api_stats.net_api_stats.nas_nx_flow_inet_dgram_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_NEXUS_FLOW_INET6_STREAM,
data->u.net_api_stats.net_api_stats.nas_nx_flow_inet6_stream_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_NEXUS_FLOW_INET6_DATAGRAM,
data->u.net_api_stats.net_api_stats.nas_nx_flow_inet6_dgram_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_IFNET_ALLOC,
data->u.net_api_stats.net_api_stats.nas_ifnet_alloc_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_IFNET_ALLOC_OS,
data->u.net_api_stats.net_api_stats.nas_ifnet_alloc_os_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_PF_ADDRULE,
data->u.net_api_stats.net_api_stats.nas_pf_addrule_total);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_PF_ADDRULE_OS,
data->u.net_api_stats.net_api_stats.nas_pf_addrule_os);
nstat_set_keyval_u64_scalar(&kv[i++],
NSTAT_SYSINFO_API_VMNET_START,
data->u.net_api_stats.net_api_stats.nas_vmnet_total);
nstat_set_keyval_scalar(&kv[i++],
NSTAT_SYSINFO_API_REPORT_INTERVAL,
data->u.net_api_stats.report_interval);
break;
}
}
if (syscnt != NULL) {
VERIFY(i > 0 && i <= nkeyvals);
countsize = offsetof(nstat_sysinfo_counts,
nstat_sysinfo_keyvals) +
sizeof(nstat_sysinfo_keyval) * i;
finalsize += countsize;
syscnt->hdr.type = NSTAT_MSG_TYPE_SYSINFO_COUNTS;
assert(finalsize <= MAX_NSTAT_MSG_HDR_LENGTH);
syscnt->hdr.length = (u_int16_t)finalsize;
syscnt->counts.nstat_sysinfo_len = (u_int32_t)countsize;
result = ctl_enqueuedata(control->ncs_kctl,
control->ncs_unit, syscnt, finalsize, CTL_DATA_EOR);
if (result != 0) {
nstat_stats.nstat_sysinfofailures += 1;
}
kheap_free(KHEAP_TEMP, syscnt, allocsize);
}
return;
}
__private_extern__ void
nstat_sysinfo_send_data(
nstat_sysinfo_data *data)
{
nstat_control_state *control;
lck_mtx_lock(&nstat_mtx);
for (control = nstat_controls; control; control = control->ncs_next) {
lck_mtx_lock(&control->ncs_mtx);
if ((control->ncs_flags & NSTAT_FLAG_SYSINFO_SUBSCRIBED) != 0) {
nstat_sysinfo_send_data_internal(control, data);
}
lck_mtx_unlock(&control->ncs_mtx);
}
lck_mtx_unlock(&nstat_mtx);
}
static void
nstat_sysinfo_generate_report(void)
{
mbuf_report_peak_usage();
tcp_report_stats();
nstat_ifnet_report_ecn_stats();
nstat_ifnet_report_lim_stats();
nstat_net_api_report_stats();
}
#pragma mark -- net_api --
static struct net_api_stats net_api_stats_before;
static u_int64_t net_api_stats_last_report_time;
static void
nstat_net_api_report_stats(void)
{
struct nstat_sysinfo_data data;
struct nstat_sysinfo_net_api_stats *st = &data.u.net_api_stats;
u_int64_t uptime;
uptime = net_uptime();
if ((u_int32_t)(uptime - net_api_stats_last_report_time) <
net_api_stats_report_interval) {
return;
}
st->report_interval = (u_int32_t)(uptime - net_api_stats_last_report_time);
net_api_stats_last_report_time = uptime;
data.flags = NSTAT_SYSINFO_NET_API_STATS;
data.unsent_data_cnt = 0;
/*
* Some of the fields in the report are the current value and
* other fields are the delta from the last report:
* - Report difference for the per flow counters as they increase
* with time
* - Report current value for other counters as they tend not to change
* much with time
*/
#define STATCOPY(f) \
(st->net_api_stats.f = net_api_stats.f)
#define STATDIFF(f) \
(st->net_api_stats.f = net_api_stats.f - net_api_stats_before.f)
STATCOPY(nas_iflt_attach_count);
STATCOPY(nas_iflt_attach_total);
STATCOPY(nas_iflt_attach_os_total);
STATCOPY(nas_ipf_add_count);
STATCOPY(nas_ipf_add_total);
STATCOPY(nas_ipf_add_os_total);
STATCOPY(nas_sfltr_register_count);
STATCOPY(nas_sfltr_register_total);
STATCOPY(nas_sfltr_register_os_total);
STATDIFF(nas_socket_alloc_total);
STATDIFF(nas_socket_in_kernel_total);
STATDIFF(nas_socket_in_kernel_os_total);
STATDIFF(nas_socket_necp_clientuuid_total);
STATDIFF(nas_socket_domain_local_total);
STATDIFF(nas_socket_domain_route_total);
STATDIFF(nas_socket_domain_inet_total);
STATDIFF(nas_socket_domain_inet6_total);
STATDIFF(nas_socket_domain_system_total);
STATDIFF(nas_socket_domain_multipath_total);
STATDIFF(nas_socket_domain_key_total);
STATDIFF(nas_socket_domain_ndrv_total);
STATDIFF(nas_socket_domain_other_total);
STATDIFF(nas_socket_inet_stream_total);
STATDIFF(nas_socket_inet_dgram_total);
STATDIFF(nas_socket_inet_dgram_connected);
STATDIFF(nas_socket_inet_dgram_dns);
STATDIFF(nas_socket_inet_dgram_no_data);
STATDIFF(nas_socket_inet6_stream_total);
STATDIFF(nas_socket_inet6_dgram_total);
STATDIFF(nas_socket_inet6_dgram_connected);
STATDIFF(nas_socket_inet6_dgram_dns);
STATDIFF(nas_socket_inet6_dgram_no_data);
STATDIFF(nas_socket_mcast_join_total);
STATDIFF(nas_socket_mcast_join_os_total);
STATDIFF(nas_sock_inet6_stream_exthdr_in);
STATDIFF(nas_sock_inet6_stream_exthdr_out);
STATDIFF(nas_sock_inet6_dgram_exthdr_in);
STATDIFF(nas_sock_inet6_dgram_exthdr_out);
STATDIFF(nas_nx_flow_inet_stream_total);
STATDIFF(nas_nx_flow_inet_dgram_total);
STATDIFF(nas_nx_flow_inet6_stream_total);
STATDIFF(nas_nx_flow_inet6_dgram_total);
STATCOPY(nas_ifnet_alloc_count);
STATCOPY(nas_ifnet_alloc_total);
STATCOPY(nas_ifnet_alloc_os_count);
STATCOPY(nas_ifnet_alloc_os_total);
STATCOPY(nas_pf_addrule_total);
STATCOPY(nas_pf_addrule_os);
STATCOPY(nas_vmnet_total);
#undef STATCOPY
#undef STATDIFF
nstat_sysinfo_send_data(&data);
/*
* Save a copy of the current fields so we can diff them the next time
*/
memcpy(&net_api_stats_before, &net_api_stats,
sizeof(struct net_api_stats));
_CASSERT(sizeof(net_api_stats_before) == sizeof(net_api_stats));
}
#pragma mark -- Kernel Control Socket --
static kern_ctl_ref nstat_ctlref = NULL;
static lck_grp_t *nstat_lck_grp = NULL;
static errno_t nstat_control_connect(kern_ctl_ref kctl, struct sockaddr_ctl *sac, void **uinfo);
static errno_t nstat_control_disconnect(kern_ctl_ref kctl, u_int32_t unit, void *uinfo);
static errno_t nstat_control_send(kern_ctl_ref kctl, u_int32_t unit, void *uinfo, mbuf_t m, int flags);
static errno_t
nstat_enqueue_success(
uint64_t context,
nstat_control_state *state,
u_int16_t flags)
{
nstat_msg_hdr success;
errno_t result;
bzero(&success, sizeof(success));
success.context = context;
success.type = NSTAT_MSG_TYPE_SUCCESS;
success.length = sizeof(success);
success.flags = flags;
result = ctl_enqueuedata(state->ncs_kctl, state->ncs_unit, &success,
sizeof(success), CTL_DATA_EOR | CTL_DATA_CRIT);
if (result != 0) {
if (nstat_debug != 0) {
printf("%s: could not enqueue success message %d\n",
__func__, result);
}
nstat_stats.nstat_successmsgfailures += 1;
}
return result;
}
static errno_t
nstat_control_send_event(
nstat_control_state *state,
nstat_src *src,
u_int64_t event)
{
errno_t result = 0;
int failed = 0;
if (nstat_control_reporting_allowed(state, src)) {
if ((state->ncs_flags & NSTAT_FLAG_SUPPORTS_UPDATES) != 0) {
result = nstat_control_send_update(state, src, 0, event, 0, NULL);
if (result != 0) {
failed = 1;
if (nstat_debug != 0) {
printf("%s - nstat_control_send_event() %d\n", __func__, result);
}
}
} else {
if (nstat_debug != 0) {
printf("%s - nstat_control_send_event() used when updates not supported\n", __func__);
}
}
}
return result;
}
static errno_t
nstat_control_send_goodbye(
nstat_control_state *state,
nstat_src *src)
{
errno_t result = 0;
int failed = 0;
if (nstat_control_reporting_allowed(state, src)) {
if ((state->ncs_flags & NSTAT_FLAG_SUPPORTS_UPDATES) != 0) {
result = nstat_control_send_update(state, src, 0, 0, NSTAT_MSG_HDR_FLAG_CLOSING, NULL);
if (result != 0) {
failed = 1;
if (nstat_debug != 0) {
printf("%s - nstat_control_send_update() %d\n", __func__, result);
}
}
} else {
// send one last counts notification
result = nstat_control_send_counts(state, src, 0, NSTAT_MSG_HDR_FLAG_CLOSING, NULL);
if (result != 0) {
failed = 1;
if (nstat_debug != 0) {
printf("%s - nstat_control_send_counts() %d\n", __func__, result);
}
}
// send a last description
result = nstat_control_send_description(state, src, 0, NSTAT_MSG_HDR_FLAG_CLOSING);
if (result != 0) {
failed = 1;
if (nstat_debug != 0) {
printf("%s - nstat_control_send_description() %d\n", __func__, result);
}
}
}
}
// send the source removed notification
result = nstat_control_send_removed(state, src);
if (result != 0 && nstat_debug) {
failed = 1;
if (nstat_debug != 0) {
printf("%s - nstat_control_send_removed() %d\n", __func__, result);
}
}
if (failed != 0) {
nstat_stats.nstat_control_send_goodbye_failures++;
}
return result;
}
static errno_t
nstat_flush_accumulated_msgs(
nstat_control_state *state)
{
errno_t result = 0;
if (state->ncs_accumulated != NULL && mbuf_len(state->ncs_accumulated) > 0) {
mbuf_pkthdr_setlen(state->ncs_accumulated, mbuf_len(state->ncs_accumulated));
result = ctl_enqueuembuf(state->ncs_kctl, state->ncs_unit, state->ncs_accumulated, CTL_DATA_EOR);
if (result != 0) {
nstat_stats.nstat_flush_accumulated_msgs_failures++;
if (nstat_debug != 0) {
printf("%s - ctl_enqueuembuf failed: %d\n", __func__, result);
}
mbuf_freem(state->ncs_accumulated);
}
state->ncs_accumulated = NULL;
}
return result;
}
static errno_t
nstat_accumulate_msg(
nstat_control_state *state,
nstat_msg_hdr *hdr,
size_t length)
{
assert(length <= MAX_NSTAT_MSG_HDR_LENGTH);
if (state->ncs_accumulated && mbuf_trailingspace(state->ncs_accumulated) < length) {
// Will send the current mbuf
nstat_flush_accumulated_msgs(state);
}
errno_t result = 0;
if (state->ncs_accumulated == NULL) {
unsigned int one = 1;
if (mbuf_allocpacket(MBUF_DONTWAIT, NSTAT_MAX_MSG_SIZE, &one, &state->ncs_accumulated) != 0) {
if (nstat_debug != 0) {
printf("%s - mbuf_allocpacket failed\n", __func__);
}
result = ENOMEM;
} else {
mbuf_setlen(state->ncs_accumulated, 0);
}
}
if (result == 0) {
hdr->length = (u_int16_t)length;
result = mbuf_copyback(state->ncs_accumulated, mbuf_len(state->ncs_accumulated),
length, hdr, MBUF_DONTWAIT);
}
if (result != 0) {
nstat_flush_accumulated_msgs(state);
if (nstat_debug != 0) {
printf("%s - resorting to ctl_enqueuedata\n", __func__);
}
result = ctl_enqueuedata(state->ncs_kctl, state->ncs_unit, hdr, length, CTL_DATA_EOR);
}
if (result != 0) {
nstat_stats.nstat_accumulate_msg_failures++;
}
return result;
}
static void*
nstat_idle_check(
__unused thread_call_param_t p0,
__unused thread_call_param_t p1)
{
nstat_control_state *control;
nstat_src *src, *tmpsrc;
tailq_head_nstat_src dead_list;
TAILQ_INIT(&dead_list);
lck_mtx_lock(&nstat_mtx);
nstat_idle_time = 0;
for (control = nstat_controls; control; control = control->ncs_next) {
lck_mtx_lock(&control->ncs_mtx);
if (!(control->ncs_flags & NSTAT_FLAG_REQCOUNTS)) {
TAILQ_FOREACH_SAFE(src, &control->ncs_src_queue, ns_control_link, tmpsrc)
{
if (src->provider->nstat_gone(src->cookie)) {
errno_t result;
// Pull it off the list
TAILQ_REMOVE(&control->ncs_src_queue, src, ns_control_link);
result = nstat_control_send_goodbye(control, src);
// Put this on the list to release later
TAILQ_INSERT_TAIL(&dead_list, src, ns_control_link);
}
}
}
control->ncs_flags &= ~NSTAT_FLAG_REQCOUNTS;
lck_mtx_unlock(&control->ncs_mtx);
}
if (nstat_controls) {
clock_interval_to_deadline(60, NSEC_PER_SEC, &nstat_idle_time);
thread_call_func_delayed((thread_call_func_t)nstat_idle_check, NULL, nstat_idle_time);
}
lck_mtx_unlock(&nstat_mtx);
/* Generate any system level reports, if needed */
nstat_sysinfo_generate_report();
// Release the sources now that we aren't holding lots of locks
while ((src = TAILQ_FIRST(&dead_list))) {
TAILQ_REMOVE(&dead_list, src, ns_control_link);
nstat_control_cleanup_source(NULL, src, FALSE);
}
return NULL;
}
static void
nstat_control_register(void)
{
// Create our lock group first
lck_grp_attr_t *grp_attr = lck_grp_attr_alloc_init();
lck_grp_attr_setdefault(grp_attr);
nstat_lck_grp = lck_grp_alloc_init("network statistics kctl", grp_attr);
lck_grp_attr_free(grp_attr);
lck_mtx_init(&nstat_mtx, nstat_lck_grp, NULL);
// Register the control
struct kern_ctl_reg nstat_control;
bzero(&nstat_control, sizeof(nstat_control));
strlcpy(nstat_control.ctl_name, NET_STAT_CONTROL_NAME, sizeof(nstat_control.ctl_name));
nstat_control.ctl_flags = CTL_FLAG_REG_EXTENDED | CTL_FLAG_REG_CRIT;
nstat_control.ctl_sendsize = nstat_sendspace;
nstat_control.ctl_recvsize = nstat_recvspace;
nstat_control.ctl_connect = nstat_control_connect;
nstat_control.ctl_disconnect = nstat_control_disconnect;
nstat_control.ctl_send = nstat_control_send;
ctl_register(&nstat_control, &nstat_ctlref);
}
static void
nstat_control_cleanup_source(
nstat_control_state *state,
struct nstat_src *src,
boolean_t locked)
{
errno_t result;
if (state) {
result = nstat_control_send_removed(state, src);
if (result != 0) {
nstat_stats.nstat_control_cleanup_source_failures++;
if (nstat_debug != 0) {
printf("%s - nstat_control_send_removed() %d\n",
__func__, result);
}
}
}
// Cleanup the source if we found it.
src->provider->nstat_release(src->cookie, locked);
kheap_free(KHEAP_NET_STAT, src, sizeof(*src));
}
static bool
nstat_control_reporting_allowed(
nstat_control_state *state,
nstat_src *src)
{
if (src->provider->nstat_reporting_allowed == NULL) {
return TRUE;
}
return src->provider->nstat_reporting_allowed(src->cookie,
&state->ncs_provider_filters[src->provider->nstat_provider_id]);
}
static errno_t
nstat_control_connect(
kern_ctl_ref kctl,
struct sockaddr_ctl *sac,
void **uinfo)
{
nstat_control_state *state = kheap_alloc(KHEAP_NET_STAT,
sizeof(*state), Z_WAITOK | Z_ZERO);
if (state == NULL) {
return ENOMEM;
}
lck_mtx_init(&state->ncs_mtx, nstat_lck_grp, NULL);
state->ncs_kctl = kctl;
state->ncs_unit = sac->sc_unit;
state->ncs_flags = NSTAT_FLAG_REQCOUNTS;
*uinfo = state;
lck_mtx_lock(&nstat_mtx);
state->ncs_next = nstat_controls;
nstat_controls = state;
if (nstat_idle_time == 0) {
clock_interval_to_deadline(60, NSEC_PER_SEC, &nstat_idle_time);
thread_call_func_delayed((thread_call_func_t)nstat_idle_check, NULL, nstat_idle_time);
}
lck_mtx_unlock(&nstat_mtx);
return 0;
}
static errno_t
nstat_control_disconnect(
__unused kern_ctl_ref kctl,
__unused u_int32_t unit,
void *uinfo)
{
u_int32_t watching;
nstat_control_state *state = (nstat_control_state*)uinfo;
tailq_head_nstat_src cleanup_list;
nstat_src *src;
TAILQ_INIT(&cleanup_list);
// pull it out of the global list of states
lck_mtx_lock(&nstat_mtx);
nstat_control_state **statepp;
for (statepp = &nstat_controls; *statepp; statepp = &(*statepp)->ncs_next) {
if (*statepp == state) {
*statepp = state->ncs_next;
break;
}
}
lck_mtx_unlock(&nstat_mtx);
lck_mtx_lock(&state->ncs_mtx);
// Stop watching for sources
nstat_provider *provider;
watching = state->ncs_watching;
state->ncs_watching = 0;
for (provider = nstat_providers; provider && watching; provider = provider->next) {
if ((watching & (1 << provider->nstat_provider_id)) != 0) {
watching &= ~(1 << provider->nstat_provider_id);
provider->nstat_watcher_remove(state);
}
}
// set cleanup flags
state->ncs_flags |= NSTAT_FLAG_CLEANUP;
if (state->ncs_accumulated) {
mbuf_freem(state->ncs_accumulated);
state->ncs_accumulated = NULL;
}
// Copy out the list of sources
TAILQ_CONCAT(&cleanup_list, &state->ncs_src_queue, ns_control_link);
lck_mtx_unlock(&state->ncs_mtx);
while ((src = TAILQ_FIRST(&cleanup_list))) {
TAILQ_REMOVE(&cleanup_list, src, ns_control_link);
nstat_control_cleanup_source(NULL, src, FALSE);
}
lck_mtx_destroy(&state->ncs_mtx, nstat_lck_grp);
kheap_free(KHEAP_NET_STAT, state, sizeof(*state));
return 0;
}
static nstat_src_ref_t
nstat_control_next_src_ref(
nstat_control_state *state)
{
return ++state->ncs_next_srcref;
}
static errno_t
nstat_control_send_counts(
nstat_control_state *state,
nstat_src *src,
unsigned long long context,
u_int16_t hdr_flags,
int *gone)
{
nstat_msg_src_counts counts;
errno_t result = 0;
/* Some providers may not have any counts to send */
if (src->provider->nstat_counts == NULL) {
return 0;
}
bzero(&counts, sizeof(counts));
counts.hdr.type = NSTAT_MSG_TYPE_SRC_COUNTS;
counts.hdr.length = sizeof(counts);
counts.hdr.flags = hdr_flags;
counts.hdr.context = context;
counts.srcref = src->srcref;
counts.event_flags = 0;
if (src->provider->nstat_counts(src->cookie, &counts.counts, gone) == 0) {
if ((src->filter & NSTAT_FILTER_NOZEROBYTES) &&
counts.counts.nstat_rxbytes == 0 &&
counts.counts.nstat_txbytes == 0) {
result = EAGAIN;
} else {
result = ctl_enqueuedata(state->ncs_kctl,
state->ncs_unit, &counts, sizeof(counts),
CTL_DATA_EOR);
if (result != 0) {
nstat_stats.nstat_sendcountfailures += 1;
}
}
}
return result;
}
static errno_t
nstat_control_append_counts(
nstat_control_state *state,
nstat_src *src,
int *gone)
{
/* Some providers may not have any counts to send */
if (!src->provider->nstat_counts) {
return 0;
}
nstat_msg_src_counts counts;
bzero(&counts, sizeof(counts));
counts.hdr.type = NSTAT_MSG_TYPE_SRC_COUNTS;
counts.hdr.length = sizeof(counts);
counts.srcref = src->srcref;
counts.event_flags = 0;
errno_t result = 0;
result = src->provider->nstat_counts(src->cookie, &counts.counts, gone);
if (result != 0) {
return result;
}
if ((src->filter & NSTAT_FILTER_NOZEROBYTES) == NSTAT_FILTER_NOZEROBYTES &&
counts.counts.nstat_rxbytes == 0 && counts.counts.nstat_txbytes == 0) {
return EAGAIN;
}
return nstat_accumulate_msg(state, &counts.hdr, counts.hdr.length);
}
static int
nstat_control_send_description(
nstat_control_state *state,
nstat_src *src,
u_int64_t context,
u_int16_t hdr_flags)
{
// Provider doesn't support getting the descriptor? Done.
if (src->provider->nstat_descriptor_length == 0 ||
src->provider->nstat_copy_descriptor == NULL) {
return EOPNOTSUPP;
}
// Allocate storage for the descriptor message
mbuf_t msg;
unsigned int one = 1;
size_t size = offsetof(nstat_msg_src_description, data) + src->provider->nstat_descriptor_length;
assert(size <= MAX_NSTAT_MSG_HDR_LENGTH);
if (mbuf_allocpacket(MBUF_DONTWAIT, size, &one, &msg) != 0) {
return ENOMEM;
}
nstat_msg_src_description *desc = (nstat_msg_src_description*)mbuf_data(msg);
bzero(desc, size);
mbuf_setlen(msg, size);
mbuf_pkthdr_setlen(msg, mbuf_len(msg));
// Query the provider for the provider specific bits
errno_t result = src->provider->nstat_copy_descriptor(src->cookie, desc->data, src->provider->nstat_descriptor_length);
if (result != 0) {
mbuf_freem(msg);
return result;
}
desc->hdr.context = context;
desc->hdr.type = NSTAT_MSG_TYPE_SRC_DESC;
desc->hdr.length = (u_int16_t)size;
desc->hdr.flags = hdr_flags;
desc->srcref = src->srcref;
desc->event_flags = 0;
desc->provider = src->provider->nstat_provider_id;
result = ctl_enqueuembuf(state->ncs_kctl, state->ncs_unit, msg, CTL_DATA_EOR);
if (result != 0) {
nstat_stats.nstat_descriptionfailures += 1;
mbuf_freem(msg);
}
return result;
}
static errno_t
nstat_control_append_description(
nstat_control_state *state,
nstat_src *src)
{
size_t size = offsetof(nstat_msg_src_description, data) + src->provider->nstat_descriptor_length;
if (size > 512 || src->provider->nstat_descriptor_length == 0 ||
src->provider->nstat_copy_descriptor == NULL) {
return EOPNOTSUPP;
}
// Fill out a buffer on the stack, we will copy to the mbuf later
u_int64_t buffer[size / sizeof(u_int64_t) + 1]; // u_int64_t to ensure alignment
bzero(buffer, size);
nstat_msg_src_description *desc = (nstat_msg_src_description*)buffer;
desc->hdr.type = NSTAT_MSG_TYPE_SRC_DESC;
desc->hdr.length = (u_int16_t)size;
desc->srcref = src->srcref;
desc->event_flags = 0;
desc->provider = src->provider->nstat_provider_id;
errno_t result = 0;
// Fill in the description
// Query the provider for the provider specific bits
result = src->provider->nstat_copy_descriptor(src->cookie, desc->data,
src->provider->nstat_descriptor_length);
if (result != 0) {
return result;
}
return nstat_accumulate_msg(state, &desc->hdr, size);
}
static int
nstat_control_send_update(
nstat_control_state *state,
nstat_src *src,
u_int64_t context,
u_int64_t event,
u_int16_t hdr_flags,
int *gone)
{
// Provider doesn't support getting the descriptor or counts? Done.
if ((src->provider->nstat_descriptor_length == 0 ||
src->provider->nstat_copy_descriptor == NULL) &&
src->provider->nstat_counts == NULL) {
return EOPNOTSUPP;
}
// Allocate storage for the descriptor message
mbuf_t msg;
unsigned int one = 1;
size_t size = offsetof(nstat_msg_src_update, data) +
src->provider->nstat_descriptor_length;
assert(size <= MAX_NSTAT_MSG_HDR_LENGTH);
if (mbuf_allocpacket(MBUF_DONTWAIT, size, &one, &msg) != 0) {
return ENOMEM;
}
nstat_msg_src_update *desc = (nstat_msg_src_update*)mbuf_data(msg);
bzero(desc, size);
desc->hdr.context = context;
desc->hdr.type = NSTAT_MSG_TYPE_SRC_UPDATE;
desc->hdr.length = (u_int16_t)size;
desc->hdr.flags = hdr_flags;
desc->srcref = src->srcref;
desc->event_flags = event;
desc->provider = src->provider->nstat_provider_id;
mbuf_setlen(msg, size);
mbuf_pkthdr_setlen(msg, mbuf_len(msg));
errno_t result = 0;
if (src->provider->nstat_descriptor_length != 0 && src->provider->nstat_copy_descriptor) {
// Query the provider for the provider specific bits
result = src->provider->nstat_copy_descriptor(src->cookie, desc->data,
src->provider->nstat_descriptor_length);
if (result != 0) {
mbuf_freem(msg);
return result;
}
}
if (src->provider->nstat_counts) {
result = src->provider->nstat_counts(src->cookie, &desc->counts, gone);
if (result == 0) {
if ((src->filter & NSTAT_FILTER_NOZEROBYTES) == NSTAT_FILTER_NOZEROBYTES &&
desc->counts.nstat_rxbytes == 0 && desc->counts.nstat_txbytes == 0) {
result = EAGAIN;
} else {
result = ctl_enqueuembuf(state->ncs_kctl, state->ncs_unit, msg, CTL_DATA_EOR);
}
}
}
if (result != 0) {
nstat_stats.nstat_srcupatefailures += 1;
mbuf_freem(msg);
}
return result;
}
static errno_t
nstat_control_append_update(
nstat_control_state *state,
nstat_src *src,
int *gone)
{
size_t size = offsetof(nstat_msg_src_update, data) + src->provider->nstat_descriptor_length;
if (size > 512 || ((src->provider->nstat_descriptor_length == 0 ||
src->provider->nstat_copy_descriptor == NULL) &&
src->provider->nstat_counts == NULL)) {
return EOPNOTSUPP;
}
// Fill out a buffer on the stack, we will copy to the mbuf later
u_int64_t buffer[size / sizeof(u_int64_t) + 1]; // u_int64_t to ensure alignment
bzero(buffer, size);
nstat_msg_src_update *desc = (nstat_msg_src_update*)buffer;
desc->hdr.type = NSTAT_MSG_TYPE_SRC_UPDATE;
desc->hdr.length = (u_int16_t)size;
desc->srcref = src->srcref;
desc->event_flags = 0;
desc->provider = src->provider->nstat_provider_id;
errno_t result = 0;
// Fill in the description
if (src->provider->nstat_descriptor_length != 0 && src->provider->nstat_copy_descriptor) {
// Query the provider for the provider specific bits
result = src->provider->nstat_copy_descriptor(src->cookie, desc->data,
src->provider->nstat_descriptor_length);
if (result != 0) {
nstat_stats.nstat_copy_descriptor_failures++;
if (nstat_debug != 0) {
printf("%s: src->provider->nstat_copy_descriptor: %d\n", __func__, result);
}
return result;
}
}
if (src->provider->nstat_counts) {
result = src->provider->nstat_counts(src->cookie, &desc->counts, gone);
if (result != 0) {
nstat_stats.nstat_provider_counts_failures++;
if (nstat_debug != 0) {
printf("%s: src->provider->nstat_counts: %d\n", __func__, result);
}
return result;
}
if ((src->filter & NSTAT_FILTER_NOZEROBYTES) == NSTAT_FILTER_NOZEROBYTES &&
desc->counts.nstat_rxbytes == 0 && desc->counts.nstat_txbytes == 0) {
return EAGAIN;
}
}
return nstat_accumulate_msg(state, &desc->hdr, size);
}
static errno_t
nstat_control_send_removed(
nstat_control_state *state,
nstat_src *src)
{
nstat_msg_src_removed removed;
errno_t result;
bzero(&removed, sizeof(removed));
removed.hdr.type = NSTAT_MSG_TYPE_SRC_REMOVED;
removed.hdr.length = sizeof(removed);
removed.hdr.context = 0;
removed.srcref = src->srcref;
result = ctl_enqueuedata(state->ncs_kctl, state->ncs_unit, &removed,
sizeof(removed), CTL_DATA_EOR | CTL_DATA_CRIT);
if (result != 0) {
nstat_stats.nstat_msgremovedfailures += 1;
}
return result;
}
static errno_t
nstat_control_handle_add_request(
nstat_control_state *state,
mbuf_t m)
{
errno_t result;
// Verify the header fits in the first mbuf
if (mbuf_len(m) < offsetof(nstat_msg_add_src_req, param)) {
return EINVAL;
}
// Calculate the length of the parameter field
ssize_t paramlength = mbuf_pkthdr_len(m) - offsetof(nstat_msg_add_src_req, param);
if (paramlength < 0 || paramlength > 2 * 1024) {
return EINVAL;
}
nstat_provider *provider = NULL;
nstat_provider_cookie_t cookie = NULL;
nstat_msg_add_src_req *req = mbuf_data(m);
if (mbuf_pkthdr_len(m) > mbuf_len(m)) {
// parameter is too large, we need to make a contiguous copy
void *data = kheap_alloc(KHEAP_TEMP, paramlength, Z_WAITOK);
if (!data) {
return ENOMEM;
}
result = mbuf_copydata(m, offsetof(nstat_msg_add_src_req, param), paramlength, data);
if (result == 0) {
result = nstat_lookup_entry(req->provider, data, paramlength, &provider, &cookie);
}
kheap_free(KHEAP_TEMP, data, paramlength);
} else {
result = nstat_lookup_entry(req->provider, (void*)&req->param, paramlength, &provider, &cookie);
}
if (result != 0) {
return result;
}
result = nstat_control_source_add(req->hdr.context, state, provider, cookie);
if (result != 0) {
provider->nstat_release(cookie, 0);
}
return result;
}
static errno_t
nstat_set_provider_filter(
nstat_control_state *state,
nstat_msg_add_all_srcs *req)
{
nstat_provider_id_t provider_id = req->provider;
u_int32_t prev_ncs_watching = atomic_or_32_ov(&state->ncs_watching, (1 << provider_id));
if ((prev_ncs_watching & (1 << provider_id)) != 0) {
return EALREADY;
}
state->ncs_watching |= (1 << provider_id);
state->ncs_provider_filters[provider_id].npf_flags = req->filter;
state->ncs_provider_filters[provider_id].npf_events = req->events;
state->ncs_provider_filters[provider_id].npf_pid = req->target_pid;
uuid_copy(state->ncs_provider_filters[provider_id].npf_uuid, req->target_uuid);
return 0;
}
static errno_t
nstat_control_handle_add_all(
nstat_control_state *state,
mbuf_t m)
{
errno_t result = 0;
// Verify the header fits in the first mbuf
if (mbuf_len(m) < sizeof(nstat_msg_add_all_srcs)) {
return EINVAL;
}
nstat_msg_add_all_srcs *req = mbuf_data(m);
if (req->provider > NSTAT_PROVIDER_LAST) {
return ENOENT;
}
nstat_provider *provider = nstat_find_provider_by_id(req->provider);
if (!provider) {
return ENOENT;
}
if (provider->nstat_watcher_add == NULL) {
return ENOTSUP;
}
if (nstat_privcheck != 0) {
result = priv_check_cred(kauth_cred_get(),
PRIV_NET_PRIVILEGED_NETWORK_STATISTICS, 0);
if (result != 0) {
return result;
}
}
lck_mtx_lock(&state->ncs_mtx);
if (req->filter & NSTAT_FILTER_SUPPRESS_SRC_ADDED) {
// Suppression of source messages implicitly requires the use of update messages
state->ncs_flags |= NSTAT_FLAG_SUPPORTS_UPDATES;
}
lck_mtx_unlock(&state->ncs_mtx);
// rdar://problem/30301300 Different providers require different synchronization
// to ensure that a new entry does not get double counted due to being added prior
// to all current provider entries being added. Hence pass the provider the details
// in the original request for this to be applied atomically
result = provider->nstat_watcher_add(state, req);
if (result == 0) {
nstat_enqueue_success(req->hdr.context, state, 0);
}
return result;
}
static errno_t
nstat_control_source_add(
u_int64_t context,
nstat_control_state *state,
nstat_provider *provider,
nstat_provider_cookie_t cookie)
{
// Fill out source added message if appropriate
mbuf_t msg = NULL;
nstat_src_ref_t *srcrefp = NULL;
u_int64_t provider_filter_flagss =
state->ncs_provider_filters[provider->nstat_provider_id].npf_flags;
boolean_t tell_user =
((provider_filter_flagss & NSTAT_FILTER_SUPPRESS_SRC_ADDED) == 0);
u_int32_t src_filter =
(provider_filter_flagss & NSTAT_FILTER_PROVIDER_NOZEROBYTES)
? NSTAT_FILTER_NOZEROBYTES : 0;
if (provider_filter_flagss & NSTAT_FILTER_TCP_NO_EARLY_CLOSE) {
src_filter |= NSTAT_FILTER_TCP_NO_EARLY_CLOSE;
}
if (tell_user) {
unsigned int one = 1;
if (mbuf_allocpacket(MBUF_DONTWAIT, sizeof(nstat_msg_src_added),
&one, &msg) != 0) {
return ENOMEM;
}
mbuf_setlen(msg, sizeof(nstat_msg_src_added));
mbuf_pkthdr_setlen(msg, mbuf_len(msg));
nstat_msg_src_added *add = mbuf_data(msg);
bzero(add, sizeof(*add));
add->hdr.type = NSTAT_MSG_TYPE_SRC_ADDED;
assert(mbuf_len(msg) <= MAX_NSTAT_MSG_HDR_LENGTH);
add->hdr.length = (u_int16_t)mbuf_len(msg);
add->hdr.context = context;
add->provider = provider->nstat_provider_id;
srcrefp = &add->srcref;
}
// Allocate storage for the source
nstat_src *src = kheap_alloc(KHEAP_NET_STAT, sizeof(*src), Z_WAITOK);
if (src == NULL) {
if (msg) {
mbuf_freem(msg);
}
return ENOMEM;
}
// Fill in the source, including picking an unused source ref
lck_mtx_lock(&state->ncs_mtx);
src->srcref = nstat_control_next_src_ref(state);
if (srcrefp) {
*srcrefp = src->srcref;
}
if (state->ncs_flags & NSTAT_FLAG_CLEANUP || src->srcref == NSTAT_SRC_REF_INVALID) {
lck_mtx_unlock(&state->ncs_mtx);
kheap_free(KHEAP_NET_STAT, src, sizeof(*src));
if (msg) {
mbuf_freem(msg);
}
return EINVAL;
}
src->provider = provider;
src->cookie = cookie;
src->filter = src_filter;
src->seq = 0;
if (msg) {
// send the source added message if appropriate
errno_t result = ctl_enqueuembuf(state->ncs_kctl, state->ncs_unit, msg,
CTL_DATA_EOR);
if (result != 0) {
nstat_stats.nstat_srcaddedfailures += 1;
lck_mtx_unlock(&state->ncs_mtx);
kheap_free(KHEAP_NET_STAT, src, sizeof(*src));
mbuf_freem(msg);
return result;
}
}
// Put the source in the list
TAILQ_INSERT_HEAD(&state->ncs_src_queue, src, ns_control_link);
src->ns_control = state;
lck_mtx_unlock(&state->ncs_mtx);
return 0;
}
static errno_t
nstat_control_handle_remove_request(
nstat_control_state *state,
mbuf_t m)
{
nstat_src_ref_t srcref = NSTAT_SRC_REF_INVALID;
nstat_src *src;
if (mbuf_copydata(m, offsetof(nstat_msg_rem_src_req, srcref), sizeof(srcref), &srcref) != 0) {
return EINVAL;
}
lck_mtx_lock(&state->ncs_mtx);
// Remove this source as we look for it
TAILQ_FOREACH(src, &state->ncs_src_queue, ns_control_link)
{
if (src->srcref == srcref) {
break;
}
}
if (src) {
TAILQ_REMOVE(&state->ncs_src_queue, src, ns_control_link);
}
lck_mtx_unlock(&state->ncs_mtx);
if (src) {
nstat_control_cleanup_source(state, src, FALSE);
}
return src ? 0 : ENOENT;
}
static errno_t
nstat_control_handle_query_request(
nstat_control_state *state,
mbuf_t m)
{
// TBD: handle this from another thread so we can enqueue a lot of data
// As written, if a client requests query all, this function will be
// called from their send of the request message. We will attempt to write
// responses and succeed until the buffer fills up. Since the clients thread
// is blocked on send, it won't be reading unless the client has two threads
// using this socket, one for read and one for write. Two threads probably
// won't work with this code anyhow since we don't have proper locking in
// place yet.
tailq_head_nstat_src dead_list;
errno_t result = ENOENT;
nstat_msg_query_src_req req;
if (mbuf_copydata(m, 0, sizeof(req), &req) != 0) {
return EINVAL;
}
const boolean_t all_srcs = (req.srcref == NSTAT_SRC_REF_ALL);
TAILQ_INIT(&dead_list);
lck_mtx_lock(&state->ncs_mtx);
if (all_srcs) {
state->ncs_flags |= NSTAT_FLAG_REQCOUNTS;
}
nstat_src *src, *tmpsrc;
u_int64_t src_count = 0;
boolean_t partial = FALSE;
/*
* Error handling policy and sequence number generation is folded into
* nstat_control_begin_query.
*/
partial = nstat_control_begin_query(state, &req.hdr);
TAILQ_FOREACH_SAFE(src, &state->ncs_src_queue, ns_control_link, tmpsrc)
{
int gone = 0;
// XXX ignore IFACE types?
if (all_srcs || src->srcref == req.srcref) {
if (nstat_control_reporting_allowed(state, src)
&& (!partial || !all_srcs || src->seq != state->ncs_seq)) {
if (all_srcs &&
(req.hdr.flags & NSTAT_MSG_HDR_FLAG_SUPPORTS_AGGREGATE) != 0) {
result = nstat_control_append_counts(state, src, &gone);
} else {
result = nstat_control_send_counts(state, src, req.hdr.context, 0, &gone);
}
if (ENOMEM == result || ENOBUFS == result) {
/*
* If the counts message failed to
* enqueue then we should clear our flag so
* that a client doesn't miss anything on
* idle cleanup. We skip the "gone"
* processing in the hope that we may
* catch it another time.
*/
state->ncs_flags &= ~NSTAT_FLAG_REQCOUNTS;
break;
}
if (partial) {
/*
* We skip over hard errors and
* filtered sources.
*/
src->seq = state->ncs_seq;
src_count++;
}
}
}
if (gone) {
// send one last descriptor message so client may see last state
// If we can't send the notification now, it
// will be sent in the idle cleanup.
result = nstat_control_send_description(state, src, 0, 0);
if (result != 0) {
nstat_stats.nstat_control_send_description_failures++;
if (nstat_debug != 0) {
printf("%s - nstat_control_send_description() %d\n", __func__, result);
}
state->ncs_flags &= ~NSTAT_FLAG_REQCOUNTS;
break;
}
// pull src out of the list
TAILQ_REMOVE(&state->ncs_src_queue, src, ns_control_link);
TAILQ_INSERT_TAIL(&dead_list, src, ns_control_link);
}
if (all_srcs) {
if (src_count >= QUERY_CONTINUATION_SRC_COUNT) {
break;
}
} else if (req.srcref == src->srcref) {
break;
}
}
nstat_flush_accumulated_msgs(state);
u_int16_t flags = 0;
if (req.srcref == NSTAT_SRC_REF_ALL) {
flags = nstat_control_end_query(state, src, partial);
}
lck_mtx_unlock(&state->ncs_mtx);
/*
* If an error occurred enqueueing data, then allow the error to
* propagate to nstat_control_send. This way, the error is sent to
* user-level.
*/
if (all_srcs && ENOMEM != result && ENOBUFS != result) {
nstat_enqueue_success(req.hdr.context, state, flags);
result = 0;
}
while ((src = TAILQ_FIRST(&dead_list))) {
TAILQ_REMOVE(&dead_list, src, ns_control_link);
nstat_control_cleanup_source(state, src, FALSE);
}
return result;
}
static errno_t
nstat_control_handle_get_src_description(
nstat_control_state *state,
mbuf_t m)
{
nstat_msg_get_src_description req;
errno_t result = ENOENT;
nstat_src *src;
if (mbuf_copydata(m, 0, sizeof(req), &req) != 0) {
return EINVAL;
}
lck_mtx_lock(&state->ncs_mtx);
u_int64_t src_count = 0;
boolean_t partial = FALSE;
const boolean_t all_srcs = (req.srcref == NSTAT_SRC_REF_ALL);
/*
* Error handling policy and sequence number generation is folded into
* nstat_control_begin_query.
*/
partial = nstat_control_begin_query(state, &req.hdr);
TAILQ_FOREACH(src, &state->ncs_src_queue, ns_control_link)
{
if (all_srcs || src->srcref == req.srcref) {
if (nstat_control_reporting_allowed(state, src)
&& (!all_srcs || !partial || src->seq != state->ncs_seq)) {
if ((req.hdr.flags & NSTAT_MSG_HDR_FLAG_SUPPORTS_AGGREGATE) != 0 && all_srcs) {
result = nstat_control_append_description(state, src);
} else {
result = nstat_control_send_description(state, src, req.hdr.context, 0);
}
if (ENOMEM == result || ENOBUFS == result) {
/*
* If the description message failed to
* enqueue then we give up for now.
*/
break;
}
if (partial) {
/*
* Note, we skip over hard errors and
* filtered sources.
*/
src->seq = state->ncs_seq;
src_count++;
if (src_count >= QUERY_CONTINUATION_SRC_COUNT) {
break;
}
}
}
if (!all_srcs) {
break;
}
}
}
nstat_flush_accumulated_msgs(state);
u_int16_t flags = 0;
if (req.srcref == NSTAT_SRC_REF_ALL) {
flags = nstat_control_end_query(state, src, partial);
}
lck_mtx_unlock(&state->ncs_mtx);
/*
* If an error occurred enqueueing data, then allow the error to
* propagate to nstat_control_send. This way, the error is sent to
* user-level.
*/
if (all_srcs && ENOMEM != result && ENOBUFS != result) {
nstat_enqueue_success(req.hdr.context, state, flags);
result = 0;
}
return result;
}
static errno_t
nstat_control_handle_set_filter(
nstat_control_state *state,
mbuf_t m)
{
nstat_msg_set_filter req;
nstat_src *src;
if (mbuf_copydata(m, 0, sizeof(req), &req) != 0) {
return EINVAL;
}
if (req.srcref == NSTAT_SRC_REF_ALL ||
req.srcref == NSTAT_SRC_REF_INVALID) {
return EINVAL;
}
lck_mtx_lock(&state->ncs_mtx);
TAILQ_FOREACH(src, &state->ncs_src_queue, ns_control_link)
{
if (req.srcref == src->srcref) {
src->filter = req.filter;
break;
}
}
lck_mtx_unlock(&state->ncs_mtx);
if (src == NULL) {
return ENOENT;
}
return 0;
}
static void
nstat_send_error(
nstat_control_state *state,
u_int64_t context,
u_int32_t error)
{
errno_t result;
struct nstat_msg_error err;
bzero(&err, sizeof(err));
err.hdr.type = NSTAT_MSG_TYPE_ERROR;
err.hdr.length = sizeof(err);
err.hdr.context = context;
err.error = error;
result = ctl_enqueuedata(state->ncs_kctl, state->ncs_unit, &err,
sizeof(err), CTL_DATA_EOR | CTL_DATA_CRIT);
if (result != 0) {
nstat_stats.nstat_msgerrorfailures++;
}
}
static boolean_t
nstat_control_begin_query(
nstat_control_state *state,
const nstat_msg_hdr *hdrp)
{
boolean_t partial = FALSE;
if (hdrp->flags & NSTAT_MSG_HDR_FLAG_CONTINUATION) {
/* A partial query all has been requested. */
partial = TRUE;
if (state->ncs_context != hdrp->context) {
if (state->ncs_context != 0) {
nstat_send_error(state, state->ncs_context, EAGAIN);
}
/* Initialize state for a partial query all. */
state->ncs_context = hdrp->context;
state->ncs_seq++;
}
}
return partial;
}
static u_int16_t
nstat_control_end_query(
nstat_control_state *state,
nstat_src *last_src,
boolean_t partial)
{
u_int16_t flags = 0;
if (last_src == NULL || !partial) {
/*
* We iterated through the entire srcs list or exited early
* from the loop when a partial update was not requested (an
* error occurred), so clear context to indicate internally
* that the query is finished.
*/
state->ncs_context = 0;
} else {
/*
* Indicate to userlevel to make another partial request as
* there are still sources left to be reported.
*/
flags |= NSTAT_MSG_HDR_FLAG_CONTINUATION;
}
return flags;
}
static errno_t
nstat_control_handle_get_update(
nstat_control_state *state,
mbuf_t m)
{
nstat_msg_query_src_req req;
if (mbuf_copydata(m, 0, sizeof(req), &req) != 0) {
return EINVAL;
}
lck_mtx_lock(&state->ncs_mtx);
state->ncs_flags |= NSTAT_FLAG_SUPPORTS_UPDATES;
errno_t result = ENOENT;
nstat_src *src, *tmpsrc;
tailq_head_nstat_src dead_list;
u_int64_t src_count = 0;
boolean_t partial = FALSE;
TAILQ_INIT(&dead_list);
/*
* Error handling policy and sequence number generation is folded into
* nstat_control_begin_query.
*/
partial = nstat_control_begin_query(state, &req.hdr);
TAILQ_FOREACH_SAFE(src, &state->ncs_src_queue, ns_control_link, tmpsrc)
{
int gone;
gone = 0;
if (nstat_control_reporting_allowed(state, src)) {
/* skip this source if it has the current state
* sequence number as it's already been reported in
* this query-all partial sequence. */
if (req.srcref == NSTAT_SRC_REF_ALL
&& (FALSE == partial || src->seq != state->ncs_seq)) {
result = nstat_control_append_update(state, src, &gone);
if (ENOMEM == result || ENOBUFS == result) {
/*
* If the update message failed to
* enqueue then give up.
*/
break;
}
if (partial) {
/*
* We skip over hard errors and
* filtered sources.
*/
src->seq = state->ncs_seq;
src_count++;
}
} else if (src->srcref == req.srcref) {
result = nstat_control_send_update(state, src, req.hdr.context, 0, 0, &gone);
}
}
if (gone) {
// pull src out of the list
TAILQ_REMOVE(&state->ncs_src_queue, src, ns_control_link);
TAILQ_INSERT_TAIL(&dead_list, src, ns_control_link);
}
if (req.srcref != NSTAT_SRC_REF_ALL && req.srcref == src->srcref) {
break;
}
if (src_count >= QUERY_CONTINUATION_SRC_COUNT) {
break;
}
}
nstat_flush_accumulated_msgs(state);
u_int16_t flags = 0;
if (req.srcref == NSTAT_SRC_REF_ALL) {
flags = nstat_control_end_query(state, src, partial);
}
lck_mtx_unlock(&state->ncs_mtx);
/*
* If an error occurred enqueueing data, then allow the error to
* propagate to nstat_control_send. This way, the error is sent to
* user-level.
*/
if (req.srcref == NSTAT_SRC_REF_ALL && ENOMEM != result && ENOBUFS != result) {
nstat_enqueue_success(req.hdr.context, state, flags);
result = 0;
}
while ((src = TAILQ_FIRST(&dead_list))) {
TAILQ_REMOVE(&dead_list, src, ns_control_link);
// release src and send notification
nstat_control_cleanup_source(state, src, FALSE);
}
return result;
}
static errno_t
nstat_control_handle_subscribe_sysinfo(
nstat_control_state *state)
{
errno_t result = priv_check_cred(kauth_cred_get(), PRIV_NET_PRIVILEGED_NETWORK_STATISTICS, 0);
if (result != 0) {
return result;
}
lck_mtx_lock(&state->ncs_mtx);
state->ncs_flags |= NSTAT_FLAG_SYSINFO_SUBSCRIBED;
lck_mtx_unlock(&state->ncs_mtx);
return 0;
}
static errno_t
nstat_control_send(
kern_ctl_ref kctl,
u_int32_t unit,
void *uinfo,
mbuf_t m,
__unused int flags)
{
nstat_control_state *state = (nstat_control_state*)uinfo;
struct nstat_msg_hdr *hdr;
struct nstat_msg_hdr storage;
errno_t result = 0;
if (mbuf_pkthdr_len(m) < sizeof(*hdr)) {
// Is this the right thing to do?
mbuf_freem(m);
return EINVAL;
}
if (mbuf_len(m) >= sizeof(*hdr)) {
hdr = mbuf_data(m);
} else {
mbuf_copydata(m, 0, sizeof(storage), &storage);
hdr = &storage;
}
// Legacy clients may not set the length
// Those clients are likely not setting the flags either
// Fix everything up so old clients continue to work
if (hdr->length != mbuf_pkthdr_len(m)) {
hdr->flags = 0;
assert(mbuf_pkthdr_len(m) <= MAX_NSTAT_MSG_HDR_LENGTH);
hdr->length = (u_int16_t)mbuf_pkthdr_len(m);
if (hdr == &storage) {
mbuf_copyback(m, 0, sizeof(*hdr), hdr, MBUF_DONTWAIT);
}
}
switch (hdr->type) {
case NSTAT_MSG_TYPE_ADD_SRC:
result = nstat_control_handle_add_request(state, m);
break;
case NSTAT_MSG_TYPE_ADD_ALL_SRCS:
result = nstat_control_handle_add_all(state, m);
break;
case NSTAT_MSG_TYPE_REM_SRC:
result = nstat_control_handle_remove_request(state, m);
break;
case NSTAT_MSG_TYPE_QUERY_SRC:
result = nstat_control_handle_query_request(state, m);
break;
case NSTAT_MSG_TYPE_GET_SRC_DESC:
result = nstat_control_handle_get_src_description(state, m);
break;
case NSTAT_MSG_TYPE_SET_FILTER:
result = nstat_control_handle_set_filter(state, m);
break;
case NSTAT_MSG_TYPE_GET_UPDATE:
result = nstat_control_handle_get_update(state, m);
break;
case NSTAT_MSG_TYPE_SUBSCRIBE_SYSINFO:
result = nstat_control_handle_subscribe_sysinfo(state);
break;
default:
result = EINVAL;
break;
}
if (result != 0) {
struct nstat_msg_error err;
bzero(&err, sizeof(err));
err.hdr.type = NSTAT_MSG_TYPE_ERROR;
err.hdr.length = (u_int16_t)(sizeof(err) + mbuf_pkthdr_len(m));
err.hdr.context = hdr->context;
err.error = result;
if (mbuf_prepend(&m, sizeof(err), MBUF_DONTWAIT) == 0 &&
mbuf_copyback(m, 0, sizeof(err), &err, MBUF_DONTWAIT) == 0) {
result = ctl_enqueuembuf(kctl, unit, m, CTL_DATA_EOR | CTL_DATA_CRIT);
if (result != 0) {
mbuf_freem(m);
}
m = NULL;
}
if (result != 0) {
// Unable to prepend the error to the request - just send the error
err.hdr.length = sizeof(err);
result = ctl_enqueuedata(kctl, unit, &err, sizeof(err),
CTL_DATA_EOR | CTL_DATA_CRIT);
if (result != 0) {
nstat_stats.nstat_msgerrorfailures += 1;
}
}
nstat_stats.nstat_handle_msg_failures += 1;
}
if (m) {
mbuf_freem(m);
}
return result;
}
static int
tcp_progress_indicators_for_interface(unsigned int ifindex, uint64_t recentflow_maxduration, uint16_t filter_flags, struct xtcpprogress_indicators *indicators)
{
int error = 0;
struct inpcb *inp;
uint64_t min_recent_start_time;
min_recent_start_time = mach_continuous_time() - recentflow_maxduration;
bzero(indicators, sizeof(*indicators));
lck_rw_lock_shared(tcbinfo.ipi_lock);
/*
* For progress indicators we don't need to special case TCP to collect time wait connections
*/
LIST_FOREACH(inp, tcbinfo.ipi_listhead, inp_list)
{
struct tcpcb *tp = intotcpcb(inp);
if (tp && inp->inp_last_outifp &&
inp->inp_last_outifp->if_index == ifindex &&
inp->inp_state != INPCB_STATE_DEAD &&
((filter_flags == 0) ||
((filter_flags & NSTAT_IFNET_IS_NON_LOCAL) && !(tp->t_flags & TF_LOCAL)) ||
((filter_flags & NSTAT_IFNET_IS_LOCAL) && (tp->t_flags & TF_LOCAL)))) {
struct tcp_conn_status connstatus;
indicators->xp_numflows++;
tcp_get_connectivity_status(tp, &connstatus);
if (connstatus.write_probe_failed) {
indicators->xp_write_probe_fails++;
}
if (connstatus.read_probe_failed) {
indicators->xp_read_probe_fails++;
}
if (connstatus.conn_probe_failed) {
indicators->xp_conn_probe_fails++;
}
if (inp->inp_start_timestamp > min_recent_start_time) {
uint64_t flow_count;
indicators->xp_recentflows++;
atomic_get_64(flow_count, &inp->inp_stat->rxbytes);
indicators->xp_recentflows_rxbytes += flow_count;
atomic_get_64(flow_count, &inp->inp_stat->txbytes);
indicators->xp_recentflows_txbytes += flow_count;
indicators->xp_recentflows_rxooo += tp->t_stat.rxoutoforderbytes;
indicators->xp_recentflows_rxdup += tp->t_stat.rxduplicatebytes;
indicators->xp_recentflows_retx += tp->t_stat.txretransmitbytes;
if (tp->snd_max - tp->snd_una) {
indicators->xp_recentflows_unacked++;
}
}
}
}
lck_rw_done(tcbinfo.ipi_lock);
return error;
}
__private_extern__ int
ntstat_tcp_progress_indicators(struct sysctl_req *req)
{
struct xtcpprogress_indicators indicators = {};
int error = 0;
struct tcpprogressreq requested;
if (priv_check_cred(kauth_cred_get(), PRIV_NET_PRIVILEGED_NETWORK_STATISTICS, 0) != 0) {
return EACCES;
}
if (req->newptr == USER_ADDR_NULL) {
return EINVAL;
}
if (req->newlen < sizeof(req)) {
return EINVAL;
}
error = SYSCTL_IN(req, &requested, sizeof(requested));
if (error != 0) {
return error;
}
error = tcp_progress_indicators_for_interface((unsigned int)requested.ifindex, requested.recentflow_maxduration, (uint16_t)requested.filter_flags, &indicators);
if (error != 0) {
return error;
}
error = SYSCTL_OUT(req, &indicators, sizeof(indicators));
return error;
}
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