--- /dev/null
+++ b/ath/ath_wprobe.c
-@@ -0,0 +1,392 @@
+@@ -0,0 +1,433 @@
+#include <net80211/ieee80211_node.h>
+#include <linux/wprobe.h>
+
+ if ((rate < 0) || (rate >= rt->rateCount))
+ return -1;
+
-+ return rt->info[rate].rateKbps / 10;
++ return rt->info[rate].rateKbps;
+}
+
+static void
++ath_wprobe_report_rx(struct ieee80211vap *vap, struct ath_rx_status *rs, struct sk_buff *skb)
++{
++ const struct ieee80211_frame *wh = (struct ieee80211_frame *)skb->data;
++ struct wprobe_wlan_hdr hdr;
++ struct ath_vap *avp;
++ int hdrsize;
++
++ if (wprobe_disabled())
++ return;
++
++ avp = ATH_VAP(vap);
++ avp->av_rxframes++;
++ if (wh->i_fc[0] == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
++ avp->av_rxprobereq++;
++
++ memset(&hdr, 0, sizeof(hdr));
++ hdr.len = skb->len;
++ hdr.snr = rs->rs_rssi;
++ hdr.type = WPROBE_PKT_RX;
++ if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL)
++ hdrsize = sizeof(struct ieee80211_ctlframe_addr2);
++ else
++ hdrsize = ieee80211_hdrsize(skb->data);
++ wprobe_add_frame(&avp->av_wpif, &hdr, skb->data, hdrsize + 0x42);
++}
++
++
++static void
+ath_node_sample_rx(struct ieee80211_node *ni, struct ath_rx_status *rs)
+{
+ struct ath_node *an = ATH_NODE(ni);
+}
+
+static void
-+ath_node_sample_tx(struct ieee80211_node *ni, struct ath_tx_status *ts, int len)
++ath_wprobe_report_tx(struct ieee80211vap *vap, struct ath_tx_status *ts, struct sk_buff *skb)
++{
++ const struct ieee80211_frame *wh = (struct ieee80211_frame *)skb->data;
++ struct wprobe_wlan_hdr hdr;
++ struct ath_vap *avp;
++ int hdrsize;
++
++ if (wprobe_disabled())
++ return;
++
++ avp = ATH_VAP(vap);
++
++ memset(&hdr, 0, sizeof(hdr));
++ hdr.len = skb->len;
++ hdr.snr = ts->ts_rssi;
++ hdr.type = WPROBE_PKT_TX;
++ if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL)
++ hdrsize = sizeof(struct ieee80211_ctlframe_addr2);
++ else
++ hdrsize = ieee80211_hdrsize(skb->data);
++ wprobe_add_frame(&avp->av_wpif, &hdr, skb->data, hdrsize + 0x42);
++}
++
++
++
++static void
++ath_node_sample_tx(struct ieee80211_node *ni, struct ath_tx_status *ts, struct sk_buff *skb)
+{
+ struct ath_node *an = ATH_NODE(ni);
+ struct ieee80211vap *vap = ni->ni_vap;
+ struct wprobe_value *v = l->val;
+ unsigned long flags;
+ int rate, rexmit_counter;
++ int len = skb->len;
+
+ if (wprobe_disabled() || !an->an_wplink_active || !l->val)
+ return;
+
++ ath_wprobe_report_tx(vap, ts, skb);
+ rate = ath_lookup_rateval(ni, ts->ts_rate);
+
+ spin_lock_irqsave(&l->iface->lock, flags);
+}
+
+static void
-+ath_wprobe_report_rx(struct ieee80211vap *vap, struct sk_buff *skb)
-+{
-+ struct ieee80211_frame *wh = (struct ieee80211_frame *)skb->data;
-+ struct ath_vap *avp;
-+
-+ if (wprobe_disabled())
-+ return;
-+
-+ avp = ATH_VAP(vap);
-+ avp->av_rxframes++;
-+ if (wh->i_fc[0] == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
-+ avp->av_rxprobereq++;
-+}
-+
-+static void
+ath_wprobe_node_join(struct ieee80211vap *vap, struct ieee80211_node *ni)
+{
+ struct wprobe_iface *dev;
}
ATH_RSSI_LPF(ATH_NODE(ni)->an_avgrssi, rs->rs_rssi);
+ ath_node_sample_rx(ni, rs);
-+ ath_wprobe_report_rx(ni->ni_vap, skb);
++ ath_wprobe_report_rx(ni->ni_vap, rs, skb);
type = ieee80211_input(ni->ni_vap, ni, skb, rs->rs_rssi, bf->bf_tsf);
ieee80211_unref_node(&ni);
} else {
vap = ieee80211_find_rxvap(ic, wh->i_addr1);
- if (vap)
+ if (vap) {
-+ ath_wprobe_report_rx(vap, skb);
++ ath_wprobe_report_rx(vap, rs, skb);
ni = ieee80211_find_rxnode(ic, vap, wh);
- else
+ } else {
+ TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
-+ ath_wprobe_report_rx(vap, skb);
++ ath_wprobe_report_rx(vap, rs, skb);
+ }
+ vap = NULL;
ni = NULL;
sc->sc_stats.ast_tx_rssi = ts->ts_rssi;
ATH_RSSI_LPF(an->an_halstats.ns_avgtxrssi,
ts->ts_rssi);
-+ ath_node_sample_tx(&an->an_node, ts, bf->bf_skb->len);
++ ath_node_sample_tx(&an->an_node, ts, bf->bf_skb);
if (bf->bf_skb->priority == WME_AC_VO ||
bf->bf_skb->priority == WME_AC_VI)
ni->ni_ic->ic_wme.wme_hipri_traffic++;
A module that exports measurement data from wireless driver to user space
endef
-define Package/wprobe-info
+define Package/wprobe-util
SECTION:=net
CATEGORY:=Network
DEPENDS:=+kmod-wprobe +libnl-tiny
TITLE:=Wireless measurement utility
endef
-define Package/wprobe-info/description
- wprobe-info uses the wprobe kernel module to query
+define Package/wprobe-util/description
+ wprobe-util uses the wprobe kernel module to query
wireless driver measurement data from an interface
endef
define Package/wprobe-export
SECTION:=net
CATEGORY:=Network
- DEPENDS:=+wprobe-info
+ DEPENDS:=+wprobe-util
TITLE:=Wireless measurement data exporter
endef
CFLAGS="$(TARGET_CFLAGS)" \
CPPFLAGS="$(TARGET_CPPFLAGS) -I$(PKG_BUILD_DIR)/kernel" \
LDFLAGS="$(TARGET_LDFLAGS)" \
+ HOST_OS=Linux \
LIBNL="-lnl-tiny"
endef
$(CP) $(PKG_BUILD_DIR)/kernel/linux $(1)/usr/include/wprobe
endef
-define Package/wprobe-info/install
+define Package/wprobe-util/install
$(INSTALL_DIR) $(1)/sbin
- $(INSTALL_BIN) $(PKG_BUILD_DIR)/user/wprobe-info $(1)/sbin/
+ $(INSTALL_BIN) $(PKG_BUILD_DIR)/user/wprobe-util $(1)/sbin/
endef
define Package/wprobe-export/install
endef
$(eval $(call KernelPackage,wprobe))
-$(eval $(call BuildPackage,wprobe-info))
+$(eval $(call BuildPackage,wprobe-util))
$(eval $(call BuildPackage,wprobe-export))
--- /dev/null
+HOST_OS=$(shell uname)
+
+CC=gcc
+AR=ar
+RANLIB=ranlib
+
+WFLAGS = -Wall -Werror
+CFLAGS?=-O2
+CPPFLAGS=
+LDFLAGS=
+LIBS=
+
+include ../Makefile.inc
+CPPFLAGS += -I../kernel -I../user
+
wprobe-export: wprobe-export.c
$(CC) $(CPPFLAGS) $(CFLAGS) -o $@ $^ $(LDFLAGS) $(LIBS)
return -1;
}
- dev = wprobe_get_dev(ifname);
+ dev = wprobe_get_auto(ifname);
if (!dev || (list_empty(&dev->global_attr) && list_empty(&dev->link_attr))) {
fprintf(stderr, "Cannot connect to wprobe on interface '%s'\n", ifname);
return -1;
--- /dev/null
+To compile pfc you need at least libpcap version 1.0, as it requires proper radiotap header support
--- /dev/null
+#!/usr/bin/perl
+use strict;
+
+# helpers for custom packet format
+# bytes 0-7 are used by a dummy radiotap header
+my $WLAN_LEN = "radio[8:2]";
+my $SNR = "radio[10:1]";
+my $DEFAULT = undef;
+
+my $MAGIC = "WPFF";
+my $VERSION = 1; # filter binary format version
+my $HDRLEN = 3; # assumed storage space for custom fields
+
+my $output = "filter.bin";
+my $config = {
+ "packetsize" => [
+ [ "small", "$WLAN_LEN < 250" ],
+ [ "medium", "$WLAN_LEN < 800" ],
+ [ "big", $DEFAULT ],
+ ],
+ "snr" => [
+ [ "low", "$SNR < 10" ],
+ [ "medium", "$SNR < 20" ],
+ [ "high", $DEFAULT ],
+ ],
+ "type" => [
+ [ "beacon", "type mgt subtype beacon" ],
+ [ "data", "type data subtype data" ],
+ [ "qosdata", "type data subtype qos-data" ],
+ [ "other", "$DEFAULT" ]
+ ]
+};
+
+sub escape_q($) {
+ my $str = shift;
+ $str =~ s/'/'\\''/g;
+ return $str;
+}
+
+my $GROUPS = scalar(keys %$config);
+open OUTPUT, ">$output" or die "Cannot open output file: $!\n";
+print OUTPUT pack("a4CCn", $MAGIC, $VERSION, $HDRLEN, $GROUPS);
+
+foreach my $groupname (keys %$config) {
+ my $default = 0;
+ my $group = $config->{$groupname};
+ print OUTPUT pack("a32N", $groupname, scalar(@$group));
+ foreach my $filter (@$group) {
+ if (!$filter->[1]) {
+ $default > 0 and print "Cannot add more than one default filter per group: $groupname -> ".$filter->[0]."\n";
+ print OUTPUT pack("a32N", $filter->[0], 0);
+ $default++;
+ } else {
+ open FILTER, "./pfc '".escape_q($filter->[0])."' '".escape_q($filter->[1])."' |"
+ or die "Failed to run filter command for '".$filter->[0]."': $!\n";
+ while (<FILTER>) {
+ print OUTPUT $_;
+ }
+ close FILTER;
+ $? and die "Filter '".$filter->[0]."' did not compile.\n";
+ }
+ }
+}
--- /dev/null
+#include <arpa/inet.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <string.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include <pcap.h>
+#include <pcap-bpf.h>
+
+struct wprobe_filter_hdr {
+ char name[32];
+ uint32_t len;
+} hdr;
+
+int main (int argc, char ** argv)
+{
+ struct bpf_program filter;
+ pcap_t *pc;
+ int i;
+
+ if (argc != 3)
+ {
+ fprintf(stderr, "Usage: %s <name> <expression>\n", argv[0]);
+ return 1;
+ }
+
+ pc = pcap_open_dead(DLT_IEEE802_11_RADIO, 256);
+ if (pcap_compile(pc, &filter, argv[2], 1, 0) != 0)
+ {
+ pcap_perror(pc, argv[0]);
+ exit(1);
+ }
+
+ /* fix up for linux */
+ for (i = 0; i < filter.bf_len; i++) {
+ struct bpf_insn *bi = &filter.bf_insns[i];
+ switch(BPF_CLASS(bi->code)) {
+ case BPF_RET:
+ if (BPF_MODE(bi->code) == BPF_K) {
+ if (bi->k != 0)
+ bi->k = 65535;
+ }
+ break;
+ }
+ bi->code = ntohs(bi->code);
+ bi->k = ntohl(bi->k);
+ }
+
+ memset(&hdr, 0, sizeof(hdr));
+ strncpy(hdr.name, argv[1], sizeof(hdr.name));
+ hdr.len = htonl(filter.bf_len);
+ fwrite(&hdr, sizeof(hdr), 1, stdout);
+ fwrite(filter.bf_insns, 8, filter.bf_len, stdout);
+ fflush(stdout);
+
+ return 0;
+}
#include <linux/module.h>
#include <linux/list.h>
#include <linux/timer.h>
+#include <linux/filter.h>
#include <net/genetlink.h>
#endif
WPROBE_ATTR_SAMPLES_MAX,
WPROBE_ATTR_SAMPLES_SCALE_M,
WPROBE_ATTR_SAMPLES_SCALE_D,
+ WPROBE_ATTR_FILTER,
+
+ WPROBE_ATTR_FILTER_GROUP,
+ WPROBE_ATTR_RXCOUNT,
+ WPROBE_ATTR_TXCOUNT,
WPROBE_ATTR_LAST
};
* @WPROBE_CMD_SET_FLAGS: set global/link flags
* @WPROBE_CMD_MEASURE: take a snapshot of the current data
* @WPROBE_CMD_GET_LINKS: get a list of links
+ * @WPROBE_CMD_CONFIG: set config options
+ * @WPROBE_CMD_GET_FILTER: get counters for active filters
*
* @WPROBE_CMD_LAST: unused
*
WPROBE_CMD_MEASURE,
WPROBE_CMD_GET_LINKS,
WPROBE_CMD_CONFIG,
+ WPROBE_CMD_GET_FILTER,
WPROBE_CMD_LAST
};
/**
* enum wprobe_flags: flags for wprobe links and items
* @WPROBE_F_KEEPSTAT: keep statistics for this link/device
- * @WPROBE_F_RESET: reset statistics now (used only in WPROBE_CMD_SET_LINK)
+ * @WPROBE_F_RESET: reset statistics now
* @WPROBE_F_NEWDATA: used to indicate that a value has been updated
*/
enum wprobe_flags {
struct wprobe_link;
struct wprobe_item;
struct wprobe_source;
+struct wprobe_value;
/**
* struct wprobe_link - data structure describing a wireless link
char addr[ETH_ALEN];
u32 flags;
void *priv;
- void *val;
+ struct wprobe_value *val;
};
/**
u64 scale_timestamp;
};
+struct wprobe_filter_item_hdr {
+ char name[32];
+ __be32 n_items;
+} __attribute__((packed));
+
+struct wprobe_filter_item {
+ struct wprobe_filter_item_hdr hdr;
+ struct sock_filter filter[];
+} __attribute__((packed));
+
+struct wprobe_filter_counter {
+ u64 tx;
+ u64 rx;
+};
+
+struct wprobe_filter_group {
+ const char *name;
+ int n_items;
+ struct wprobe_filter_item **items;
+ struct wprobe_filter_counter *counters;
+};
+
+struct wprobe_filter_hdr {
+ __u8 magic[4];
+ __u8 version;
+ __u8 hdrlen;
+ __u16 n_groups;
+} __attribute__((packed));
+
+struct wprobe_filter {
+ spinlock_t lock;
+ struct sk_buff *skb;
+ void *data;
+ int n_groups;
+ int hdrlen;
+ struct wprobe_filter_item **items;
+ struct wprobe_filter_counter *counters;
+ struct wprobe_filter_group groups[];
+};
+
+enum {
+ WPROBE_PKT_RX = 0x00,
+ WPROBE_PKT_TX = 0x10,
+};
+
+struct wprobe_wlan_hdr {
+ u16 len;
+ u8 snr;
+ u8 type;
+} __attribute__((packed));
+
+
/**
* struct wprobe_source - data structure describing a wireless interface
*
struct list_head list;
struct list_head links;
spinlock_t lock;
- void *val;
- void *query_val;
+ struct wprobe_value *val;
+ struct wprobe_value *query_val;
+ struct wprobe_filter *active_filter;
u32 measure_interval;
struct timer_list measure_timer;
u32 scale_d;
};
+
#define WPROBE_FILL_BEGIN(_ptr, _list) do { \
struct wprobe_value *__val = (_ptr); \
const struct wprobe_item *__item = _list; \
*/
extern void __weak wprobe_update_stats(struct wprobe_iface *dev, struct wprobe_link *l);
+/**
+ * wprobe_add_frame: add frame for layer 2 analysis
+ * @dev: wprobe_iface structure describing the interface
+ * @hdr: metadata for the frame
+ * @data: 802.11 header pointer
+ * @len: length of the 802.11 header
+ */
+extern int __weak wprobe_add_frame(struct wprobe_iface *dev, const struct wprobe_wlan_hdr *hdr, void *data, int len);
+
#endif /* __KERNEL__ */
#endif
#endif
#define WPROBE_MIN_INTERVAL 100 /* minimum measurement interval in msecs */
+#define WPROBE_MAX_FILTER_SIZE 1024
+#define WPROBE_MAX_FRAME_SIZE 1900
static struct list_head wprobe_if;
static spinlock_t wprobe_lock;
.maxattr = WPROBE_ATTR_LAST,
};
+/* fake radiotap header */
+struct wprobe_rtap_hdr {
+ __u8 version;
+ __u8 padding;
+ __le16 len;
+ __le32 present;
+};
+
static void wprobe_update_stats(struct wprobe_iface *dev, struct wprobe_link *l);
static int wprobe_sync_data(struct wprobe_iface *dev, struct wprobe_link *l, bool query);
+static void wprobe_free_filter(struct wprobe_filter *f);
int
wprobe_add_link(struct wprobe_iface *s, struct wprobe_link *l, const char *addr)
INIT_LIST_HEAD(&s->links);
setup_timer(&s->measure_timer, wprobe_measure_timer, (unsigned long) s);
- vsize = max(s->n_link_items, s->n_global_items);
- s->val = kzalloc(sizeof(struct wprobe_value) * vsize, GFP_ATOMIC);
+ s->val = kzalloc(sizeof(struct wprobe_value) * s->n_global_items, GFP_ATOMIC);
if (!s->val)
goto error;
+ vsize = max(s->n_link_items, s->n_global_items);
s->query_val = kzalloc(sizeof(struct wprobe_value) * vsize, GFP_ATOMIC);
if (!s->query_val)
goto error;
kfree(s->val);
kfree(s->query_val);
+ if (s->active_filter)
+ wprobe_free_filter(s->active_filter);
}
EXPORT_SYMBOL(wprobe_remove_iface);
return dev;
}
+int
+wprobe_add_frame(struct wprobe_iface *dev, const struct wprobe_wlan_hdr *hdr, void *data, int len)
+{
+ struct wprobe_filter *f;
+ struct sk_buff *skb;
+ unsigned long flags;
+ int i, j;
+
+ rcu_read_lock();
+ f = rcu_dereference(dev->active_filter);
+ if (!f)
+ goto out;
+
+ spin_lock_irqsave(&f->lock, flags);
+
+ skb = f->skb;
+ skb->len = sizeof(struct wprobe_rtap_hdr);
+ skb->tail = skb->data + skb->len;
+ if (len + skb->len > WPROBE_MAX_FRAME_SIZE)
+ len = WPROBE_MAX_FRAME_SIZE - skb->len;
+
+ memcpy(skb_put(skb, f->hdrlen), hdr, sizeof(struct wprobe_wlan_hdr));
+ memcpy(skb_put(skb, len), data, len);
+
+ for(i = 0; i < f->n_groups; i++) {
+ struct wprobe_filter_group *fg = &f->groups[i];
+ bool found = false;
+ int def = -1;
+
+ for (j = 0; j < fg->n_items; j++) {
+ struct wprobe_filter_item *fi = fg->items[j];
+
+ if (!fi->hdr.n_items) {
+ def = j;
+ continue;
+ }
+ if (sk_run_filter(skb, fi->filter, fi->hdr.n_items) == 0)
+ continue;
+
+ found = true;
+ break;
+ }
+ if (!found && def >= 0) {
+ j = def;
+ found = true;
+ }
+ if (found) {
+ struct wprobe_filter_counter *c = &fg->counters[j];
+
+ if (hdr->type >= WPROBE_PKT_TX)
+ c->tx++;
+ else
+ c->rx++;
+ }
+ }
+
+ spin_unlock_irqrestore(&f->lock, flags);
+out:
+ rcu_read_unlock();
+ return 0;
+}
+EXPORT_SYMBOL(wprobe_add_frame);
+
static int
wprobe_sync_data(struct wprobe_iface *dev, struct wprobe_link *l, bool query)
{
[WPROBE_ATTR_SAMPLES_MAX] = { .type = NLA_U32 },
[WPROBE_ATTR_SAMPLES_SCALE_M] = { .type = NLA_U32 },
[WPROBE_ATTR_SAMPLES_SCALE_D] = { .type = NLA_U32 },
+ [WPROBE_ATTR_FILTER] = { .type = NLA_BINARY, .len = 32768 },
};
static bool
return NULL;
}
+static bool
+wprobe_dump_filter_group(struct sk_buff *msg, struct wprobe_filter_group *fg, struct netlink_callback *cb)
+{
+ struct genlmsghdr *hdr;
+ struct nlattr *group, *item;
+ int i;
+
+ hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
+ &wprobe_fam, NLM_F_MULTI, WPROBE_CMD_GET_FILTER);
+ if (!hdr)
+ return false;
+
+ NLA_PUT_STRING(msg, WPROBE_ATTR_NAME, fg->name);
+ group = nla_nest_start(msg, WPROBE_ATTR_FILTER_GROUP);
+ for (i = 0; i < fg->n_items; i++) {
+ struct wprobe_filter_item *fi = fg->items[i];
+ struct wprobe_filter_counter *fc = &fg->counters[i];
+
+ item = nla_nest_start(msg, WPROBE_ATTR_FILTER_GROUP);
+ NLA_PUT_STRING(msg, WPROBE_ATTR_NAME, fi->hdr.name);
+ NLA_PUT_U64(msg, WPROBE_ATTR_RXCOUNT, fc->rx);
+ NLA_PUT_U64(msg, WPROBE_ATTR_TXCOUNT, fc->tx);
+ nla_nest_end(msg, item);
+ }
+
+ nla_nest_end(msg, group);
+ genlmsg_end(msg, hdr);
+ return true;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ return false;
+}
+
+static int
+wprobe_dump_filters(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct wprobe_iface *dev = (struct wprobe_iface *)cb->args[0];
+ struct wprobe_filter *f;
+ int err = 0;
+ int i = 0;
+
+ if (!dev) {
+ err = nlmsg_parse(cb->nlh, GENL_HDRLEN + wprobe_fam.hdrsize,
+ wprobe_fam.attrbuf, wprobe_fam.maxattr, wprobe_policy);
+ if (err)
+ goto done;
+
+ dev = wprobe_get_dev(wprobe_fam.attrbuf[WPROBE_ATTR_INTERFACE]);
+ if (!dev) {
+ err = -ENODEV;
+ goto done;
+ }
+
+ cb->args[0] = (long) dev;
+ cb->args[1] = 0;
+ } else {
+ if (!wprobe_check_ptr(&wprobe_if, &dev->list)) {
+ err = -ENODEV;
+ goto done;
+ }
+ }
+
+ rcu_read_lock();
+ f = rcu_dereference(dev->active_filter);
+ if (!f)
+ goto abort;
+
+ for (i = cb->args[1]; i < f->n_groups; i++) {
+ if (unlikely(!wprobe_dump_filter_group(skb, &f->groups[i], cb)))
+ break;
+ }
+ cb->args[1] = i;
+abort:
+ rcu_read_unlock();
+ err = skb->len;
+done:
+ return err;
+}
+
static bool
wprobe_dump_link(struct sk_buff *msg, struct wprobe_link *l, struct netlink_callback *cb)
{
return err;
}
+static int
+wprobe_check_filter(void *data, int datalen, int gs)
+{
+ struct wprobe_filter_item_hdr *hdr;
+ void *orig_data = data;
+ void *end = data + datalen;
+ int i, j, k, is, cur_is;
+
+ for (i = j = is = 0; i < gs; i++) {
+ hdr = data;
+ data += sizeof(*hdr);
+
+ if (data > end)
+ goto overrun;
+
+ hdr->name[31] = 0;
+ cur_is = be32_to_cpu(hdr->n_items);
+ is += cur_is;
+ for (j = 0; j < cur_is; j++) {
+ struct sock_filter *sf;
+ int n_items;
+
+ hdr = data;
+ data += sizeof(*hdr);
+ if (data > end)
+ goto overrun;
+
+ if (hdr->n_items > 1024)
+ goto overrun;
+
+ hdr->name[31] = 0;
+ hdr->n_items = n_items = be32_to_cpu(hdr->n_items);
+ sf = data;
+ if (n_items > 0) {
+ for (k = 0; k < n_items; k++) {
+ sf->code = be16_to_cpu(sf->code);
+ sf->k = be32_to_cpu(sf->k);
+ sf++;
+ }
+ if (sk_chk_filter(data, n_items) != 0) {
+ printk("%s: filter check failed at group %d, item %d\n", __func__, i, j);
+ return 0;
+ }
+ }
+ data += n_items * sizeof(struct sock_filter);
+ }
+ }
+ return is;
+
+overrun:
+ printk(KERN_ERR "%s: overrun during filter check at group %d, item %d, offset=%d, len=%d\n", __func__, i, j, (data - orig_data), datalen);
+ return 0;
+}
+
+static void
+wprobe_free_filter(struct wprobe_filter *f)
+{
+ if (f->skb)
+ kfree_skb(f->skb);
+ if (f->data)
+ kfree(f->data);
+ if (f->items)
+ kfree(f->items);
+ if (f->counters)
+ kfree(f->counters);
+ kfree(f);
+}
+
+
+static int
+wprobe_set_filter(struct wprobe_iface *dev, void *data, int len)
+{
+ struct wprobe_filter_hdr *fhdr;
+ struct wprobe_rtap_hdr *rtap;
+ struct wprobe_filter *f;
+ int i, j, cur_is, is, gs;
+
+ if (len < sizeof(*fhdr))
+ return -EINVAL;
+
+ fhdr = data;
+ data += sizeof(*fhdr);
+ len -= sizeof(*fhdr);
+
+ if (memcmp(fhdr->magic, "WPFF", 4) != 0) {
+ printk(KERN_ERR "%s: filter rejected (invalid magic)\n", __func__);
+ return -EINVAL;
+ }
+
+ gs = be16_to_cpu(fhdr->n_groups);
+ is = wprobe_check_filter(data, len, gs);
+ if (is == 0)
+ return -EINVAL;
+
+ f = kzalloc(sizeof(struct wprobe_filter) +
+ gs * sizeof(struct wprobe_filter_group), GFP_ATOMIC);
+ if (!f)
+ return -ENOMEM;
+
+ f->skb = alloc_skb(WPROBE_MAX_FRAME_SIZE, GFP_ATOMIC);
+ if (!f->skb)
+ goto error;
+
+ f->data = kmalloc(len, GFP_ATOMIC);
+ if (!f->data)
+ goto error;
+
+ f->items = kzalloc(sizeof(struct wprobe_filter_item *) * is, GFP_ATOMIC);
+ if (!f->items)
+ goto error;
+
+ f->counters = kzalloc(sizeof(struct wprobe_filter_counter) * is, GFP_ATOMIC);
+ if (!f->counters)
+ goto error;
+
+ spin_lock_init(&f->lock);
+ memcpy(f->data, data, len);
+ f->n_groups = gs;
+
+ if (f->hdrlen < sizeof(struct wprobe_wlan_hdr))
+ f->hdrlen = sizeof(struct wprobe_wlan_hdr);
+
+ rtap = (struct wprobe_rtap_hdr *)skb_put(f->skb, sizeof(*rtap));
+ memset(rtap, 0, sizeof(*rtap));
+ rtap->len = cpu_to_le16(sizeof(struct wprobe_rtap_hdr) + f->hdrlen);
+ data = f->data;
+
+ cur_is = 0;
+ for (i = 0; i < gs; i++) {
+ struct wprobe_filter_item_hdr *hdr = data;
+ struct wprobe_filter_group *g = &f->groups[i];
+
+ data += sizeof(*hdr);
+ g->name = hdr->name;
+ g->items = &f->items[cur_is];
+ g->counters = &f->counters[cur_is];
+ g->n_items = hdr->n_items;
+
+ for (j = 0; j < g->n_items; j++) {
+ hdr = data;
+ f->items[cur_is++] = data;
+ data += sizeof(*hdr) + be32_to_cpu(hdr->n_items) * sizeof(struct sock_filter);
+ }
+ }
+ rcu_assign_pointer(dev->active_filter, f);
+ return 0;
+
+error:
+ wprobe_free_filter(f);
+ return -ENOMEM;
+}
+
static int
wprobe_set_config(struct sk_buff *skb, struct genl_info *info)
{
int err = -ENOENT;
u32 scale_min, scale_max;
u32 scale_m, scale_d;
+ struct nlattr *attr;
+ struct wprobe_filter *filter_free = NULL;
rcu_read_lock();
dev = wprobe_get_dev(info->attrs[WPROBE_ATTR_INTERFACE]);
goto done;
}
+ if (info->attrs[WPROBE_ATTR_FLAGS]) {
+ u32 flags = nla_get_u32(info->attrs[WPROBE_ATTR_FLAGS]);
+
+ if (flags & BIT(WPROBE_F_RESET)) {
+ struct wprobe_link *l;
+
+ memset(dev->val, 0, sizeof(struct wprobe_value) * dev->n_global_items);
+ list_for_each_entry_rcu(l, &dev->links, list) {
+ memset(l->val, 0, sizeof(struct wprobe_value) * dev->n_link_items);
+ }
+ }
+ }
+
if (info->attrs[WPROBE_ATTR_SAMPLES_MIN] ||
info->attrs[WPROBE_ATTR_SAMPLES_MAX]) {
- if (info->attrs[WPROBE_ATTR_SAMPLES_MIN])
- scale_min = nla_get_u32(info->attrs[WPROBE_ATTR_SAMPLES_MIN]);
+ if ((attr = info->attrs[WPROBE_ATTR_SAMPLES_MIN]))
+ scale_min = nla_get_u32(attr);
else
scale_min = dev->scale_min;
- if (info->attrs[WPROBE_ATTR_SAMPLES_MAX])
- scale_max = nla_get_u32(info->attrs[WPROBE_ATTR_SAMPLES_MAX]);
+ if ((attr = info->attrs[WPROBE_ATTR_SAMPLES_MAX]))
+ scale_max = nla_get_u32(attr);
else
scale_max = dev->scale_max;
dev->scale_d = scale_d;
}
+ if ((attr = info->attrs[WPROBE_ATTR_FILTER])) {
+ filter_free = rcu_dereference(dev->active_filter);
+ rcu_assign_pointer(dev->active_filter, NULL);
+ if (nla_len(attr) > 0)
+ wprobe_set_filter(dev, nla_data(attr), nla_len(attr));
+ }
+
err = 0;
if (info->attrs[WPROBE_ATTR_INTERVAL]) {
/* change of measurement interval requested */
spin_unlock_irqrestore(&dev->lock, flags);
done_unlocked:
rcu_read_unlock();
+ if (filter_free) {
+ synchronize_rcu();
+ wprobe_free_filter(filter_free);
+ }
return err;
}
{
.cmd = WPROBE_CMD_CONFIG,
.doit = wprobe_set_config,
+ .policy = wprobe_policy,
+ },
+ {
+ .cmd = WPROBE_CMD_GET_FILTER,
+ .dumpit = wprobe_dump_filters,
+ .policy = wprobe_policy,
},
};
-CFLAGS = -O2
-CPPFLAGS ?= -I../kernel
-WFLAGS = -Wall -Werror
+include ../Makefile.inc
+
+CPPFLAGS += -I../kernel
LDFLAGS =
+ifneq ($(HOST_OS),Linux)
+USE_LIBNL_MICRO=1
+else
+USE_LIBNL_MICRO=
+endif
+
+ifeq ($(USE_LIBNL_MICRO),1)
+LIBNL_PREFIX = /usr/local
+LIBNL = $(LIBNL_PREFIX)/lib/libnl-micro.a
+CPPFLAGS += -I$(LIBNL_PREFIX)/include/libnl-micro
+EXTRA_CFLAGS += -DNO_LOCAL_ACCESS
+else
LIBNL = -lnl
+endif
+
LIBM = -lm
LIBS = $(LIBNL) $(LIBM)
-all: libwprobe.a wprobe-info
+all: libwprobe.a wprobe-util
-libwprobe.a: wprobe.o
+libwprobe.a: wprobe-lib.o
rm -f $@
$(AR) rcu $@ $^
$(RANLIB) $@
%.o: %.c
- $(CC) $(WFLAGS) -c -o $@ $(CPPFLAGS) $(CFLAGS) $<
+ $(CC) $(WFLAGS) -c -o $@ $(CPPFLAGS) $(CFLAGS) $(EXTRA_CFLAGS) $<
-wprobe-info: wprobe-info.o wprobe.o
+wprobe-util: wprobe-util.o wprobe-lib.o
$(CC) -o $@ $^ $(LDFLAGS) $(LIBS)
+
+clean:
+ rm -f *.o *.a wprobe-util
+++ /dev/null
-/*
- * wprobe-test.c: Wireless probe user space test code
- * Copyright (C) 2008-2009 Felix Fietkau <nbd@openwrt.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <inttypes.h>
-#include <errno.h>
-#include <stdint.h>
-#include <getopt.h>
-#include <stdbool.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <linux/wprobe.h>
-#include "wprobe.h"
-
-static const char *
-wprobe_dump_value(struct wprobe_attribute *attr)
-{
- static char buf[128];
-
-#define HANDLE_TYPE(_type, _format) \
- case WPROBE_VAL_##_type: \
- snprintf(buf, sizeof(buf), _format, attr->val._type); \
- break
-
- switch(attr->type) {
- HANDLE_TYPE(S8, "%d");
- HANDLE_TYPE(S16, "%d");
- HANDLE_TYPE(S32, "%d");
- HANDLE_TYPE(S64, "%lld");
- HANDLE_TYPE(U8, "%d");
- HANDLE_TYPE(U16, "%d");
- HANDLE_TYPE(U32, "%d");
- HANDLE_TYPE(U64, "%lld");
- case WPROBE_VAL_STRING:
- /* FIXME: implement this */
- default:
- strncpy(buf, "<unknown>", sizeof(buf));
- break;
- }
- if ((attr->flags & WPROBE_F_KEEPSTAT) &&
- (attr->val.n > 0)) {
- int len = strlen(buf);
- snprintf(buf + len, sizeof(buf) - len, " (avg: %.02f; stdev: %.02f, n=%d)", attr->val.avg, attr->val.stdev, attr->val.n);
- }
-#undef HANDLE_TYPE
-
- return buf;
-}
-
-
-static void
-wprobe_dump_data(struct wprobe_iface *dev)
-{
- struct wprobe_attribute *attr;
- struct wprobe_link *link;
- bool first = true;
-
- fprintf(stderr, "\n");
- wprobe_request_data(dev, NULL);
- list_for_each_entry(attr, &dev->global_attr, list) {
- fprintf(stderr, (first ?
- "Global: %s=%s\n" :
- " %s=%s\n"),
- attr->name,
- wprobe_dump_value(attr)
- );
- first = false;
- }
-
- list_for_each_entry(link, &dev->links, list) {
- first = true;
- wprobe_request_data(dev, link->addr);
- list_for_each_entry(attr, &dev->link_attr, list) {
- if (first) {
- fprintf(stderr,
- "%02x:%02x:%02x:%02x:%02x:%02x: %s=%s\n",
- link->addr[0], link->addr[1], link->addr[2],
- link->addr[3], link->addr[4], link->addr[5],
- attr->name,
- wprobe_dump_value(attr));
- first = false;
- } else {
- fprintf(stderr,
- " %s=%s\n",
- attr->name,
- wprobe_dump_value(attr));
- }
- }
- }
-}
-
-static const char *attr_typestr[] = {
- [0] = "Unknown",
- [WPROBE_VAL_STRING] = "String",
- [WPROBE_VAL_U8] = "Unsigned 8 bit",
- [WPROBE_VAL_U16] = "Unsigned 16 bit",
- [WPROBE_VAL_U32] = "Unsigned 32 bit",
- [WPROBE_VAL_U64] = "Unsigned 64 bit",
- [WPROBE_VAL_S8] = "Signed 8 bit",
- [WPROBE_VAL_S16] = "Signed 16 bit",
- [WPROBE_VAL_S32] = "Signed 32 bit",
- [WPROBE_VAL_S64] = "Signed 64 bit",
-};
-
-static int usage(const char *prog)
-{
- fprintf(stderr,
- "Usage: %s <interface> [options]\n"
- "\n"
- "Options:\n"
- " -c: Only apply configuration\n"
- " -h: This help text\n"
- " -i <interval>: Set measurement interval\n"
- " -m: Run measurement loop\n"
- "\n"
- , prog);
- exit(1);
-}
-
-static void show_attributes(struct wprobe_iface *dev)
-{
- struct wprobe_attribute *attr;
- list_for_each_entry(attr, &dev->global_attr, list) {
- fprintf(stderr, "Global attribute: '%s' (%s)\n",
- attr->name, attr_typestr[attr->type]);
- }
- list_for_each_entry(attr, &dev->link_attr, list) {
- fprintf(stderr, "Link attribute: '%s' (%s)\n",
- attr->name, attr_typestr[attr->type]);
- }
-}
-
-static void loop_measurement(struct wprobe_iface *dev)
-{
- while (1) {
- sleep(1);
- wprobe_update_links(dev);
- wprobe_dump_data(dev);
- }
-}
-
-int main(int argc, char **argv)
-{
- struct wprobe_iface *dev;
- const char *ifname;
- const char *prog = argv[0];
- enum {
- CMD_NONE,
- CMD_CONFIG,
- CMD_MEASURE,
- } cmd = CMD_NONE;
- int ch;
-
- if ((argc < 2) || (argv[1][0] == '-'))
- return usage(prog);
-
- ifname = argv[1];
- dev = wprobe_get_dev(ifname);
- argv++;
- argc--;
-
- if (!dev || (list_empty(&dev->global_attr) &&
- list_empty(&dev->link_attr))) {
- fprintf(stderr, "Interface '%s' not found\n", ifname);
- return -1;
- }
-
- while ((ch = getopt(argc, argv, "chi:m")) != -1) {
- switch(ch) {
- case 'c':
- cmd = CMD_CONFIG;
- break;
- case 'm':
- cmd = CMD_MEASURE;
- break;
- case 'i':
- dev->interval = strtoul(optarg, NULL, 10);
- break;
- case 'h':
- default:
- usage(prog);
- break;
- }
- }
-
- wprobe_apply_config(dev);
- if (cmd != CMD_CONFIG)
- show_attributes(dev);
- if (cmd == CMD_MEASURE)
- loop_measurement(dev);
-
- wprobe_free_dev(dev);
-
- return 0;
-}
--- /dev/null
+/*
+ * wprobe.c: Wireless probe user space library
+ * Copyright (C) 2008-2009 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <getopt.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <math.h>
+#include <linux/wprobe.h>
+#include <netlink/netlink.h>
+#include <netlink/attr.h>
+#include <netlink/genl/genl.h>
+#ifndef NO_LOCAL_ACCESS
+#include <netlink/genl/ctrl.h>
+#include <netlink/genl/family.h>
+#include <endian.h>
+#endif
+#include "wprobe.h"
+
+#define DEBUG 1
+#ifdef DEBUG
+#define DPRINTF(fmt, ...) fprintf(stderr, "%s(%d): " fmt, __func__, __LINE__, ##__VA_ARGS__)
+#else
+#define DPRINTF(fmt, ...) do {} while (0)
+#endif
+
+#if defined(BYTE_ORDER) && !defined(__BYTE_ORDER)
+#define __LITTLE_ENDIAN LITTLE_ENDIAN
+#define __BIG_ENDIAN BIG_ENDIAN
+#define __BYTE_ORDER BYTE_ORDER
+#endif
+
+#ifndef __BYTE_ORDER
+#error Unknown endian type
+#endif
+
+#define WPROBE_MAX_MSGLEN 65536
+
+static inline __u16 __swab16(__u16 x)
+{
+ return x<<8 | x>>8;
+}
+
+static inline __u32 __swab32(__u32 x)
+{
+ return x<<24 | x>>24 |
+ (x & (__u32)0x0000ff00UL)<<8 |
+ (x & (__u32)0x00ff0000UL)>>8;
+}
+
+static inline __u64 __swab64(__u64 x)
+{
+ return x<<56 | x>>56 |
+ (x & (__u64)0x000000000000ff00ULL)<<40 |
+ (x & (__u64)0x0000000000ff0000ULL)<<24 |
+ (x & (__u64)0x00000000ff000000ULL)<< 8 |
+ (x & (__u64)0x000000ff00000000ULL)>> 8 |
+ (x & (__u64)0x0000ff0000000000ULL)>>24 |
+ (x & (__u64)0x00ff000000000000ULL)>>40;
+}
+
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define SWAP16(var) var = __swab16(var)
+#define SWAP32(var) var = __swab32(var)
+#define SWAP64(var) var = __swab64(var)
+#else
+#define SWAP16(var) do {} while(0)
+#define SWAP32(var) do {} while(0)
+#define SWAP64(var) do {} while(0)
+#endif
+
+int wprobe_port = 17990;
+static struct nlattr *tb[WPROBE_ATTR_LAST+1];
+static struct nla_policy attribute_policy[WPROBE_ATTR_LAST+1] = {
+ [WPROBE_ATTR_ID] = { .type = NLA_U32 },
+ [WPROBE_ATTR_MAC] = { .type = NLA_UNSPEC, .minlen = 6, .maxlen = 6 },
+ [WPROBE_ATTR_NAME] = { .type = NLA_STRING },
+ [WPROBE_ATTR_FLAGS] = { .type = NLA_U32 },
+ [WPROBE_ATTR_TYPE] = { .type = NLA_U8 },
+ [WPROBE_ATTR_FLAGS] = { .type = NLA_U32 },
+ [WPROBE_VAL_S8] = { .type = NLA_U8 },
+ [WPROBE_VAL_S16] = { .type = NLA_U16 },
+ [WPROBE_VAL_S32] = { .type = NLA_U32 },
+ [WPROBE_VAL_S64] = { .type = NLA_U64 },
+ [WPROBE_VAL_U8] = { .type = NLA_U8 },
+ [WPROBE_VAL_U16] = { .type = NLA_U16 },
+ [WPROBE_VAL_U32] = { .type = NLA_U32 },
+ [WPROBE_VAL_U64] = { .type = NLA_U64 },
+ [WPROBE_VAL_SUM] = { .type = NLA_U64 },
+ [WPROBE_VAL_SUM_SQ] = { .type = NLA_U64 },
+ [WPROBE_VAL_SAMPLES] = { .type = NLA_U32 },
+ [WPROBE_VAL_SCALE_TIME] = { .type = NLA_U64 },
+ [WPROBE_ATTR_INTERVAL] = { .type = NLA_U64 },
+ [WPROBE_ATTR_SAMPLES_MIN] = { .type = NLA_U32 },
+ [WPROBE_ATTR_SAMPLES_MAX] = { .type = NLA_U32 },
+ [WPROBE_ATTR_SAMPLES_SCALE_M] = { .type = NLA_U32 },
+ [WPROBE_ATTR_SAMPLES_SCALE_D] = { .type = NLA_U32 },
+ [WPROBE_ATTR_FILTER_GROUP] = { .type = NLA_NESTED },
+ [WPROBE_ATTR_RXCOUNT] = { .type = NLA_U64 },
+ [WPROBE_ATTR_TXCOUNT] = { .type = NLA_U64 },
+};
+
+typedef int (*wprobe_cb_t)(struct nl_msg *, void *);
+
+struct wprobe_iface_ops {
+ int (*send_msg)(struct wprobe_iface *dev, struct nl_msg *msg, wprobe_cb_t cb, void *arg);
+ void (*free)(struct wprobe_iface *dev);
+};
+
+struct wprobe_attr_cb {
+ struct list_head *list;
+ char *addr;
+};
+
+#define WPROBE_MAGIC_STR "WPROBE"
+struct wprobe_init_hdr {
+ struct {
+ char magic[sizeof(WPROBE_MAGIC_STR)];
+
+ /* protocol version */
+ uint8_t version;
+
+ /* extra header length (unused for now) */
+ uint16_t extra;
+ } pre __attribute__((packed));
+ union {
+ struct {
+ uint16_t genl_family;
+ } v0 __attribute__((packed));
+ };
+} __attribute__((packed));
+
+struct wprobe_msg_hdr {
+ __u16 status;
+ __u16 error;
+ __u32 len;
+};
+
+enum wprobe_resp_status {
+ WPROBE_MSG_DONE = 0,
+ WPROBE_MSG_DATA = 1,
+};
+
+static inline void
+wprobe_swap_msg_hdr(struct wprobe_msg_hdr *mhdr)
+{
+ SWAP16(mhdr->status);
+ SWAP16(mhdr->error);
+ SWAP32(mhdr->len);
+}
+
+static int
+save_attribute_handler(struct nl_msg *msg, void *arg)
+{
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ const char *name = "N/A";
+ struct wprobe_attribute *attr;
+ int type = 0;
+ struct wprobe_attr_cb *cb = arg;
+
+ nla_parse(tb, WPROBE_ATTR_LAST, genlmsg_attrdata(gnlh, 0),
+ genlmsg_attrlen(gnlh, 0), attribute_policy);
+
+ if (tb[WPROBE_ATTR_NAME])
+ name = nla_data(tb[WPROBE_ATTR_NAME]);
+
+ attr = malloc(sizeof(struct wprobe_attribute) + strlen(name) + 1);
+ if (!attr)
+ return -1;
+
+ memset(attr, 0, sizeof(struct wprobe_attribute));
+
+ if (tb[WPROBE_ATTR_ID])
+ attr->id = nla_get_u32(tb[WPROBE_ATTR_ID]);
+
+ if (tb[WPROBE_ATTR_MAC] && cb->addr)
+ memcpy(cb->addr, nla_data(tb[WPROBE_ATTR_MAC]), 6);
+
+ if (tb[WPROBE_ATTR_FLAGS])
+ attr->flags = nla_get_u32(tb[WPROBE_ATTR_FLAGS]);
+
+ if (tb[WPROBE_ATTR_TYPE])
+ type = nla_get_u8(tb[WPROBE_ATTR_TYPE]);
+
+ if ((type < WPROBE_VAL_STRING) ||
+ (type > WPROBE_VAL_U64))
+ type = 0;
+
+ attr->type = type;
+ strcpy(attr->name, name);
+ INIT_LIST_HEAD(&attr->list);
+ list_add(&attr->list, cb->list);
+ return 0;
+}
+
+static struct nl_msg *
+wprobe_new_msg(struct wprobe_iface *dev, int cmd, bool dump)
+{
+ struct nl_msg *msg;
+ uint32_t flags = 0;
+
+ msg = nlmsg_alloc_size(65536);
+ if (!msg)
+ return NULL;
+
+ if (dump)
+ flags |= NLM_F_DUMP;
+
+ genlmsg_put(msg, 0, 0, dev->genl_family,
+ 0, flags, cmd, 0);
+
+ NLA_PUT_STRING(msg, WPROBE_ATTR_INTERFACE, dev->ifname);
+nla_put_failure:
+ return msg;
+}
+
+
+static int
+dump_attributes(struct wprobe_iface *dev, bool link, struct list_head *list, char *addr)
+{
+ struct nl_msg *msg;
+ struct wprobe_attr_cb cb;
+
+ cb.list = list;
+ cb.addr = addr;
+ msg = wprobe_new_msg(dev, WPROBE_CMD_GET_LIST, true);
+ if (!msg)
+ return -ENOMEM;
+
+ if (link)
+ NLA_PUT(msg, WPROBE_ATTR_MAC, 6, "\x00\x00\x00\x00\x00\x00");
+
+ return dev->ops->send_msg(dev, msg, save_attribute_handler, &cb);
+
+nla_put_failure:
+ nlmsg_free(msg);
+ return -EINVAL;
+}
+
+static struct wprobe_iface *
+wprobe_alloc_dev(void)
+{
+ struct wprobe_iface *dev;
+
+ dev = malloc(sizeof(struct wprobe_iface));
+ if (!dev)
+ return NULL;
+
+ memset(dev, 0, sizeof(struct wprobe_iface));
+
+ dev->interval = -1;
+ dev->scale_min = -1;
+ dev->scale_max = -1;
+ dev->scale_m = -1;
+ dev->scale_d = -1;
+ dev->sockfd = -1;
+
+ INIT_LIST_HEAD(&dev->global_attr);
+ INIT_LIST_HEAD(&dev->link_attr);
+ INIT_LIST_HEAD(&dev->links);
+ return dev;
+}
+
+static int
+wprobe_init_dev(struct wprobe_iface *dev)
+{
+ dump_attributes(dev, false, &dev->global_attr, NULL);
+ dump_attributes(dev, true, &dev->link_attr, NULL);
+ return 0;
+}
+
+#ifndef NO_LOCAL_ACCESS
+static int n_devs = 0;
+static struct nl_sock *handle = NULL;
+static struct nl_cache *cache = NULL;
+static struct genl_family *family = NULL;
+
+static int
+error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
+{
+ int *ret = arg;
+ *ret = err->error;
+ return NL_STOP;
+}
+
+static int
+finish_handler(struct nl_msg *msg, void *arg)
+{
+ int *ret = arg;
+ *ret = 0;
+ return NL_SKIP;
+}
+
+static int
+ack_handler(struct nl_msg *msg, void *arg)
+{
+ int *ret = arg;
+ *ret = 0;
+ return NL_STOP;
+}
+
+static void
+wprobe_local_free(struct wprobe_iface *dev)
+{
+ /* should not happen */
+ if (n_devs == 0)
+ return;
+
+ if (--n_devs != 0)
+ return;
+
+ if (cache)
+ nl_cache_free(cache);
+ if (handle)
+ nl_socket_free(handle);
+ handle = NULL;
+ cache = NULL;
+}
+
+static int
+wprobe_local_init(void)
+{
+ int ret;
+
+ if (n_devs++ > 0)
+ return 0;
+
+ handle = nl_socket_alloc();
+ if (!handle) {
+ DPRINTF("Failed to create handle\n");
+ goto err;
+ }
+
+ if (genl_connect(handle)) {
+ DPRINTF("Failed to connect to generic netlink\n");
+ goto err;
+ }
+
+ ret = genl_ctrl_alloc_cache(handle, &cache);
+ if (ret < 0) {
+ DPRINTF("Failed to allocate netlink cache\n");
+ goto err;
+ }
+
+ family = genl_ctrl_search_by_name(cache, "wprobe");
+ if (!family) {
+ DPRINTF("wprobe API not present\n");
+ goto err;
+ }
+ return 0;
+
+err:
+ wprobe_local_free(NULL);
+ return -EINVAL;
+}
+
+
+static int
+wprobe_local_send_msg(struct wprobe_iface *dev, struct nl_msg *msg, wprobe_cb_t callback, void *arg)
+{
+ struct nl_cb *cb;
+ int err = 0;
+
+ cb = nl_cb_alloc(NL_CB_DEFAULT);
+ if (!cb)
+ goto out_no_cb;
+
+ if (callback)
+ nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, callback, arg);
+
+ err = nl_send_auto_complete(handle, msg);
+ if (err < 0)
+ goto out;
+
+ err = 1;
+
+ nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
+ nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
+ nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
+
+ while (err > 0)
+ nl_recvmsgs(handle, cb);
+
+out:
+ nl_cb_put(cb);
+out_no_cb:
+ nlmsg_free(msg);
+ return err;
+}
+
+static const struct wprobe_iface_ops wprobe_local_ops = {
+ .send_msg = wprobe_local_send_msg,
+ .free = wprobe_local_free,
+};
+
+struct wprobe_iface *
+wprobe_get_dev(const char *ifname)
+{
+ struct wprobe_iface *dev;
+
+ if (wprobe_local_init() != 0)
+ return NULL;
+
+ dev = wprobe_alloc_dev();
+ if (!dev)
+ goto error_alloc;
+
+ dev->ifname = strdup(ifname);
+ dev->ops = &wprobe_local_ops;
+ dev->genl_family = genl_family_get_id(family);
+
+ if (wprobe_init_dev(dev) < 0)
+ goto error;
+
+ return dev;
+
+error:
+ free(dev);
+error_alloc:
+ wprobe_local_free(NULL);
+ return NULL;
+}
+
+#endif
+
+static void swap_nlmsghdr(struct nlmsghdr *nlh)
+{
+ SWAP32(nlh->nlmsg_len);
+ SWAP16(nlh->nlmsg_type);
+ SWAP16(nlh->nlmsg_flags);
+ SWAP32(nlh->nlmsg_seq);
+ SWAP32(nlh->nlmsg_pid);
+}
+
+static void swap_genlmsghdr(struct genlmsghdr *gnlh)
+{
+#if 0 /* probably unnecessary */
+ SWAP16(gnlh->reserved);
+#endif
+}
+
+static void
+wprobe_swap_nested(void *data, int len, bool outgoing)
+{
+ void *end = data + len;
+
+ while (data < end) {
+ struct nlattr *nla = data;
+ unsigned int type, len;
+
+ if (!outgoing) {
+ SWAP16(nla->nla_len);
+ SWAP16(nla->nla_type);
+
+ /* required for further sanity checks */
+ if (data + nla->nla_len > end)
+ nla->nla_len = end - data;
+ }
+
+ len = NLA_ALIGN(nla->nla_len);
+ type = nla->nla_type & NLA_TYPE_MASK;
+
+ if (type <= WPROBE_ATTR_LAST) {
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+ switch(attribute_policy[type].type) {
+ case NLA_U16:
+ SWAP16(*(__u16 *)nla_data(nla));
+ break;
+ case NLA_U32:
+ SWAP32(*(__u32 *)nla_data(nla));
+ break;
+ case NLA_U64:
+ SWAP64(*(__u64 *)nla_data(nla));
+ break;
+ case NLA_NESTED:
+ wprobe_swap_nested(nla_data(nla), nla_len(nla), outgoing);
+ break;
+ }
+#endif
+ }
+ data += len;
+
+ if (outgoing) {
+ SWAP16(nla->nla_len);
+ SWAP16(nla->nla_type);
+ }
+ if (!nla->nla_len)
+ break;
+ }
+}
+
+static struct nl_msg *
+wprobe_msg_from_network(int socket, int len)
+{
+ struct genlmsghdr *gnlh;
+ struct nlmsghdr *nlh;
+ struct nl_msg *msg;
+ void *data;
+
+ msg = nlmsg_alloc_size(len + 32);
+ if (!msg)
+ return NULL;
+
+ nlh = nlmsg_hdr(msg);
+ if (read(socket, nlh, len) != len)
+ goto free;
+
+ swap_nlmsghdr(nlh);
+ if (nlh->nlmsg_len > len)
+ goto free;
+
+ gnlh = nlmsg_data(nlh);
+ swap_genlmsghdr(gnlh);
+
+ data = genlmsg_data(gnlh);
+ wprobe_swap_nested(data, genlmsg_len(gnlh), false);
+
+ return msg;
+free:
+ nlmsg_free(msg);
+ return NULL;
+}
+
+static int
+wprobe_msg_to_network(int socket, struct nl_msg *msg)
+{
+ struct nlmsghdr *nlh = nlmsg_hdr(msg);
+ struct wprobe_msg_hdr mhdr;
+ struct genlmsghdr *gnlh;
+ void *buf, *data;
+ int buflen, datalen;
+ int ret;
+
+ buflen = nlh->nlmsg_len;
+ buf = malloc(buflen);
+ if (!buf)
+ return -ENOMEM;
+
+ memset(&mhdr, 0, sizeof(mhdr));
+ mhdr.status = WPROBE_MSG_DATA;
+ mhdr.len = buflen;
+ wprobe_swap_msg_hdr(&mhdr);
+ write(socket, &mhdr, sizeof(mhdr));
+
+ memcpy(buf, nlh, buflen);
+ nlh = buf;
+ gnlh = nlmsg_data(nlh);
+ data = genlmsg_data(gnlh);
+ datalen = genlmsg_len(gnlh);
+
+ wprobe_swap_nested(data, datalen, true);
+ swap_genlmsghdr(gnlh);
+ swap_nlmsghdr(nlh);
+ ret = write(socket, buf, buflen);
+ free(buf);
+
+ return ret;
+}
+
+static int
+wprobe_remote_send_msg(struct wprobe_iface *dev, struct nl_msg *msg, wprobe_cb_t callback, void *arg)
+{
+ struct wprobe_msg_hdr mhdr;
+ int msgs = 0;
+
+ wprobe_msg_to_network(dev->sockfd, msg);
+ nlmsg_free(msg);
+ do {
+ if (read(dev->sockfd, &mhdr, sizeof(mhdr)) != sizeof(mhdr)) {
+ DPRINTF("Failed to read response header\n");
+ return -1;
+ }
+ wprobe_swap_msg_hdr(&mhdr);
+
+ switch(mhdr.status) {
+ case WPROBE_MSG_DATA:
+ if (mhdr.len > WPROBE_MAX_MSGLEN) {
+ fprintf(stderr, "Invalid length in received response message.\n");
+ exit(1);
+ }
+
+ msg = wprobe_msg_from_network(dev->sockfd, mhdr.len);
+ if (!msg)
+ return -EINVAL;
+
+ msgs++;
+ callback(msg, arg);
+ nlmsg_free(msg);
+ break;
+ }
+ } while (mhdr.status != WPROBE_MSG_DONE);
+
+ if (mhdr.error)
+ return -mhdr.error;
+ else
+ return msgs;
+}
+
+
+static void
+wprobe_socket_dev_free(struct wprobe_iface *dev)
+{
+ if (dev->sockfd >= 0)
+ close(dev->sockfd);
+}
+
+static const struct wprobe_iface_ops wprobe_remote_ops = {
+ .send_msg = wprobe_remote_send_msg,
+ .free = wprobe_socket_dev_free,
+};
+
+
+#ifndef NO_LOCAL_ACCESS
+int
+wprobe_server_init(int socket)
+{
+ struct wprobe_init_hdr hdr;
+ int ret;
+
+ ret = wprobe_local_init();
+ if (ret != 0)
+ return ret;
+
+ memset(&hdr, 0, sizeof(hdr));
+ memcpy(hdr.pre.magic, WPROBE_MAGIC_STR, sizeof(WPROBE_MAGIC_STR));
+ hdr.pre.version = 0;
+ hdr.v0.genl_family = genl_family_get_id(family);
+ SWAP16(hdr.v0.genl_family);
+ write(socket, (unsigned char *)&hdr, sizeof(hdr));
+
+ return 0;
+}
+
+static int
+wprobe_server_cb(struct nl_msg *msg, void *arg)
+{
+ int *socket = arg;
+ int ret;
+
+ ret = wprobe_msg_to_network(*socket, msg);
+ if (ret > 0)
+ ret = 0;
+
+ return ret;
+}
+
+
+int
+wprobe_server_handle(int socket)
+{
+ struct wprobe_msg_hdr mhdr;
+ struct nl_msg *msg;
+ int ret;
+
+ ret = read(socket, &mhdr, sizeof(mhdr));
+ if (ret != sizeof(mhdr)) {
+ if (ret <= 0)
+ return -1;
+
+ DPRINTF("Failed to read request header\n");
+ return -EINVAL;
+ }
+ wprobe_swap_msg_hdr(&mhdr);
+
+ switch(mhdr.status) {
+ case WPROBE_MSG_DATA:
+ if (mhdr.len > WPROBE_MAX_MSGLEN) {
+ DPRINTF("Invalid length in received response message.\n");
+ return -EINVAL;
+ }
+ msg = wprobe_msg_from_network(socket, mhdr.len);
+ break;
+ default:
+ DPRINTF("Invalid request header type\n");
+ return -ENOENT;
+ }
+
+ if (!msg) {
+ DPRINTF("Failed to get message\n");
+ return -EINVAL;
+ }
+
+ ret = wprobe_local_send_msg(NULL, msg, wprobe_server_cb, &socket);
+
+ memset(&mhdr, 0, sizeof(mhdr));
+ mhdr.status = WPROBE_MSG_DONE;
+ if (ret < 0)
+ mhdr.error = (uint16_t) -ret;
+
+ ret = write(socket, (unsigned char *)&mhdr, sizeof(mhdr));
+ if (ret > 0)
+ ret = 0;
+
+ return ret;
+}
+
+void
+wprobe_server_done(void)
+{
+ wprobe_local_free(NULL);
+}
+#endif
+
+struct wprobe_iface *
+wprobe_get_from_socket(int socket, const char *name)
+{
+ struct wprobe_iface *dev;
+ struct wprobe_init_hdr hdr;
+
+ dev = wprobe_alloc_dev();
+ if (!dev)
+ goto out;
+
+ dev->ops = &wprobe_remote_ops;
+ dev->sockfd = socket;
+ dev->ifname = strdup(name);
+
+ /* read version and header length */
+ if (read(socket, &hdr.pre, sizeof(hdr.pre)) != sizeof(hdr.pre)) {
+ DPRINTF("Could not read header\n");
+ goto error;
+ }
+
+ /* magic not found */
+ if (memcmp(hdr.pre.magic, WPROBE_MAGIC_STR, sizeof(hdr.pre.magic)) != 0) {
+ DPRINTF("Magic does not match\n");
+ goto error;
+ }
+
+ /* unsupported version */
+ if (hdr.pre.version != 0) {
+ DPRINTF("Protocol version does not match\n");
+ goto error;
+ }
+
+ if (read(socket, &hdr.v0, sizeof(hdr.v0)) != sizeof(hdr.v0)) {
+ DPRINTF("Could not read header data\n");
+ goto error;
+ }
+
+ SWAP16(hdr.pre.extra);
+ SWAP16(hdr.v0.genl_family);
+ dev->genl_family = hdr.v0.genl_family;
+
+ if (wprobe_init_dev(dev) < 0) {
+ DPRINTF("Could not initialize device\n");
+ goto error;
+ }
+
+out:
+ return dev;
+
+error:
+ wprobe_free_dev(dev);
+ return NULL;
+}
+
+struct wprobe_iface *
+wprobe_get_auto(const char *arg, char **err)
+{
+ static struct sockaddr_in sa;
+ static char errbuf[512];
+
+ struct wprobe_iface *dev = NULL;
+ struct hostent *h;
+ char *devstr = strdup(arg);
+ char *sep = NULL;
+ int sock = -1;
+ int len;
+
+ if (err)
+ *err = NULL;
+
+ sep = strchr(devstr, ':');
+ if (!sep) {
+#ifndef NO_LOCAL_ACCESS
+ free(devstr);
+ return wprobe_get_dev(arg);
+#else
+ *err = "Invalid argument";
+ goto out;
+#endif
+ }
+
+ *sep = 0;
+ sep++;
+
+ sock = socket(AF_INET, SOCK_STREAM, 0);
+ if (sock < 0)
+ goto syserr;
+
+ h = gethostbyname(devstr);
+ if (!h) {
+ sprintf(errbuf, "Host not found");
+ goto out_err;
+ }
+
+ memcpy(&sa.sin_addr, h->h_addr, h->h_length);
+ sa.sin_family = AF_INET;
+ sa.sin_port = htons(wprobe_port);
+ if (connect(sock, (struct sockaddr *)&sa, sizeof(sa)) < 0)
+ goto syserr;
+
+ dev = wprobe_get_from_socket(sock, sep);
+ if (!dev) {
+ sprintf(errbuf, "wprobe connection initialization failed");
+ goto out_err;
+ }
+ goto out;
+
+syserr:
+ if (err) {
+ strcpy(errbuf, "Connection failed: ");
+ len = strlen(errbuf);
+ strerror_r(errno, errbuf + len, sizeof(errbuf) - len - 1);
+ }
+out_err:
+ if (err)
+ *err = errbuf;
+ if (sock >= 0)
+ close(sock);
+out:
+ if (devstr)
+ free(devstr);
+ return dev;
+}
+
+static void
+free_attr_list(struct list_head *list)
+{
+ struct wprobe_attribute *attr, *tmp;
+
+ list_for_each_entry_safe(attr, tmp, list, list) {
+ list_del(&attr->list);
+ free(attr);
+ }
+}
+
+void
+wprobe_free_dev(struct wprobe_iface *dev)
+{
+ if (dev->ops->free)
+ dev->ops->free(dev);
+ free_attr_list(&dev->global_attr);
+ free_attr_list(&dev->link_attr);
+ free((void *)dev->ifname);
+ free(dev);
+}
+
+static struct wprobe_link *
+get_link(struct list_head *list, const char *addr)
+{
+ struct wprobe_link *l;
+
+ list_for_each_entry(l, list, list) {
+ if (!memcmp(l->addr, addr, 6)) {
+ list_del_init(&l->list);
+ goto out;
+ }
+ }
+
+ /* no previous link found, allocate a new one */
+ l = malloc(sizeof(struct wprobe_link));
+ if (!l)
+ goto out;
+
+ memset(l, 0, sizeof(struct wprobe_link));
+ memcpy(l->addr, addr, sizeof(l->addr));
+ INIT_LIST_HEAD(&l->list);
+
+out:
+ return l;
+}
+
+struct wprobe_save_cb {
+ struct list_head *list;
+ struct list_head old_list;
+};
+
+static int
+save_link_handler(struct nl_msg *msg, void *arg)
+{
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ struct wprobe_link *link;
+ struct wprobe_save_cb *cb = arg;
+ const char *addr;
+
+ nla_parse(tb, WPROBE_ATTR_LAST, genlmsg_attrdata(gnlh, 0),
+ genlmsg_attrlen(gnlh, 0), attribute_policy);
+
+ if (!tb[WPROBE_ATTR_MAC] || (nla_len(tb[WPROBE_ATTR_MAC]) != 6))
+ return -1;
+
+ addr = nla_data(tb[WPROBE_ATTR_MAC]);
+ link = get_link(&cb->old_list, addr);
+ if (!link)
+ return -1;
+
+ if (tb[WPROBE_ATTR_FLAGS])
+ link->flags = nla_get_u32(tb[WPROBE_ATTR_FLAGS]);
+
+ list_add_tail(&link->list, cb->list);
+ return 0;
+}
+
+
+int
+wprobe_update_links(struct wprobe_iface *dev)
+{
+ struct wprobe_link *l, *tmp;
+ struct nl_msg *msg;
+ struct wprobe_save_cb cb;
+ int err;
+
+ INIT_LIST_HEAD(&cb.old_list);
+ list_splice_init(&dev->links, &cb.old_list);
+ cb.list = &dev->links;
+
+ msg = wprobe_new_msg(dev, WPROBE_CMD_GET_LINKS, true);
+ if (!msg)
+ return -ENOMEM;
+
+ err = dev->ops->send_msg(dev, msg, save_link_handler, &cb);
+ if (err < 0)
+ return err;
+
+ list_for_each_entry_safe(l, tmp, &cb.old_list, list) {
+ list_del(&l->list);
+ free(l);
+ }
+
+ return 0;
+}
+
+
+struct wprobe_filter_data
+{
+ wprobe_filter_cb cb;
+ void *arg;
+ struct wprobe_filter_item *buf;
+ int buflen;
+};
+
+static int
+dump_filter_handler(struct nl_msg *msg, void *arg)
+{
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ struct wprobe_filter_data *data = arg;
+ struct nlattr *p;
+ const char *name;
+ int count = 0;
+ int len;
+
+ nla_parse(tb, WPROBE_ATTR_LAST, genlmsg_attrdata(gnlh, 0),
+ genlmsg_attrlen(gnlh, 0), attribute_policy);
+
+ if (!tb[WPROBE_ATTR_NAME] || !tb[WPROBE_ATTR_FILTER_GROUP])
+ return -1;
+
+ name = nla_data(tb[WPROBE_ATTR_NAME]);
+ nla_for_each_nested(p, tb[WPROBE_ATTR_FILTER_GROUP], len) {
+ count++;
+ }
+
+ if (data->buflen < count) {
+ if (data->buf)
+ free(data->buf);
+ data->buflen = count;
+ data->buf = malloc(sizeof(struct wprobe_filter_item) * count);
+ memset(data->buf, 0, sizeof(struct wprobe_filter_item) * count);
+ }
+
+ count = 0;
+ nla_for_each_nested(p, tb[WPROBE_ATTR_FILTER_GROUP], len) {
+ struct wprobe_filter_item *fi;
+
+ nla_parse(tb, WPROBE_ATTR_LAST, nla_data(p),
+ nla_len(p), attribute_policy);
+
+ if (!tb[WPROBE_ATTR_NAME] || !tb[WPROBE_ATTR_RXCOUNT]
+ || !tb[WPROBE_ATTR_TXCOUNT])
+ continue;
+
+ fi = &data->buf[count++];
+ strncpy(fi->name, nla_data(tb[WPROBE_ATTR_NAME]), sizeof(fi->name) - 1);
+ fi->name[sizeof(fi->name) - 1] = 0;
+ fi->rx = nla_get_u64(tb[WPROBE_ATTR_RXCOUNT]);
+ fi->tx = nla_get_u64(tb[WPROBE_ATTR_TXCOUNT]);
+ }
+ data->cb(data->arg, name, data->buf, count);
+
+ return 0;
+}
+
+int
+wprobe_dump_filters(struct wprobe_iface *dev, wprobe_filter_cb cb, void *arg)
+{
+ struct wprobe_filter_data data;
+ struct nl_msg *msg;
+ int err;
+
+ data.buf = 0;
+ data.buflen = 0;
+ data.cb = cb;
+ data.arg = arg;
+
+ msg = wprobe_new_msg(dev, WPROBE_CMD_GET_FILTER, true);
+ if (!msg)
+ return -ENOMEM;
+
+ err = dev->ops->send_msg(dev, msg, dump_filter_handler, &data);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+int
+wprobe_apply_config(struct wprobe_iface *dev)
+{
+ struct nl_msg *msg;
+
+ msg = wprobe_new_msg(dev, WPROBE_CMD_CONFIG, false);
+ if (!msg)
+ return -ENOMEM;
+
+ if (dev->interval >= 0)
+ NLA_PUT_MSECS(msg, WPROBE_ATTR_INTERVAL, dev->interval);
+
+ if (dev->filter_len < 0) {
+ NLA_PUT(msg, WPROBE_ATTR_FILTER, 0, NULL);
+ dev->filter_len = 0;
+ } else if (dev->filter && dev->filter_len > 0) {
+ NLA_PUT(msg, WPROBE_ATTR_FILTER, dev->filter_len, dev->filter);
+ }
+ dev->filter = NULL;
+
+ dev->ops->send_msg(dev, msg, NULL, NULL);
+ return 0;
+
+nla_put_failure:
+ nlmsg_free(msg);
+ return -ENOMEM;
+}
+
+int
+wprobe_measure(struct wprobe_iface *dev)
+{
+ struct nl_msg *msg;
+
+ msg = wprobe_new_msg(dev, WPROBE_CMD_MEASURE, false);
+ if (!msg)
+ return -ENOMEM;
+
+ dev->ops->send_msg(dev, msg, NULL, NULL);
+ return 0;
+}
+
+struct wprobe_request_cb {
+ struct list_head *list;
+ struct list_head old_list;
+ char *addr;
+};
+
+static int
+save_attrdata_handler(struct nl_msg *msg, void *arg)
+{
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ struct wprobe_request_cb *cb = arg;
+ struct wprobe_attribute *attr;
+ int type, id;
+
+ nla_parse(tb, WPROBE_ATTR_LAST, genlmsg_attrdata(gnlh, 0),
+ genlmsg_attrlen(gnlh, 0), attribute_policy);
+
+ if (!tb[WPROBE_ATTR_ID])
+ return -1;
+
+ if (!tb[WPROBE_ATTR_TYPE])
+ return -1;
+
+ id = nla_get_u32(tb[WPROBE_ATTR_ID]);
+ list_for_each_entry(attr, &cb->old_list, list) {
+ if (attr->id == id)
+ goto found;
+ }
+ /* not found */
+ return -1;
+
+found:
+ list_del_init(&attr->list);
+
+ type = nla_get_u8(tb[WPROBE_ATTR_TYPE]);
+ if (type != attr->type) {
+ DPRINTF("WARNING: type mismatch for %s attribute '%s' (%d != %d)\n",
+ (cb->addr ? "link" : "global"),
+ attr->name,
+ type, attr->type);
+ goto out;
+ }
+
+ if ((type < WPROBE_VAL_STRING) ||
+ (type > WPROBE_VAL_U64))
+ goto out;
+
+ memset(&attr->val, 0, sizeof(attr->val));
+
+#define HANDLE_INT_TYPE(_idx, _type) \
+ case WPROBE_VAL_S##_type: \
+ case WPROBE_VAL_U##_type: \
+ attr->val.U##_type = nla_get_u##_type(tb[_idx]); \
+ break
+
+ switch(type) {
+ HANDLE_INT_TYPE(type, 8);
+ HANDLE_INT_TYPE(type, 16);
+ HANDLE_INT_TYPE(type, 32);
+ HANDLE_INT_TYPE(type, 64);
+ case WPROBE_VAL_STRING:
+ /* unimplemented */
+ break;
+ }
+#undef HANDLE_TYPE
+
+ if (attr->flags & WPROBE_F_KEEPSTAT) {
+ if (tb[WPROBE_VAL_SUM])
+ attr->val.s = nla_get_u64(tb[WPROBE_VAL_SUM]);
+
+ if (tb[WPROBE_VAL_SUM_SQ])
+ attr->val.ss = nla_get_u64(tb[WPROBE_VAL_SUM_SQ]);
+
+ if (tb[WPROBE_VAL_SAMPLES])
+ attr->val.n = nla_get_u32(tb[WPROBE_VAL_SAMPLES]);
+
+ if (attr->val.n > 0) {
+ float avg = ((float) attr->val.s) / attr->val.n;
+ float stdev = sqrt((((float) attr->val.ss) / attr->val.n) - (avg * avg));
+ if (isnan(stdev))
+ stdev = 0.0f;
+ if (isnan(avg))
+ avg = 0.0f;
+ attr->val.avg = avg;
+ attr->val.stdev = stdev;
+ }
+ }
+
+out:
+ list_add_tail(&attr->list, cb->list);
+ return 0;
+}
+
+
+int
+wprobe_request_data(struct wprobe_iface *dev, const unsigned char *addr)
+{
+ struct wprobe_request_cb cb;
+ struct list_head *attrs;
+ struct nl_msg *msg;
+ int err;
+
+ msg = wprobe_new_msg(dev, WPROBE_CMD_GET_INFO, true);
+ if (!msg)
+ return -ENOMEM;
+
+ if (addr) {
+ attrs = &dev->link_attr;
+ NLA_PUT(msg, WPROBE_ATTR_MAC, 6, addr);
+ } else {
+ attrs = &dev->global_attr;
+ }
+
+ INIT_LIST_HEAD(&cb.old_list);
+ list_splice_init(attrs, &cb.old_list);
+ cb.list = attrs;
+
+ err = dev->ops->send_msg(dev, msg, save_attrdata_handler, &cb);
+ list_splice(&cb.old_list, attrs->prev);
+ return err;
+
+nla_put_failure:
+ nlmsg_free(msg);
+ return -ENOMEM;
+}
+
+
--- /dev/null
+/*
+ * wprobe-test.c: Wireless probe user space test code
+ * Copyright (C) 2008-2009 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <arpa/inet.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <stdint.h>
+#include <getopt.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <netdb.h>
+#include <fcntl.h>
+#include <signal.h>
+
+#include <linux/wprobe.h>
+#include "wprobe.h"
+
+static bool simple_mode = false;
+
+static const char *
+wprobe_dump_value(struct wprobe_attribute *attr)
+{
+ static char buf[128];
+
+#define HANDLE_TYPE(_type, _format) \
+ case WPROBE_VAL_##_type: \
+ snprintf(buf, sizeof(buf), _format, attr->val._type); \
+ break
+
+ switch(attr->type) {
+ HANDLE_TYPE(S8, "%d");
+ HANDLE_TYPE(S16, "%d");
+ HANDLE_TYPE(S32, "%d");
+ HANDLE_TYPE(S64, "%lld");
+ HANDLE_TYPE(U8, "%d");
+ HANDLE_TYPE(U16, "%d");
+ HANDLE_TYPE(U32, "%d");
+ HANDLE_TYPE(U64, "%lld");
+ case WPROBE_VAL_STRING:
+ /* FIXME: implement this */
+ default:
+ strncpy(buf, "<unknown>", sizeof(buf));
+ break;
+ }
+ if ((attr->flags & WPROBE_F_KEEPSTAT) &&
+ (attr->val.n > 0)) {
+ int len = strlen(buf);
+ if (simple_mode)
+ snprintf(buf + len, sizeof(buf) - len, ";%.02f;%.02f;%d;%lld;%lld", attr->val.avg, attr->val.stdev, attr->val.n, attr->val.s, attr->val.ss);
+ else
+ snprintf(buf + len, sizeof(buf) - len, " (avg: %.02f; stdev: %.02f, n=%d)", attr->val.avg, attr->val.stdev, attr->val.n);
+ }
+#undef HANDLE_TYPE
+
+ return buf;
+}
+
+
+static void
+wprobe_dump_data(struct wprobe_iface *dev)
+{
+ struct wprobe_attribute *attr;
+ struct wprobe_link *link;
+ bool first = true;
+
+ if (!simple_mode)
+ fprintf(stderr, "\n");
+ wprobe_request_data(dev, NULL);
+ list_for_each_entry(attr, &dev->global_attr, list) {
+ if (simple_mode) {
+ if (first)
+ fprintf(stdout, "[global]\n");
+ fprintf(stdout, "%s=%s\n", attr->name, wprobe_dump_value(attr));
+ } else {
+ fprintf(stderr, (first ?
+ "Global: %s=%s\n" :
+ " %s=%s\n"),
+ attr->name,
+ wprobe_dump_value(attr)
+ );
+ }
+ first = false;
+ }
+
+ list_for_each_entry(link, &dev->links, list) {
+ first = true;
+ wprobe_request_data(dev, link->addr);
+ list_for_each_entry(attr, &dev->link_attr, list) {
+ if (first) {
+ fprintf((simple_mode ? stdout : stderr),
+ (simple_mode ?
+ "[%02x:%02x:%02x:%02x:%02x:%02x]\n%s=%s\n" :
+ "%02x:%02x:%02x:%02x:%02x:%02x: %s=%s\n"),
+ link->addr[0], link->addr[1], link->addr[2],
+ link->addr[3], link->addr[4], link->addr[5],
+ attr->name,
+ wprobe_dump_value(attr));
+ first = false;
+ } else {
+ fprintf((simple_mode ? stdout : stderr),
+ (simple_mode ? "%s=%s\n" :
+ " %s=%s\n"),
+ attr->name,
+ wprobe_dump_value(attr));
+ }
+ }
+ }
+ fflush(stdout);
+}
+
+static const char *attr_typestr[] = {
+ [0] = "Unknown",
+ [WPROBE_VAL_STRING] = "String",
+ [WPROBE_VAL_U8] = "Unsigned 8 bit",
+ [WPROBE_VAL_U16] = "Unsigned 16 bit",
+ [WPROBE_VAL_U32] = "Unsigned 32 bit",
+ [WPROBE_VAL_U64] = "Unsigned 64 bit",
+ [WPROBE_VAL_S8] = "Signed 8 bit",
+ [WPROBE_VAL_S16] = "Signed 16 bit",
+ [WPROBE_VAL_S32] = "Signed 32 bit",
+ [WPROBE_VAL_S64] = "Signed 64 bit",
+};
+
+static int usage(const char *prog)
+{
+ fprintf(stderr,
+#ifndef NO_LOCAL_ACCESS
+ "Usage: %s <interface>|<host>:<device>|-P [options]\n"
+#else
+ "Usage: %s <host>:<device> [options]\n"
+#endif
+ "\n"
+ "Options:\n"
+ " -c: Only apply configuration\n"
+ " -d: Delay between measurement dumps (in milliseconds, default: 1000)\n"
+ " -f: Dump contents of layer 2 filter counters during measurement\n"
+ " -F <file>: Apply layer 2 filters from <file>\n"
+ " -h: This help text\n"
+ " -i <interval>: Set measurement interval\n"
+ " -m: Run measurement loop\n"
+ " -p: Set the TCP port for server/client (default: 17990)\n"
+#ifndef NO_LOCAL_ACCESS
+ " -P: Run in proxy mode (listen on network)\n"
+#endif
+ "\n"
+ , prog);
+ exit(1);
+}
+
+static void show_attributes(struct wprobe_iface *dev)
+{
+ struct wprobe_attribute *attr;
+ if (simple_mode)
+ return;
+ list_for_each_entry(attr, &dev->global_attr, list) {
+ fprintf(stderr, "Global attribute: '%s' (%s)\n",
+ attr->name, attr_typestr[attr->type]);
+ }
+ list_for_each_entry(attr, &dev->link_attr, list) {
+ fprintf(stderr, "Link attribute: '%s' (%s)\n",
+ attr->name, attr_typestr[attr->type]);
+ }
+}
+
+static void show_filter_simple(void *arg, const char *group, struct wprobe_filter_item *items, int n_items)
+{
+ int i;
+
+ fprintf(stdout, "[filter:%s]\n", group);
+ for (i = 0; i < n_items; i++) {
+ fprintf(stdout, "%s=%lld;%lld\n",
+ items[i].name, items[i].tx, items[i].rx);
+ }
+ fflush(stdout);
+}
+
+
+static void show_filter(void *arg, const char *group, struct wprobe_filter_item *items, int n_items)
+{
+ int i;
+ fprintf(stderr, "Filter group: '%s' (tx/rx)\n", group);
+ for (i = 0; i < n_items; i++) {
+ fprintf(stderr, " - %s (%lld/%lld)\n",
+ items[i].name, items[i].tx, items[i].rx);
+ }
+}
+
+static void loop_measurement(struct wprobe_iface *dev, bool print_filters, unsigned long delay)
+{
+ while (1) {
+ usleep(delay * 1000);
+ wprobe_update_links(dev);
+ wprobe_dump_data(dev);
+ if (print_filters)
+ wprobe_dump_filters(dev, simple_mode ? show_filter_simple : show_filter, NULL);
+ }
+}
+
+static void set_filter(struct wprobe_iface *dev, const char *filename)
+{
+ unsigned char *buf = NULL;
+ unsigned int buflen = 0;
+ unsigned int len = 0;
+ int fd;
+
+ /* clear filter */
+ if (filename[0] == 0) {
+ dev->filter_len = -1;
+ return;
+ }
+
+ fd = open(filename, O_RDONLY);
+ if (fd < 0) {
+ perror("open filter");
+ return;
+ }
+
+ do {
+ int rlen;
+
+ if (!buf) {
+ len = 0;
+ buflen = 1024;
+ buf = malloc(1024);
+ } else {
+ buflen *= 2;
+ buf = realloc(buf, buflen);
+ }
+ rlen = read(fd, buf + len, buflen - len);
+ if (rlen < 0)
+ break;
+
+ len += rlen;
+ } while (len == buflen);
+
+ dev->filter = buf;
+ dev->filter_len = len;
+ close(fd);
+}
+
+#ifndef NO_LOCAL_ACCESS
+
+static void sigchld_handler(int s)
+{
+ while (waitpid(-1, NULL, WNOHANG) > 0);
+}
+
+static int run_proxy(int port)
+{
+ struct sockaddr_in sa;
+ struct sigaction sig;
+ int v = 1;
+ int s;
+
+ s = socket(AF_INET, SOCK_STREAM, 0);
+ if (s < 0) {
+ perror("socket");
+ return 1;
+ }
+
+ sig.sa_handler = sigchld_handler; // Signal Handler fuer Zombie Prozesse
+ sigemptyset(&sig.sa_mask);
+ sig.sa_flags = SA_RESTART;
+ sigaction(SIGCHLD, &sig, NULL);
+
+ memset(&sa, 0, sizeof(sa));
+ sa.sin_family = AF_INET;
+ sa.sin_addr.s_addr = htonl(INADDR_ANY);
+ sa.sin_port = htons(wprobe_port);
+
+ setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &v, sizeof(v));
+ if (bind(s, (struct sockaddr *) &sa, sizeof(sa)) < 0) {
+ perror("bind");
+ return 1;
+ }
+ if (listen(s, 10)) {
+ perror("listen");
+ return 1;
+ }
+ while(1) {
+ unsigned int addrlen;
+ int ret, c;
+
+ c = accept(s, (struct sockaddr *)&sa, &addrlen);
+ if (c < 0) {
+ if (errno == EINTR)
+ continue;
+
+ perror("accept");
+ return 1;
+ }
+ if (fork() == 0) {
+ /* close server socket, stdin, stdout, stderr */
+ close(s);
+ close(0);
+ close(1);
+ close(2);
+
+ wprobe_server_init(c);
+ do {
+ ret = wprobe_server_handle(c);
+ } while (ret >= 0);
+ wprobe_server_done();
+ close(c);
+ exit(0);
+ }
+ close(c);
+ }
+
+ return 0;
+}
+#endif
+
+int main(int argc, char **argv)
+{
+ struct wprobe_iface *dev = NULL;
+ const char *ifname;
+ const char *prog = argv[0];
+ char *err = NULL;
+ enum {
+ CMD_NONE,
+ CMD_CONFIG,
+ CMD_MEASURE,
+ CMD_PROXY,
+ } cmd = CMD_NONE;
+ const char *filter = NULL;
+ bool print_filters = false;
+ unsigned long delay = 1000;
+ int interval = -1;
+ int ch;
+
+ if (argc < 2)
+ return usage(prog);
+
+#ifndef NO_LOCAL_ACCESS
+ if (!strcmp(argv[1], "-P")) {
+ while ((ch = getopt(argc - 1, argv + 1, "p:")) != -1) {
+ switch(ch) {
+ case 'p':
+ /* set port */
+ wprobe_port = strtoul(optarg, NULL, 0);
+ break;
+ default:
+ return usage(prog);
+ }
+ }
+ return run_proxy(wprobe_port);
+ }
+#endif
+
+ if (argv[1][0] == '-')
+ return usage(prog);
+
+ ifname = argv[1];
+ argv++;
+ argc--;
+
+ while ((ch = getopt(argc, argv, "cd:fF:hi:msp:")) != -1) {
+ switch(ch) {
+ case 'c':
+ cmd = CMD_CONFIG;
+ break;
+ case 'd':
+ delay = strtoul(optarg, NULL, 10);
+ break;
+ case 'm':
+ cmd = CMD_MEASURE;
+ break;
+ case 'i':
+ interval = strtoul(optarg, NULL, 10);
+ break;
+ case 'f':
+ print_filters = true;
+ break;
+ case 'F':
+ if (filter) {
+ fprintf(stderr, "Cannot set multiple filters\n");
+ return usage(prog);
+ }
+ filter = optarg;
+ break;
+ case 's':
+ simple_mode = true;
+ break;
+ case 'p':
+ /* set port */
+ wprobe_port = strtoul(optarg, NULL, 0);
+ break;
+ case 'h':
+ default:
+ usage(prog);
+ break;
+ }
+ }
+
+ dev = wprobe_get_auto(ifname, &err);
+ if (!dev || (list_empty(&dev->global_attr) &&
+ list_empty(&dev->link_attr))) {
+ if (err)
+ fprintf(stderr, "%s\n", err);
+ else
+ fprintf(stderr, "Interface '%s' not found\n", ifname);
+ return 1;
+ }
+
+ if (filter || interval >= 0) {
+ if (filter)
+ set_filter(dev, filter);
+ if (interval >= 0)
+ dev->interval = interval;
+
+ wprobe_apply_config(dev);
+ }
+
+ if (cmd != CMD_CONFIG)
+ show_attributes(dev);
+ if (cmd == CMD_MEASURE)
+ loop_measurement(dev, print_filters, delay);
+
+ wprobe_free_dev(dev);
+
+ return 0;
+}
+++ /dev/null
-/*
- * wprobe.c: Wireless probe user space library
- * Copyright (C) 2008-2009 Felix Fietkau <nbd@openwrt.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <getopt.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <math.h>
-#include <linux/wprobe.h>
-#include <netlink/netlink.h>
-#include <netlink/genl/genl.h>
-#include <netlink/genl/ctrl.h>
-#include <netlink/genl/family.h>
-#include "wprobe.h"
-
-#define DEBUG 1
-#ifdef DEBUG
-#define DPRINTF(fmt, ...) fprintf(stderr, "%s(%d): " fmt, __func__, __LINE__, ##__VA_ARGS__)
-#else
-#define DPRINTF(fmt, ...) do {} while (0)
-#endif
-
-static int n_devs = 0;
-static struct nl_sock *handle = NULL;
-static struct nl_cache *cache = NULL;
-static struct genl_family *family = NULL;
-static struct nlattr *tb[WPROBE_ATTR_LAST+1];
-static struct nla_policy attribute_policy[WPROBE_ATTR_LAST+1] = {
- [WPROBE_ATTR_ID] = { .type = NLA_U32 },
- [WPROBE_ATTR_MAC] = { .type = NLA_UNSPEC, .minlen = 6, .maxlen = 6 },
- [WPROBE_ATTR_NAME] = { .type = NLA_STRING },
- [WPROBE_ATTR_FLAGS] = { .type = NLA_U32 },
- [WPROBE_ATTR_TYPE] = { .type = NLA_U8 },
- [WPROBE_VAL_S8] = { .type = NLA_U8 },
- [WPROBE_VAL_S16] = { .type = NLA_U16 },
- [WPROBE_VAL_S32] = { .type = NLA_U32 },
- [WPROBE_VAL_S64] = { .type = NLA_U64 },
- [WPROBE_VAL_U8] = { .type = NLA_U8 },
- [WPROBE_VAL_U16] = { .type = NLA_U16 },
- [WPROBE_VAL_U32] = { .type = NLA_U32 },
- [WPROBE_VAL_U64] = { .type = NLA_U64 },
- [WPROBE_VAL_SUM] = { .type = NLA_U64 },
- [WPROBE_VAL_SUM_SQ] = { .type = NLA_U64 },
- [WPROBE_VAL_SAMPLES] = { .type = NLA_U32 },
-};
-
-static int
-error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
-{
- int *ret = arg;
- *ret = err->error;
- return NL_STOP;
-}
-
-static int
-finish_handler(struct nl_msg *msg, void *arg)
-{
- int *ret = arg;
- *ret = 0;
- return NL_SKIP;
-}
-
-static int
-ack_handler(struct nl_msg *msg, void *arg)
-{
- int *ret = arg;
- *ret = 0;
- return NL_STOP;
-}
-
-
-static void
-wprobe_free(void)
-{
- /* should not happen */
- if (n_devs == 0)
- return;
-
- if (--n_devs != 0)
- return;
-
- if (cache)
- nl_cache_free(cache);
- if (handle)
- nl_socket_free(handle);
- handle = NULL;
- cache = NULL;
-}
-
-static int
-wprobe_init(void)
-{
- int ret;
-
- if (n_devs++ > 0)
- return 0;
-
- handle = nl_socket_alloc();
- if (!handle) {
- DPRINTF("Failed to create handle\n");
- goto err;
- }
-
- if (genl_connect(handle)) {
- DPRINTF("Failed to connect to generic netlink\n");
- goto err;
- }
-
- ret = genl_ctrl_alloc_cache(handle, &cache);
- if (ret < 0) {
- DPRINTF("Failed to allocate netlink cache\n");
- goto err;
- }
-
- family = genl_ctrl_search_by_name(cache, "wprobe");
- if (!family) {
- DPRINTF("wprobe API not present\n");
- goto err;
- }
- return 0;
-
-err:
- wprobe_free();
- return -EINVAL;
-}
-
-
-static struct nl_msg *
-wprobe_new_msg(const char *ifname, int cmd, bool dump)
-{
- struct nl_msg *msg;
- uint32_t flags = 0;
-
- msg = nlmsg_alloc();
- if (!msg)
- return NULL;
-
- if (dump)
- flags |= NLM_F_DUMP;
-
- genlmsg_put(msg, 0, 0, genl_family_get_id(family),
- 0, flags, cmd, 0);
-
- NLA_PUT_STRING(msg, WPROBE_ATTR_INTERFACE, ifname);
-nla_put_failure:
- return msg;
-}
-
-static int
-wprobe_send_msg(struct nl_msg *msg, void *callback, void *arg)
-{
- struct nl_cb *cb;
- int err = 0;
-
- cb = nl_cb_alloc(NL_CB_DEFAULT);
- if (!cb)
- goto out_no_cb;
-
- if (callback)
- nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, callback, arg);
-
- err = nl_send_auto_complete(handle, msg);
- if (err < 0)
- goto out;
-
- err = 1;
-
- nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
- nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
- nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
-
- while (err > 0)
- nl_recvmsgs(handle, cb);
-
-out:
- nl_cb_put(cb);
-out_no_cb:
- nlmsg_free(msg);
- return err;
-}
-
-struct wprobe_attr_cb {
- struct list_head *list;
- char *addr;
-};
-
-static int
-save_attribute_handler(struct nl_msg *msg, void *arg)
-{
- struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
- const char *name = "N/A";
- struct wprobe_attribute *attr;
- int type = 0;
- struct wprobe_attr_cb *cb = arg;
-
- nla_parse(tb, WPROBE_ATTR_LAST, genlmsg_attrdata(gnlh, 0),
- genlmsg_attrlen(gnlh, 0), attribute_policy);
-
- if (tb[WPROBE_ATTR_NAME])
- name = nla_data(tb[WPROBE_ATTR_NAME]);
-
- attr = malloc(sizeof(struct wprobe_attribute) + strlen(name) + 1);
- if (!attr)
- return -1;
-
- memset(attr, 0, sizeof(struct wprobe_attribute));
-
- if (tb[WPROBE_ATTR_ID])
- attr->id = nla_get_u32(tb[WPROBE_ATTR_ID]);
-
- if (tb[WPROBE_ATTR_MAC] && cb->addr)
- memcpy(cb->addr, nla_data(tb[WPROBE_ATTR_MAC]), 6);
-
- if (tb[WPROBE_ATTR_FLAGS])
- attr->flags = nla_get_u32(tb[WPROBE_ATTR_FLAGS]);
-
- if (tb[WPROBE_ATTR_TYPE])
- type = nla_get_u8(tb[WPROBE_ATTR_TYPE]);
-
- if ((type < WPROBE_VAL_STRING) ||
- (type > WPROBE_VAL_U64))
- type = 0;
-
- attr->type = type;
- strcpy(attr->name, name);
- INIT_LIST_HEAD(&attr->list);
- list_add(&attr->list, cb->list);
- return 0;
-}
-
-
-static int
-dump_attributes(const char *ifname, bool link, struct list_head *list, char *addr)
-{
- struct nl_msg *msg;
- struct wprobe_attr_cb cb;
-
- cb.list = list;
- cb.addr = addr;
- msg = wprobe_new_msg(ifname, WPROBE_CMD_GET_LIST, true);
- if (!msg)
- return -ENOMEM;
-
- if (link)
- NLA_PUT(msg, WPROBE_ATTR_MAC, 6, "\x00\x00\x00\x00\x00\x00");
-
- return wprobe_send_msg(msg, save_attribute_handler, &cb);
-
-nla_put_failure:
- nlmsg_free(msg);
- return -EINVAL;
-}
-
-struct wprobe_iface *
-wprobe_get_dev(const char *ifname)
-{
- struct wprobe_iface *dev;
-
- if (wprobe_init() != 0)
- return NULL;
-
- dev = malloc(sizeof(struct wprobe_iface));
- if (!dev)
- return NULL;
-
- memset(dev, 0, sizeof(struct wprobe_iface));
- dev->ifname = strdup(ifname);
- if (!dev->ifname)
- goto error;
-
- dev->interval = -1;
- dev->scale_min = -1;
- dev->scale_max = -1;
- dev->scale_m = -1;
- dev->scale_d = -1;
-
- INIT_LIST_HEAD(&dev->global_attr);
- INIT_LIST_HEAD(&dev->link_attr);
- INIT_LIST_HEAD(&dev->links);
-
- dump_attributes(ifname, false, &dev->global_attr, NULL);
- dump_attributes(ifname, true, &dev->link_attr, NULL);
-
- return dev;
-
-error:
- free(dev);
- return NULL;
-}
-
-static void
-free_attr_list(struct list_head *list)
-{
- struct wprobe_attribute *attr, *tmp;
-
- list_for_each_entry_safe(attr, tmp, list, list) {
- list_del(&attr->list);
- free(attr);
- }
-}
-
-void
-wprobe_free_dev(struct wprobe_iface *dev)
-{
- wprobe_free();
- free_attr_list(&dev->global_attr);
- free_attr_list(&dev->link_attr);
- free((void *)dev->ifname);
- free(dev);
-}
-
-static struct wprobe_link *
-get_link(struct list_head *list, const char *addr)
-{
- struct wprobe_link *l;
-
- list_for_each_entry(l, list, list) {
- if (!memcmp(l->addr, addr, 6)) {
- list_del_init(&l->list);
- goto out;
- }
- }
-
- /* no previous link found, allocate a new one */
- l = malloc(sizeof(struct wprobe_link));
- if (!l)
- goto out;
-
- memset(l, 0, sizeof(struct wprobe_link));
- memcpy(l->addr, addr, sizeof(l->addr));
- INIT_LIST_HEAD(&l->list);
-
-out:
- return l;
-}
-
-struct wprobe_save_cb {
- struct list_head *list;
- struct list_head old_list;
-};
-
-static int
-save_link_handler(struct nl_msg *msg, void *arg)
-{
- struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
- struct wprobe_link *link;
- struct wprobe_save_cb *cb = arg;
- const char *addr;
-
- nla_parse(tb, WPROBE_ATTR_LAST, genlmsg_attrdata(gnlh, 0),
- genlmsg_attrlen(gnlh, 0), attribute_policy);
-
- if (!tb[WPROBE_ATTR_MAC] || (nla_len(tb[WPROBE_ATTR_MAC]) != 6))
- return -1;
-
- addr = nla_data(tb[WPROBE_ATTR_MAC]);
- link = get_link(&cb->old_list, addr);
- if (!link)
- return -1;
-
- if (tb[WPROBE_ATTR_FLAGS])
- link->flags = nla_get_u32(tb[WPROBE_ATTR_FLAGS]);
-
- list_add_tail(&link->list, cb->list);
- return 0;
-}
-
-
-int
-wprobe_update_links(struct wprobe_iface *dev)
-{
- struct wprobe_link *l, *tmp;
- struct nl_msg *msg;
- struct wprobe_save_cb cb;
- int err;
-
- INIT_LIST_HEAD(&cb.old_list);
- list_splice_init(&dev->links, &cb.old_list);
- cb.list = &dev->links;
-
- msg = wprobe_new_msg(dev->ifname, WPROBE_CMD_GET_LINKS, true);
- if (!msg)
- return -ENOMEM;
-
- err = wprobe_send_msg(msg, save_link_handler, &cb);
- if (err < 0)
- return err;
-
- list_for_each_entry_safe(l, tmp, &cb.old_list, list) {
- list_del(&l->list);
- free(l);
- }
-
- return 0;
-}
-
-int
-wprobe_apply_config(struct wprobe_iface *dev)
-{
- struct nl_msg *msg;
-
- msg = wprobe_new_msg(dev->ifname, WPROBE_CMD_CONFIG, false);
- if (!msg)
- return -ENOMEM;
-
- if (dev->interval >= 0)
- NLA_PUT_MSECS(msg, WPROBE_ATTR_INTERVAL, dev->interval);
-
- wprobe_send_msg(msg, NULL, NULL);
- return 0;
-
-nla_put_failure:
- nlmsg_free(msg);
- return -ENOMEM;
-}
-
-int
-wprobe_measure(struct wprobe_iface *dev)
-{
- struct nl_msg *msg;
-
- msg = wprobe_new_msg(dev->ifname, WPROBE_CMD_MEASURE, false);
- if (!msg)
- return -ENOMEM;
-
- wprobe_send_msg(msg, NULL, NULL);
- return 0;
-}
-
-struct wprobe_request_cb {
- struct list_head *list;
- struct list_head old_list;
- char *addr;
-};
-
-static int
-save_attrdata_handler(struct nl_msg *msg, void *arg)
-{
- struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
- struct wprobe_request_cb *cb = arg;
- struct wprobe_attribute *attr;
- int type, id;
-
- nla_parse(tb, WPROBE_ATTR_LAST, genlmsg_attrdata(gnlh, 0),
- genlmsg_attrlen(gnlh, 0), attribute_policy);
-
- if (!tb[WPROBE_ATTR_ID])
- return -1;
-
- if (!tb[WPROBE_ATTR_TYPE])
- return -1;
-
- id = nla_get_u32(tb[WPROBE_ATTR_ID]);
- list_for_each_entry(attr, &cb->old_list, list) {
- if (attr->id == id)
- goto found;
- }
- /* not found */
- return -1;
-
-found:
- list_del_init(&attr->list);
-
- type = nla_get_u8(tb[WPROBE_ATTR_TYPE]);
- if (type != attr->type) {
- DPRINTF("WARNING: type mismatch for %s attribute '%s' (%d != %d)\n",
- (cb->addr ? "link" : "global"),
- attr->name,
- type, attr->type);
- goto out;
- }
-
- if ((type < WPROBE_VAL_STRING) ||
- (type > WPROBE_VAL_U64))
- goto out;
-
- memset(&attr->val, 0, sizeof(attr->val));
-
-#define HANDLE_INT_TYPE(_idx, _type) \
- case WPROBE_VAL_S##_type: \
- case WPROBE_VAL_U##_type: \
- attr->val.U##_type = nla_get_u##_type(tb[_idx]); \
- break
-
- switch(type) {
- HANDLE_INT_TYPE(type, 8);
- HANDLE_INT_TYPE(type, 16);
- HANDLE_INT_TYPE(type, 32);
- HANDLE_INT_TYPE(type, 64);
- case WPROBE_VAL_STRING:
- /* unimplemented */
- break;
- }
-#undef HANDLE_TYPE
-
- if (attr->flags & WPROBE_F_KEEPSTAT) {
- if (tb[WPROBE_VAL_SUM])
- attr->val.s = nla_get_u64(tb[WPROBE_VAL_SUM]);
-
- if (tb[WPROBE_VAL_SUM_SQ])
- attr->val.ss = nla_get_u64(tb[WPROBE_VAL_SUM_SQ]);
-
- if (tb[WPROBE_VAL_SAMPLES])
- attr->val.n = nla_get_u32(tb[WPROBE_VAL_SAMPLES]);
-
- if (attr->val.n > 0) {
- float avg = ((float) attr->val.s) / attr->val.n;
- float stdev = sqrt((((float) attr->val.ss) / attr->val.n) - (avg * avg));
- if (isnan(stdev))
- stdev = 0.0f;
- if (isnan(avg))
- avg = 0.0f;
- attr->val.avg = avg;
- attr->val.stdev = stdev;
- }
- }
-
-out:
- list_add_tail(&attr->list, cb->list);
- return 0;
-}
-
-
-int
-wprobe_request_data(struct wprobe_iface *dev, const unsigned char *addr)
-{
- struct wprobe_request_cb cb;
- struct list_head *attrs;
- struct nl_msg *msg;
- int err;
-
- msg = wprobe_new_msg(dev->ifname, WPROBE_CMD_GET_INFO, true);
- if (!msg)
- return -ENOMEM;
-
- if (addr) {
- attrs = &dev->link_attr;
- NLA_PUT(msg, WPROBE_ATTR_MAC, 6, addr);
- } else {
- attrs = &dev->global_attr;
- }
-
- INIT_LIST_HEAD(&cb.old_list);
- list_splice_init(attrs, &cb.old_list);
- cb.list = attrs;
-
- err = wprobe_send_msg(msg, save_attrdata_handler, &cb);
- list_splice(&cb.old_list, attrs->prev);
- return err;
-
-nla_put_failure:
- nlmsg_free(msg);
- return -ENOMEM;
-}
-
-
unsigned char addr[6];
};
+struct wprobe_filter_item {
+ char name[32];
+ uint64_t rx;
+ uint64_t tx;
+};
+
+struct wprobe_iface_ops;
struct wprobe_iface {
+ const struct wprobe_iface_ops *ops;
+
+ int sockfd;
const char *ifname;
+ unsigned int genl_family;
char addr[6];
struct list_head global_attr;
int scale_max;
int scale_m;
int scale_d;
+
+ /* filter */
+ void *filter;
+
+ /* filter_len:
+ * set to -1 to drop the current filter
+ * automatically reset to 0 after config apply
+ */
+ int filter_len;
};
+typedef void (*wprobe_filter_cb)(void *arg, const char *group, struct wprobe_filter_item *items, int n_items);
+extern int wprobe_port;
+
/**
* wprobe_update_links: get a list of all link partners
- * @ifname: name of the wprobe interface
+ * @dev: wprobe device structure
* @list: linked list for storing link descriptions
*
* when wprobe_update_links is called multiple times, the linked list
*/
extern int wprobe_update_links(struct wprobe_iface *dev);
+/**
+ * wprobe_dump_filters: dump all layer 2 filter counters
+ * @dev: wprobe device structure
+ * @cb: callback (called once per filter group)
+ * @arg: user argument for the callback
+ */
+extern int wprobe_dump_filters(struct wprobe_iface *dev, wprobe_filter_cb cb, void *arg);
+
/**
* wprobe_measure: start a measurement request for all global attributes
- * @ifname: name of the wprobe interface
+ * @dev: wprobe device structure
*
* not all attributes are automatically filled with data, since for some
* it may be desirable to control the sampling interval from user space
extern int wprobe_measure(struct wprobe_iface *dev);
/**
- * wprobe_get_dev: get device information
+ * wprobe_get_dev: get a handle to a local wprobe device
* @ifname: name of the wprobe interface
*
* queries the wprobe interface for all attributes
*/
extern struct wprobe_iface *wprobe_get_dev(const char *ifname);
+/**
+ * wprobe_get_auto: get a handle to a local or remote wprobe device
+ * @arg: pointer to the wprobe device, either <dev> (local) or <host>:<dev> (remote)
+ */
+extern struct wprobe_iface *wprobe_get_auto(const char *arg, char **err);
+
/**
* wprobe_get_dev: free all device information
* @dev: wprobe device structure
*/
extern int wprobe_request_data(struct wprobe_iface *dev, const unsigned char *addr);
+/**
+ * wprobe_server_init: send a wprobe server init message to a server's client socket
+ * @socket: socket of the connection to the client
+ */
+extern int wprobe_server_init(int socket);
+
+/**
+ * wprobe_server_handle: read a request from the client socket, process it, send the response
+ * @socket: socket of the connection to the client
+ */
+extern int wprobe_server_handle(int socket);
+
+/**
+ * wprobe_server_done: release memory allocated for the server connection
+ */
+extern void wprobe_server_done(void);
+
#endif
projects / openwrt / openwrt.git / commitdiff