Merge remote-tracking branch 'goog/tcpdump'
* goog/tcpdump: (1872 commits)
Remove old version. Getting ready for new libpcap 1.5
Remove commas from clauses in a comma-separated list.
Fix typo.
Describe all NFLOG TLV types and define structures for some of them.
Check caplen in the NFLOG TLV loop.
Have nflog_tlv_t include only the TLV header.
Byte-swap the T and L in TLVs as necessary when reading an NFLOG file.
Don't support D-Bus sniffing on OS X.
Add post-1.5.2 bug fixes.
Tag some changes with a bug identifier.
Add items for 1.5.1 and 1.5.2.
Formatting tweak.
Count *ring buffer blocks*, not *packets* to be filtered in userland.
Add a PACKET_COUNT_IS_UNLIMITED() to test for a packet count <= 0.
Use HAVE_TPACKET3 rather than TPACKET_V3 to test for TPACKET_V3 support.
Fix builds on systems without TPACKET_V3.
tweak manpages formatting
Fix pcap_loop() with a count of 0 and TPACKET_V3.
Discourage the use of a zero timeout.
We can't use TPACKET_V3 in immediate mode, so fall back on TPACKET_V2.
...
Change-Id: I2aa9bd87673c56aee439e1154b96a14026ca7985
diff --git a/pcap-bt-linux.c b/pcap-bt-linux.c
new file mode 100644
index 0000000..6435bcf
--- /dev/null
+++ b/pcap-bt-linux.c
@@ -0,0 +1,415 @@
+/*
+ * Copyright (c) 2006 Paolo Abeni (Italy)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ * products derived from this software without specific prior written
+ * permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Bluetooth sniffing API implementation for Linux platform
+ * By Paolo Abeni <paolo.abeni@email.it>
+ *
+ */
+#ifndef lint
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/libpcap/pcap-bt-linux.c,v 1.15 2008-07-01 07:05:54 guy Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "pcap-int.h"
+#include "pcap-bt-linux.h"
+#include "pcap/bluetooth.h"
+
+#ifdef NEED_STRERROR_H
+#include "strerror.h"
+#endif
+
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+
+#include <bluetooth/bluetooth.h>
+#include <bluetooth/hci.h>
+
+#define BT_IFACE "bluetooth"
+#define BT_CTRL_SIZE 128
+
+/* forward declaration */
+static int bt_activate(pcap_t *);
+static int bt_read_linux(pcap_t *, int , pcap_handler , u_char *);
+static int bt_inject_linux(pcap_t *, const void *, size_t);
+static int bt_setdirection_linux(pcap_t *, pcap_direction_t);
+static int bt_stats_linux(pcap_t *, struct pcap_stat *);
+
+/*
+ * Private data for capturing on Linux Bluetooth devices.
+ */
+struct pcap_bt {
+ int dev_id; /* device ID of device we're bound to */
+};
+
+int
+bt_findalldevs(pcap_if_t **alldevsp, char *err_str)
+{
+ struct hci_dev_list_req *dev_list;
+ struct hci_dev_req *dev_req;
+ int i, sock;
+ int ret = 0;
+
+ sock = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
+ if (sock < 0)
+ {
+ /* if bluetooth is not supported this this is not fatal*/
+ if (errno == EAFNOSUPPORT)
+ return 0;
+ snprintf(err_str, PCAP_ERRBUF_SIZE,
+ "Can't open raw Bluetooth socket: %s", strerror(errno));
+ return -1;
+ }
+
+ dev_list = malloc(HCI_MAX_DEV * sizeof(*dev_req) + sizeof(*dev_list));
+ if (!dev_list)
+ {
+ snprintf(err_str, PCAP_ERRBUF_SIZE, "Can't allocate %zu bytes for Bluetooth device list",
+ HCI_MAX_DEV * sizeof(*dev_req) + sizeof(*dev_list));
+ ret = -1;
+ goto done;
+ }
+
+ dev_list->dev_num = HCI_MAX_DEV;
+
+ if (ioctl(sock, HCIGETDEVLIST, (void *) dev_list) < 0)
+ {
+ snprintf(err_str, PCAP_ERRBUF_SIZE,
+ "Can't get Bluetooth device list via ioctl: %s",
+ strerror(errno));
+ ret = -1;
+ goto free;
+ }
+
+ dev_req = dev_list->dev_req;
+ for (i = 0; i < dev_list->dev_num; i++, dev_req++) {
+ char dev_name[20], dev_descr[30];
+
+ snprintf(dev_name, 20, BT_IFACE"%d", dev_req->dev_id);
+ snprintf(dev_descr, 30, "Bluetooth adapter number %d", i);
+
+ if (pcap_add_if(alldevsp, dev_name, 0,
+ dev_descr, err_str) < 0)
+ {
+ ret = -1;
+ break;
+ }
+
+ }
+
+free:
+ free(dev_list);
+
+done:
+ close(sock);
+ return ret;
+}
+
+pcap_t *
+bt_create(const char *device, char *ebuf, int *is_ours)
+{
+ const char *cp;
+ char *cpend;
+ long devnum;
+ pcap_t *p;
+
+ /* Does this look like a Bluetooth device? */
+ cp = strrchr(device, '/');
+ if (cp == NULL)
+ cp = device;
+ /* Does it begin with BT_IFACE? */
+ if (strncmp(cp, BT_IFACE, sizeof BT_IFACE - 1) != 0) {
+ /* Nope, doesn't begin with BT_IFACE */
+ *is_ours = 0;
+ return NULL;
+ }
+ /* Yes - is BT_IFACE followed by a number? */
+ cp += sizeof BT_IFACE - 1;
+ devnum = strtol(cp, &cpend, 10);
+ if (cpend == cp || *cpend != '\0') {
+ /* Not followed by a number. */
+ *is_ours = 0;
+ return NULL;
+ }
+ if (devnum < 0) {
+ /* Followed by a non-valid number. */
+ *is_ours = 0;
+ return NULL;
+ }
+
+ /* OK, it's probably ours. */
+ *is_ours = 1;
+
+ p = pcap_create_common(device, ebuf, sizeof (struct pcap_bt));
+ if (p == NULL)
+ return (NULL);
+
+ p->activate_op = bt_activate;
+ return (p);
+}
+
+static int
+bt_activate(pcap_t* handle)
+{
+ struct pcap_bt *handlep = handle->priv;
+ struct sockaddr_hci addr;
+ int opt;
+ int dev_id;
+ struct hci_filter flt;
+ int err = PCAP_ERROR;
+
+ /* get bt interface id */
+ if (sscanf(handle->opt.source, BT_IFACE"%d", &dev_id) != 1)
+ {
+ snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
+ "Can't get Bluetooth device index from %s",
+ handle->opt.source);
+ return PCAP_ERROR;
+ }
+
+ /* Initialize some components of the pcap structure. */
+ handle->bufsize = handle->snapshot+BT_CTRL_SIZE+sizeof(pcap_bluetooth_h4_header);
+ handle->offset = BT_CTRL_SIZE;
+ handle->linktype = DLT_BLUETOOTH_HCI_H4_WITH_PHDR;
+
+ handle->read_op = bt_read_linux;
+ handle->inject_op = bt_inject_linux;
+ handle->setfilter_op = install_bpf_program; /* no kernel filtering */
+ handle->setdirection_op = bt_setdirection_linux;
+ handle->set_datalink_op = NULL; /* can't change data link type */
+ handle->getnonblock_op = pcap_getnonblock_fd;
+ handle->setnonblock_op = pcap_setnonblock_fd;
+ handle->stats_op = bt_stats_linux;
+ handlep->dev_id = dev_id;
+
+ /* Create HCI socket */
+ handle->fd = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
+ if (handle->fd < 0) {
+ snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
+ "Can't create raw socket: %s", strerror(errno));
+ return PCAP_ERROR;
+ }
+
+ handle->buffer = malloc(handle->bufsize);
+ if (!handle->buffer) {
+ snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Can't allocate dump buffer: %s",
+ pcap_strerror(errno));
+ goto close_fail;
+ }
+
+ opt = 1;
+ if (setsockopt(handle->fd, SOL_HCI, HCI_DATA_DIR, &opt, sizeof(opt)) < 0) {
+ snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
+ "Can't enable data direction info: %s", strerror(errno));
+ goto close_fail;
+ }
+
+ opt = 1;
+ if (setsockopt(handle->fd, SOL_HCI, HCI_TIME_STAMP, &opt, sizeof(opt)) < 0) {
+ snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
+ "Can't enable time stamp: %s", strerror(errno));
+ goto close_fail;
+ }
+
+ /* Setup filter, do not call hci function to avoid dependence on
+ * external libs */
+ memset(&flt, 0, sizeof(flt));
+ memset((void *) &flt.type_mask, 0xff, sizeof(flt.type_mask));
+ memset((void *) &flt.event_mask, 0xff, sizeof(flt.event_mask));
+ if (setsockopt(handle->fd, SOL_HCI, HCI_FILTER, &flt, sizeof(flt)) < 0) {
+ snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
+ "Can't set filter: %s", strerror(errno));
+ goto close_fail;
+ }
+
+
+ /* Bind socket to the HCI device */
+ addr.hci_family = AF_BLUETOOTH;
+ addr.hci_dev = handlep->dev_id;
+#ifdef SOCKADDR_HCI_HAS_HCI_CHANNEL
+ addr.hci_channel = HCI_CHANNEL_RAW;
+#endif
+ if (bind(handle->fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+ snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
+ "Can't attach to device %d: %s", handlep->dev_id,
+ strerror(errno));
+ goto close_fail;
+ }
+
+ if (handle->opt.rfmon) {
+ /*
+ * Monitor mode doesn't apply to Bluetooth devices.
+ */
+ err = PCAP_ERROR_RFMON_NOTSUP;
+ goto close_fail;
+ }
+
+ if (handle->opt.buffer_size != 0) {
+ /*
+ * Set the socket buffer size to the specified value.
+ */
+ if (setsockopt(handle->fd, SOL_SOCKET, SO_RCVBUF,
+ &handle->opt.buffer_size,
+ sizeof(handle->opt.buffer_size)) == -1) {
+ snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
+ "SO_RCVBUF: %s", pcap_strerror(errno));
+ goto close_fail;
+ }
+ }
+
+ handle->selectable_fd = handle->fd;
+ return 0;
+
+close_fail:
+ pcap_cleanup_live_common(handle);
+ return err;
+}
+
+static int
+bt_read_linux(pcap_t *handle, int max_packets, pcap_handler callback, u_char *user)
+{
+ struct cmsghdr *cmsg;
+ struct msghdr msg;
+ struct iovec iv;
+ ssize_t ret;
+ struct pcap_pkthdr pkth;
+ pcap_bluetooth_h4_header* bthdr;
+
+ bthdr = (pcap_bluetooth_h4_header*) &handle->buffer[handle->offset];
+ iv.iov_base = &handle->buffer[handle->offset+sizeof(pcap_bluetooth_h4_header)];
+ iv.iov_len = handle->snapshot;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.msg_iov = &iv;
+ msg.msg_iovlen = 1;
+ msg.msg_control = handle->buffer;
+ msg.msg_controllen = handle->offset;
+
+ /* ignore interrupt system call error */
+ do {
+ ret = recvmsg(handle->fd, &msg, 0);
+ if (handle->break_loop)
+ {
+ handle->break_loop = 0;
+ return -2;
+ }
+ } while ((ret == -1) && (errno == EINTR));
+
+ if (ret < 0) {
+ snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
+ "Can't receive packet: %s", strerror(errno));
+ return -1;
+ }
+
+ pkth.caplen = ret;
+
+ /* get direction and timestamp*/
+ cmsg = CMSG_FIRSTHDR(&msg);
+ int in=0;
+ while (cmsg) {
+ switch (cmsg->cmsg_type) {
+ case HCI_CMSG_DIR:
+ memcpy(&in, CMSG_DATA(cmsg), sizeof in);
+ break;
+ case HCI_CMSG_TSTAMP:
+ memcpy(&pkth.ts, CMSG_DATA(cmsg),
+ sizeof pkth.ts);
+ break;
+ }
+ cmsg = CMSG_NXTHDR(&msg, cmsg);
+ }
+ if ((in && (handle->direction == PCAP_D_OUT)) ||
+ ((!in) && (handle->direction == PCAP_D_IN)))
+ return 0;
+
+ bthdr->direction = htonl(in != 0);
+ pkth.caplen+=sizeof(pcap_bluetooth_h4_header);
+ pkth.len = pkth.caplen;
+ if (handle->fcode.bf_insns == NULL ||
+ bpf_filter(handle->fcode.bf_insns, &handle->buffer[handle->offset],
+ pkth.len, pkth.caplen)) {
+ callback(user, &pkth, &handle->buffer[handle->offset]);
+ return 1;
+ }
+ return 0; /* didn't pass filter */
+}
+
+static int
+bt_inject_linux(pcap_t *handle, const void *buf, size_t size)
+{
+ snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "inject not supported on "
+ "bluetooth devices");
+ return (-1);
+}
+
+
+static int
+bt_stats_linux(pcap_t *handle, struct pcap_stat *stats)
+{
+ struct pcap_bt *handlep = handle->priv;
+ int ret;
+ struct hci_dev_info dev_info;
+ struct hci_dev_stats * s = &dev_info.stat;
+ dev_info.dev_id = handlep->dev_id;
+
+ /* ignore eintr */
+ do {
+ ret = ioctl(handle->fd, HCIGETDEVINFO, (void *)&dev_info);
+ } while ((ret == -1) && (errno == EINTR));
+
+ if (ret < 0) {
+ snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
+ "Can't get stats via ioctl: %s", strerror(errno));
+ return (-1);
+
+ }
+
+ /* we receive both rx and tx frames, so comulate all stats */
+ stats->ps_recv = s->evt_rx + s->acl_rx + s->sco_rx + s->cmd_tx +
+ s->acl_tx +s->sco_tx;
+ stats->ps_drop = s->err_rx + s->err_tx;
+ stats->ps_ifdrop = 0;
+ return 0;
+}
+
+static int
+bt_setdirection_linux(pcap_t *p, pcap_direction_t d)
+{
+ p->direction = d;
+ return 0;
+}