* 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
+ * 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
*
*/
-#ifndef lint
-static const char rcsid[] _U_ =
- "@(#) $Header: /tcpdump/master/libpcap/pcap-bt-linux.c,v 1.10 2008-02-14 23:27:42 guy Exp $ (LBL)";
-#endif
-
+
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#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_setfilter_linux(pcap_t *, struct bpf_program *);
static int bt_setdirection_linux(pcap_t *, pcap_direction_t);
static int bt_stats_linux(pcap_t *, struct pcap_stat *);
-static void bt_close_linux(pcap_t *);
-int
-bt_platform_finddevs(pcap_if_t **alldevsp, char *err_str)
+/*
+ * 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)
{
- pcap_if_t *found_dev = *alldevsp;
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 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 %d:%s",
- errno, strerror(errno));
+ pcap_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)
+ if (!dev_list)
{
- snprintf(err_str, PCAP_ERRBUF_SIZE, "Can't allocate %zu bytes for Bluetooth device list",
+ pcap_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)
+ if (ioctl(sock, HCIGETDEVLIST, (void *) dev_list) < 0)
{
- snprintf(err_str, PCAP_ERRBUF_SIZE, "Can't get Bluetooth device list via ioctl %d:%s",
- errno, strerror(errno));
+ pcap_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(&found_dev, dev_name, 0,
+
+ pcap_snprintf(dev_name, 20, BT_IFACE"%d", dev_req->dev_id);
+ pcap_snprintf(dev_descr, 30, "Bluetooth adapter number %d", i);
+
+ if (pcap_add_if(alldevsp, dev_name, 0,
dev_descr, err_str) < 0)
{
ret = -1;
return ret;
}
-pcap_t*
-bt_open_live(const char* bus, int snaplen, int promisc , int to_ms, char* errmsg)
+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(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;
- pcap_t *handle;
int dev_id;
struct hci_filter flt;
-
+ int err = PCAP_ERROR;
+
/* get bt interface id */
- if (sscanf(bus, BT_IFACE"%d", &dev_id) != 1)
+ if (sscanf(handle->opt.device, BT_IFACE"%d", &dev_id) != 1)
{
- snprintf(errmsg, PCAP_ERRBUF_SIZE,
- "Can't get Bluetooth bus index from %s", bus);
- return NULL;
- }
-
- /* Allocate a handle for this session. */
- handle = malloc(sizeof(*handle));
- if (handle == NULL) {
- snprintf(errmsg, PCAP_ERRBUF_SIZE, "malloc: %s",
- pcap_strerror(errno));
- return NULL;
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
+ "Can't get Bluetooth device index from %s",
+ handle->opt.device);
+ return PCAP_ERROR;
}
-
+
/* Initialize some components of the pcap structure. */
- memset(handle, 0, sizeof(*handle));
- handle->snapshot = snaplen;
- handle->md.timeout = to_ms;
- handle->bufsize = snaplen+BT_CTRL_SIZE+sizeof(pcap_bluetooth_h4_header);
- handle->offset = BT_CTRL_SIZE;
+ handle->bufsize = BT_CTRL_SIZE+sizeof(pcap_bluetooth_h4_header)+handle->snapshot;
handle->linktype = DLT_BLUETOOTH_HCI_H4_WITH_PHDR;
-
+
handle->read_op = bt_read_linux;
handle->inject_op = bt_inject_linux;
- handle->setfilter_op = bt_setfilter_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;
- handle->close_op = bt_close_linux;
- handle->md.ifindex = dev_id;
-
+ handlep->dev_id = dev_id;
+
/* Create HCI socket */
handle->fd = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
if (handle->fd < 0) {
- snprintf(errmsg, PCAP_ERRBUF_SIZE, "Can't create raw socket %d:%s",
- errno, strerror(errno));
- free(handle);
- return NULL;
+ pcap_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(errmsg, PCAP_ERRBUF_SIZE, "Can't allocate dump buffer: %s",
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Can't allocate dump buffer: %s",
pcap_strerror(errno));
- pcap_close(handle);
- return NULL;
+ goto close_fail;
}
opt = 1;
if (setsockopt(handle->fd, SOL_HCI, HCI_DATA_DIR, &opt, sizeof(opt)) < 0) {
- snprintf(errmsg, PCAP_ERRBUF_SIZE, "Can't enable data direction info %d:%s",
- errno, strerror(errno));
- pcap_close(handle);
- return NULL;
+ pcap_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(errmsg, PCAP_ERRBUF_SIZE, "Can't enable time stamp %d:%s",
- errno, strerror(errno));
- pcap_close(handle);
- return NULL;
+ pcap_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
+
+ /* 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.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(errmsg, PCAP_ERRBUF_SIZE, "Can't set filter %d:%s",
- errno, strerror(errno));
- pcap_close(handle);
- return NULL;
+ pcap_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 = handle->md.ifindex;
+ 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(errmsg, PCAP_ERRBUF_SIZE, "Can't attach to device %d %d:%s",
- handle->md.ifindex, errno, strerror(errno));
- pcap_close(handle);
- return NULL;
+ pcap_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) {
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
+ "SO_RCVBUF: %s", pcap_strerror(errno));
+ goto close_fail;
+ }
}
- handle->selectable_fd = handle->fd;
-
- return handle;
+
+ handle->selectable_fd = handle->fd;
+ return 0;
+
+close_fail:
+ pcap_cleanup_live_common(handle);
+ return err;
}
static int
struct cmsghdr *cmsg;
struct msghdr msg;
struct iovec iv;
+ ssize_t ret;
struct pcap_pkthdr pkth;
pcap_bluetooth_h4_header* bthdr;
+ u_char *pktd;
+ int in = 0;
- bthdr = (pcap_bluetooth_h4_header*) &handle->buffer[handle->offset];
- iv.iov_base = &handle->buffer[handle->offset+sizeof(pcap_bluetooth_h4_header)];
+ pktd = (u_char *)handle->buffer + BT_CTRL_SIZE;
+ bthdr = (pcap_bluetooth_h4_header*)(void *)pktd;
+ iv.iov_base = pktd + 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;
+ msg.msg_controllen = BT_CTRL_SIZE;
/* ignore interrupt system call error */
do {
- pkth.caplen = recvmsg(handle->fd, &msg, 0);
+ ret = recvmsg(handle->fd, &msg, 0);
if (handle->break_loop)
{
handle->break_loop = 0;
return -2;
}
- } while ((pkth.caplen == -1) && (errno == EINTR));
+ } while ((ret == -1) && (errno == EINTR));
-
- if (pkth.caplen < 0) {
- snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Can't receive packet %d:%s",
- errno, strerror(errno));
+ if (ret < 0) {
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
+ "Can't receive packet: %s", strerror(errno));
return -1;
}
- /* get direction and timestamp*/
+ pkth.caplen = ret;
+
+ /* get direction and timestamp*/
cmsg = CMSG_FIRSTHDR(&msg);
- int in=0;
while (cmsg) {
switch (cmsg->cmsg_type) {
case HCI_CMSG_DIR:
- in = *((int *) CMSG_DATA(cmsg));
+ memcpy(&in, CMSG_DATA(cmsg), sizeof in);
break;
case HCI_CMSG_TSTAMP:
- pkth.ts = *((struct timeval *) CMSG_DATA(cmsg));
+ memcpy(&pkth.ts, CMSG_DATA(cmsg),
+ sizeof pkth.ts);
break;
}
cmsg = CMSG_NXTHDR(&msg, cmsg);
}
- if ((in && (handle->direction == PCAP_D_OUT)) ||
+ 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;
- callback(user, &pkth, &handle->buffer[handle->offset]);
- return 1;
+ if (handle->fcode.bf_insns == NULL ||
+ bpf_filter(handle->fcode.bf_insns, pktd, pkth.len, pkth.caplen)) {
+ callback(user, &pkth, pktd);
+ 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 "
+ pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "inject not supported on "
"bluetooth devices");
return (-1);
-}
-
-
-static void
-bt_close_linux(pcap_t* handle)
-{
- close(handle->fd);
- free(handle->buffer);
}
-static int
+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 = handle->md.ifindex;
-
- /* ingnore eintr */
+ 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 get stats"
- " via ioctl %d:%s", errno, strerror(errno));
+ pcap_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 +
+ /* 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_setfilter_linux(pcap_t *p, struct bpf_program *fp)
-{
- return 0;
-}
-
-
-static int
+static int
bt_setdirection_linux(pcap_t *p, pcap_direction_t d)
{
p->direction = d;
projects / libpcap / blobdiff