- add netmap-libpcap
- add netmap (FreeBSD header files need to be updated with this) - move prototype perl scripts to prototype/ folder - create basic structure for sipcap app (no code yet)
This commit is contained in:
farrokhi
411
netmap-libpcap/pcap-bt-linux.c
Normal file
411
netmap-libpcap/pcap-bt-linux.c
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@ -0,0 +1,411 @@
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/*
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* Copyright (c) 2006 Paolo Abeni (Italy)
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Bluetooth sniffing API implementation for Linux platform
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* By Paolo Abeni <paolo.abeni@email.it>
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "pcap-int.h"
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#include "pcap-bt-linux.h"
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#include "pcap/bluetooth.h"
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#ifdef NEED_STRERROR_H
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#include "strerror.h"
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#endif
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <bluetooth/bluetooth.h>
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#include <bluetooth/hci.h>
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#define BT_IFACE "bluetooth"
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#define BT_CTRL_SIZE 128
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/* forward declaration */
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static int bt_activate(pcap_t *);
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static int bt_read_linux(pcap_t *, int , pcap_handler , u_char *);
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static int bt_inject_linux(pcap_t *, const void *, size_t);
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static int bt_setdirection_linux(pcap_t *, pcap_direction_t);
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static int bt_stats_linux(pcap_t *, struct pcap_stat *);
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/*
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* Private data for capturing on Linux Bluetooth devices.
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*/
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struct pcap_bt {
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int dev_id; /* device ID of device we're bound to */
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};
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int
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bt_findalldevs(pcap_if_t **alldevsp, char *err_str)
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{
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struct hci_dev_list_req *dev_list;
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struct hci_dev_req *dev_req;
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int i, sock;
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int ret = 0;
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sock = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
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if (sock < 0)
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{
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/* if bluetooth is not supported this this is not fatal*/
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if (errno == EAFNOSUPPORT)
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return 0;
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snprintf(err_str, PCAP_ERRBUF_SIZE,
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"Can't open raw Bluetooth socket: %s", strerror(errno));
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return -1;
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}
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dev_list = malloc(HCI_MAX_DEV * sizeof(*dev_req) + sizeof(*dev_list));
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if (!dev_list)
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{
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snprintf(err_str, PCAP_ERRBUF_SIZE, "Can't allocate %zu bytes for Bluetooth device list",
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HCI_MAX_DEV * sizeof(*dev_req) + sizeof(*dev_list));
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ret = -1;
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goto done;
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}
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dev_list->dev_num = HCI_MAX_DEV;
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if (ioctl(sock, HCIGETDEVLIST, (void *) dev_list) < 0)
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{
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snprintf(err_str, PCAP_ERRBUF_SIZE,
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"Can't get Bluetooth device list via ioctl: %s",
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strerror(errno));
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ret = -1;
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goto free;
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}
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dev_req = dev_list->dev_req;
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for (i = 0; i < dev_list->dev_num; i++, dev_req++) {
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char dev_name[20], dev_descr[30];
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snprintf(dev_name, 20, BT_IFACE"%d", dev_req->dev_id);
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snprintf(dev_descr, 30, "Bluetooth adapter number %d", i);
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if (pcap_add_if(alldevsp, dev_name, 0,
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dev_descr, err_str) < 0)
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{
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ret = -1;
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break;
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}
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}
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free:
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free(dev_list);
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done:
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close(sock);
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return ret;
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}
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pcap_t *
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bt_create(const char *device, char *ebuf, int *is_ours)
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{
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const char *cp;
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char *cpend;
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long devnum;
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pcap_t *p;
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/* Does this look like a Bluetooth device? */
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cp = strrchr(device, '/');
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if (cp == NULL)
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cp = device;
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/* Does it begin with BT_IFACE? */
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if (strncmp(cp, BT_IFACE, sizeof BT_IFACE - 1) != 0) {
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/* Nope, doesn't begin with BT_IFACE */
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*is_ours = 0;
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return NULL;
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}
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/* Yes - is BT_IFACE followed by a number? */
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cp += sizeof BT_IFACE - 1;
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devnum = strtol(cp, &cpend, 10);
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if (cpend == cp || *cpend != '\0') {
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/* Not followed by a number. */
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*is_ours = 0;
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return NULL;
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}
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if (devnum < 0) {
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/* Followed by a non-valid number. */
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*is_ours = 0;
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return NULL;
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}
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/* OK, it's probably ours. */
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*is_ours = 1;
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p = pcap_create_common(device, ebuf, sizeof (struct pcap_bt));
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if (p == NULL)
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return (NULL);
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p->activate_op = bt_activate;
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return (p);
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}
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static int
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bt_activate(pcap_t* handle)
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{
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struct pcap_bt *handlep = handle->priv;
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struct sockaddr_hci addr;
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int opt;
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int dev_id;
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struct hci_filter flt;
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int err = PCAP_ERROR;
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/* get bt interface id */
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if (sscanf(handle->opt.source, BT_IFACE"%d", &dev_id) != 1)
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{
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snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
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"Can't get Bluetooth device index from %s",
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handle->opt.source);
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return PCAP_ERROR;
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}
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/* Initialize some components of the pcap structure. */
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handle->bufsize = handle->snapshot+BT_CTRL_SIZE+sizeof(pcap_bluetooth_h4_header);
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handle->offset = BT_CTRL_SIZE;
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handle->linktype = DLT_BLUETOOTH_HCI_H4_WITH_PHDR;
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handle->read_op = bt_read_linux;
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handle->inject_op = bt_inject_linux;
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handle->setfilter_op = install_bpf_program; /* no kernel filtering */
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handle->setdirection_op = bt_setdirection_linux;
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handle->set_datalink_op = NULL; /* can't change data link type */
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handle->getnonblock_op = pcap_getnonblock_fd;
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handle->setnonblock_op = pcap_setnonblock_fd;
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handle->stats_op = bt_stats_linux;
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handlep->dev_id = dev_id;
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/* Create HCI socket */
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handle->fd = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
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if (handle->fd < 0) {
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snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
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"Can't create raw socket: %s", strerror(errno));
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return PCAP_ERROR;
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}
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handle->buffer = malloc(handle->bufsize);
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if (!handle->buffer) {
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snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Can't allocate dump buffer: %s",
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pcap_strerror(errno));
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goto close_fail;
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}
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opt = 1;
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if (setsockopt(handle->fd, SOL_HCI, HCI_DATA_DIR, &opt, sizeof(opt)) < 0) {
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snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
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"Can't enable data direction info: %s", strerror(errno));
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goto close_fail;
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}
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opt = 1;
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if (setsockopt(handle->fd, SOL_HCI, HCI_TIME_STAMP, &opt, sizeof(opt)) < 0) {
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snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
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"Can't enable time stamp: %s", strerror(errno));
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goto close_fail;
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}
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/* Setup filter, do not call hci function to avoid dependence on
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* external libs */
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memset(&flt, 0, sizeof(flt));
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memset((void *) &flt.type_mask, 0xff, sizeof(flt.type_mask));
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memset((void *) &flt.event_mask, 0xff, sizeof(flt.event_mask));
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if (setsockopt(handle->fd, SOL_HCI, HCI_FILTER, &flt, sizeof(flt)) < 0) {
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snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
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"Can't set filter: %s", strerror(errno));
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goto close_fail;
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}
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/* Bind socket to the HCI device */
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addr.hci_family = AF_BLUETOOTH;
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addr.hci_dev = handlep->dev_id;
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#ifdef SOCKADDR_HCI_HAS_HCI_CHANNEL
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addr.hci_channel = HCI_CHANNEL_RAW;
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#endif
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if (bind(handle->fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
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snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
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"Can't attach to device %d: %s", handlep->dev_id,
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strerror(errno));
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goto close_fail;
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}
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if (handle->opt.rfmon) {
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/*
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* Monitor mode doesn't apply to Bluetooth devices.
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*/
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err = PCAP_ERROR_RFMON_NOTSUP;
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goto close_fail;
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}
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if (handle->opt.buffer_size != 0) {
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/*
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* Set the socket buffer size to the specified value.
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*/
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if (setsockopt(handle->fd, SOL_SOCKET, SO_RCVBUF,
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&handle->opt.buffer_size,
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sizeof(handle->opt.buffer_size)) == -1) {
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snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
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"SO_RCVBUF: %s", pcap_strerror(errno));
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goto close_fail;
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}
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}
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handle->selectable_fd = handle->fd;
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return 0;
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close_fail:
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pcap_cleanup_live_common(handle);
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return err;
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}
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static int
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bt_read_linux(pcap_t *handle, int max_packets, pcap_handler callback, u_char *user)
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{
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struct cmsghdr *cmsg;
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struct msghdr msg;
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struct iovec iv;
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ssize_t ret;
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struct pcap_pkthdr pkth;
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pcap_bluetooth_h4_header* bthdr;
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bthdr = (pcap_bluetooth_h4_header*) &handle->buffer[handle->offset];
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iv.iov_base = &handle->buffer[handle->offset+sizeof(pcap_bluetooth_h4_header)];
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iv.iov_len = handle->snapshot;
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memset(&msg, 0, sizeof(msg));
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msg.msg_iov = &iv;
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msg.msg_iovlen = 1;
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msg.msg_control = handle->buffer;
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msg.msg_controllen = handle->offset;
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/* ignore interrupt system call error */
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do {
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ret = recvmsg(handle->fd, &msg, 0);
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if (handle->break_loop)
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{
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handle->break_loop = 0;
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return -2;
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}
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} while ((ret == -1) && (errno == EINTR));
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if (ret < 0) {
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snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
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"Can't receive packet: %s", strerror(errno));
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return -1;
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}
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pkth.caplen = ret;
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/* get direction and timestamp*/
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cmsg = CMSG_FIRSTHDR(&msg);
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int in=0;
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while (cmsg) {
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switch (cmsg->cmsg_type) {
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case HCI_CMSG_DIR:
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memcpy(&in, CMSG_DATA(cmsg), sizeof in);
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break;
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case HCI_CMSG_TSTAMP:
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memcpy(&pkth.ts, CMSG_DATA(cmsg),
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sizeof pkth.ts);
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break;
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}
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cmsg = CMSG_NXTHDR(&msg, cmsg);
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}
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if ((in && (handle->direction == PCAP_D_OUT)) ||
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((!in) && (handle->direction == PCAP_D_IN)))
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return 0;
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bthdr->direction = htonl(in != 0);
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pkth.caplen+=sizeof(pcap_bluetooth_h4_header);
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pkth.len = pkth.caplen;
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if (handle->fcode.bf_insns == NULL ||
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bpf_filter(handle->fcode.bf_insns, &handle->buffer[handle->offset],
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pkth.len, pkth.caplen)) {
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callback(user, &pkth, &handle->buffer[handle->offset]);
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return 1;
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}
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return 0; /* didn't pass filter */
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}
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static int
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bt_inject_linux(pcap_t *handle, const void *buf, size_t size)
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{
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snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "inject not supported on "
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"bluetooth devices");
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return (-1);
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}
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static int
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bt_stats_linux(pcap_t *handle, struct pcap_stat *stats)
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{
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struct pcap_bt *handlep = handle->priv;
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int ret;
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struct hci_dev_info dev_info;
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struct hci_dev_stats * s = &dev_info.stat;
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dev_info.dev_id = handlep->dev_id;
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/* ignore eintr */
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do {
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ret = ioctl(handle->fd, HCIGETDEVINFO, (void *)&dev_info);
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} while ((ret == -1) && (errno == EINTR));
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if (ret < 0) {
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snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
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"Can't get stats via ioctl: %s", strerror(errno));
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return (-1);
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}
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/* we receive both rx and tx frames, so comulate all stats */
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stats->ps_recv = s->evt_rx + s->acl_rx + s->sco_rx + s->cmd_tx +
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s->acl_tx +s->sco_tx;
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stats->ps_drop = s->err_rx + s->err_tx;
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stats->ps_ifdrop = 0;
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return 0;
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}
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static int
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bt_setdirection_linux(pcap_t *p, pcap_direction_t d)
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{
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p->direction = d;
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return 0;
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}
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Reference in New Issue
Block a user