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author | rpaulo <rpaulo@FreeBSD.org> | 2009-03-21 22:58:08 +0000 |
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committer | rpaulo <rpaulo@FreeBSD.org> | 2009-03-21 22:58:08 +0000 |
commit | 3f19af99adb541ff811a6faaaae340e24ad313c5 (patch) | |
tree | 41d4ee124e8dc2938aa5559c6f422a7b778c807f /contrib/libpcap/pcap-bt-linux.c | |
parent | b0069d00e9ca6c9d90eb18267d0949527c0249e5 (diff) | |
parent | d8d18f6fbdf4f16ae4382f3d0a2d97953edd9b2c (diff) | |
download | FreeBSD-src-3f19af99adb541ff811a6faaaae340e24ad313c5.zip FreeBSD-src-3f19af99adb541ff811a6faaaae340e24ad313c5.tar.gz |
Merge libpcap 1.0.0.
Diffstat (limited to 'contrib/libpcap/pcap-bt-linux.c')
-rw-r--r-- | contrib/libpcap/pcap-bt-linux.c | 372 |
1 files changed, 372 insertions, 0 deletions
diff --git a/contrib/libpcap/pcap-bt-linux.c b/contrib/libpcap/pcap-bt-linux.c new file mode 100644 index 0000000..2c619ff --- /dev/null +++ b/contrib/libpcap/pcap-bt-linux.c @@ -0,0 +1,372 @@ +/* + * 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 1.9.2.6 2008-07-01 07:06:37 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_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 *); + +int +bt_platform_finddevs(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 (errno == EAFNOSUPPORT) + return 0; + snprintf(err_str, PCAP_ERRBUF_SIZE, "Can't open raw Bluetooth socket %d:%s", + errno, 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 %d:%s", + errno, 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, + 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) +{ + pcap_t *p; + + p = pcap_create_common(device, ebuf); + if (p == NULL) + return (NULL); + + p->activate_op = bt_activate; + return (p); +} + +static int +bt_activate(pcap_t* handle) +{ + 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 = bt_setfilter_linux; + 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->md.ifindex = 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 %d:%s", + errno, 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 %d:%s", + errno, 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 %d:%s", + errno, 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 %d:%s", + errno, strerror(errno)); + goto close_fail; + } + + + /* Bind socket to the HCI device */ + addr.hci_family = AF_BLUETOOTH; + addr.hci_dev = handle->md.ifindex; + if (bind(handle->fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { + snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Can't attach to device %d %d:%s", + handle->md.ifindex, errno, 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; + 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 { + pkth.caplen = recvmsg(handle->fd, &msg, 0); + if (handle->break_loop) + { + handle->break_loop = 0; + return -2; + } + } while ((pkth.caplen == -1) && (errno == EINTR)); + + + if (pkth.caplen < 0) { + snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Can't receive packet %d:%s", + errno, strerror(errno)); + return -1; + } + + /* 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)); + break; + case HCI_CMSG_TSTAMP: + pkth.ts = *((struct timeval *) CMSG_DATA(cmsg)); + 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; + callback(user, &pkth, &handle->buffer[handle->offset]); + return 1; +} + +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) +{ + 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 */ + 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)); + 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_setfilter_linux(pcap_t *p, struct bpf_program *fp) +{ + return 0; +} + + +static int +bt_setdirection_linux(pcap_t *p, pcap_direction_t d) +{ + p->direction = d; + return 0; +} |