1511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall/* 2511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * Copyright (c) 2006 Paolo Abeni (Italy) 3511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * All rights reserved. 4511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * 5511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * Redistribution and use in source and binary forms, with or without 6511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * modification, are permitted provided that the following conditions 7511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * are met: 8511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * 9511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * 1. Redistributions of source code must retain the above copyright 10511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * notice, this list of conditions and the following disclaimer. 11511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * 2. Redistributions in binary form must reproduce the above copyright 12511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * notice, this list of conditions and the following disclaimer in the 13511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * documentation and/or other materials provided with the distribution. 14511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * 3. The name of the author may not be used to endorse or promote 15511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * products derived from this software without specific prior written 16511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * permission. 17511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * 18511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * 30511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * USB sniffing API implementation for Linux platform 31511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * By Paolo Abeni <paolo.abeni@email.it> 32511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * Modifications: Kris Katterjohn <katterjohn@gmail.com> 33511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * 34511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall */ 35511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#ifndef lint 36511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic const char rcsid[] _U_ = 37511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall "@(#) $Header: /tcpdump/master/libpcap/pcap-usb-linux.c,v 1.33 2008-12-23 21:38:50 guy Exp $ (LBL)"; 38511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#endif 39511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 40511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#ifdef HAVE_CONFIG_H 41511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include "config.h" 42511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#endif 43511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 44511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include "pcap-int.h" 45511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include "pcap-usb-linux.h" 46511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include "pcap/usb.h" 47511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 48511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#ifdef NEED_STRERROR_H 49511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include "strerror.h" 50511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#endif 51511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 52511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include <ctype.h> 53511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include <errno.h> 54511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include <stdlib.h> 55511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include <unistd.h> 56511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include <fcntl.h> 57511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include <string.h> 58511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include <dirent.h> 59511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include <byteswap.h> 60511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include <netinet/in.h> 61511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include <sys/ioctl.h> 62511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include <sys/mman.h> 63511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#ifdef HAVE_LINUX_USBDEVICE_FS_H 64511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall/* 65511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * We might need <linux/compiler.h> to define __user for 66511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * <linux/usbdevice_fs.h>. 67511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall */ 68511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#ifdef HAVE_LINUX_COMPILER_H 69511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include <linux/compiler.h> 70511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#endif /* HAVE_LINUX_COMPILER_H */ 71511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#include <linux/usbdevice_fs.h> 72511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#endif /* HAVE_LINUX_USBDEVICE_FS_H */ 73511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 74511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define USB_IFACE "usbmon" 75511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define USB_TEXT_DIR_OLD "/sys/kernel/debug/usbmon" 76511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define USB_TEXT_DIR "/sys/kernel/debug/usb/usbmon" 77511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define SYS_USB_BUS_DIR "/sys/bus/usb/devices" 78511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define PROC_USB_BUS_DIR "/proc/bus/usb" 79511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define USB_LINE_LEN 4096 80511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 81511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#if __BYTE_ORDER == __LITTLE_ENDIAN 82511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define htols(s) s 83511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define htoll(l) l 84511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define htol64(ll) ll 85511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#else 86511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define htols(s) bswap_16(s) 87511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define htoll(l) bswap_32(l) 88511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define htol64(ll) bswap_64(ll) 89511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#endif 90511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 91511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstruct mon_bin_stats { 92511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall u_int32_t queued; 93511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall u_int32_t dropped; 94511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall}; 95511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 96511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstruct mon_bin_get { 97511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pcap_usb_header *hdr; 98511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall void *data; 99511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall size_t data_len; /* Length of data (can be zero) */ 100511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall}; 101511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 102511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstruct mon_bin_mfetch { 103511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int32_t *offvec; /* Vector of events fetched */ 104511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int32_t nfetch; /* Number of events to fetch (out: fetched) */ 105511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int32_t nflush; /* Number of events to flush */ 106511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall}; 107511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 108511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define MON_IOC_MAGIC 0x92 109511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 110511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define MON_IOCQ_URB_LEN _IO(MON_IOC_MAGIC, 1) 111511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define MON_IOCX_URB _IOWR(MON_IOC_MAGIC, 2, struct mon_bin_hdr) 112511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define MON_IOCG_STATS _IOR(MON_IOC_MAGIC, 3, struct mon_bin_stats) 113511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define MON_IOCT_RING_SIZE _IO(MON_IOC_MAGIC, 4) 114511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define MON_IOCQ_RING_SIZE _IO(MON_IOC_MAGIC, 5) 115511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define MON_IOCX_GET _IOW(MON_IOC_MAGIC, 6, struct mon_bin_get) 116511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define MON_IOCX_MFETCH _IOWR(MON_IOC_MAGIC, 7, struct mon_bin_mfetch) 117511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define MON_IOCH_MFLUSH _IO(MON_IOC_MAGIC, 8) 118511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 119511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define MON_BIN_SETUP 0x1 /* setup hdr is present*/ 120511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define MON_BIN_SETUP_ZERO 0x2 /* setup buffer is not available */ 121511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define MON_BIN_DATA_ZERO 0x4 /* data buffer is not available */ 122511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define MON_BIN_ERROR 0x8 123511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 124511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall/* 125511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * Private data for capturing on Linux USB. 126511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall */ 127511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstruct pcap_usb_linux { 128511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall u_char *mmapbuf; /* memory-mapped region pointer */ 129511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall size_t mmapbuflen; /* size of region */ 130511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int bus_index; 131511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall u_int packets_read; 132511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall}; 133511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 134511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall/* forward declaration */ 135511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic int usb_activate(pcap_t *); 136511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic int usb_stats_linux(pcap_t *, struct pcap_stat *); 137511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic int usb_stats_linux_bin(pcap_t *, struct pcap_stat *); 138511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic int usb_read_linux(pcap_t *, int , pcap_handler , u_char *); 139511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic int usb_read_linux_bin(pcap_t *, int , pcap_handler , u_char *); 140511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic int usb_read_linux_mmap(pcap_t *, int , pcap_handler , u_char *); 141511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic int usb_inject_linux(pcap_t *, const void *, size_t); 142511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic int usb_setdirection_linux(pcap_t *, pcap_direction_t); 143511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic void usb_cleanup_linux_mmap(pcap_t *); 144511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 145511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall/* facility to add an USB device to the device list*/ 146511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic int 147511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallusb_dev_add(pcap_if_t** alldevsp, int n, char *err_str) 148511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall{ 149511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall char dev_name[10]; 150511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall char dev_descr[30]; 151511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(dev_name, 10, USB_IFACE"%d", n); 152511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(dev_descr, 30, "USB bus number %d", n); 153511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 154511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (pcap_add_if(alldevsp, dev_name, 0, 155511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall dev_descr, err_str) < 0) 156511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return -1; 157511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return 0; 158511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall} 159511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 160511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallint 161511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallusb_findalldevs(pcap_if_t **alldevsp, char *err_str) 162511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall{ 163511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall struct dirent* data; 164511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int ret = 0; 165511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall DIR* dir; 166511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int n; 167511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall char* name; 168511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall size_t len; 169511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 170511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* try scanning sysfs usb bus directory */ 171511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall dir = opendir(SYS_USB_BUS_DIR); 172511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (dir != NULL) { 173511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall while ((ret == 0) && ((data = readdir(dir)) != 0)) { 174511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall name = data->d_name; 175511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 176511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (strncmp(name, "usb", 3) != 0) 177511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall continue; 178511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 179511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (sscanf(&name[3], "%d", &n) == 0) 180511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall continue; 181511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 182511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ret = usb_dev_add(alldevsp, n, err_str); 183511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 184511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 185511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall closedir(dir); 186511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return ret; 187511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 188511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 189511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* that didn't work; try scanning procfs usb bus directory */ 190511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall dir = opendir(PROC_USB_BUS_DIR); 191511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (dir != NULL) { 192511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall while ((ret == 0) && ((data = readdir(dir)) != 0)) { 193511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall name = data->d_name; 194511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall len = strlen(name); 195511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 196511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* if this file name does not end with a number it's not of our interest */ 197511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if ((len < 1) || !isdigit(name[--len])) 198511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall continue; 199511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall while (isdigit(name[--len])); 200511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (sscanf(&name[len+1], "%d", &n) != 1) 201511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall continue; 202511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 203511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ret = usb_dev_add(alldevsp, n, err_str); 204511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 205511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 206511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall closedir(dir); 207511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return ret; 208511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 209511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 210511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* neither of them worked */ 211511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return 0; 212511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall} 213511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 214511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic 215511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallint usb_mmap(pcap_t* handle) 216511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall{ 217511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall struct pcap_usb_linux *handlep = handle->priv; 218511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int len = ioctl(handle->fd, MON_IOCQ_RING_SIZE); 219511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (len < 0) 220511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return 0; 221511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 222511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handlep->mmapbuflen = len; 223511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handlep->mmapbuf = mmap(0, handlep->mmapbuflen, PROT_READ, 224511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall MAP_SHARED, handle->fd, 0); 225511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return handlep->mmapbuf != MAP_FAILED; 226511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall} 227511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 228511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define CTRL_TIMEOUT (5*1000) /* milliseconds */ 229511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 230511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define USB_DIR_IN 0x80 231511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define USB_TYPE_STANDARD 0x00 232511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define USB_RECIP_DEVICE 0x00 233511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 234511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define USB_REQ_GET_DESCRIPTOR 6 235511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 236511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define USB_DT_DEVICE 1 237511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 238511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall/* probe the descriptors of the devices attached to the bus */ 239511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall/* the descriptors will end up in the captured packet stream */ 240511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall/* and be decoded by external apps like wireshark */ 241511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall/* without these identifying probes packet data can't be fully decoded */ 242511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic void 243511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallprobe_devices(int bus) 244511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall{ 245511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall struct usbdevfs_ctrltransfer ctrl; 246511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall struct dirent* data; 247511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int ret = 0; 248511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall char buf[40]; 249511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall DIR* dir; 250511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 251511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* scan usb bus directories for device nodes */ 252511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(buf, sizeof(buf), "/dev/bus/usb/%03d", bus); 253511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall dir = opendir(buf); 254511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (!dir) 255511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return; 256511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 257511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall while ((ret >= 0) && ((data = readdir(dir)) != 0)) { 258511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int fd; 259511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall char* name = data->d_name; 260511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 261511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (name[0] == '.') 262511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall continue; 263511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 264511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(buf, sizeof(buf), "/dev/bus/usb/%03d/%s", bus, data->d_name); 265511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 266511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall fd = open(buf, O_RDWR); 267511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (fd == -1) 268511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall continue; 269511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 270511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* 271511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * Sigh. Different kernels have different member names 272511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * for this structure. 273511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall */ 274511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#ifdef HAVE_USBDEVFS_CTRLTRANSFER_BREQUESTTYPE 275511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ctrl.bRequestType = USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE; 276511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ctrl.bRequest = USB_REQ_GET_DESCRIPTOR; 277511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ctrl.wValue = USB_DT_DEVICE << 8; 278511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ctrl.wIndex = 0; 279511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ctrl.wLength = sizeof(buf); 280511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#else 281511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ctrl.requesttype = USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE; 282511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ctrl.request = USB_REQ_GET_DESCRIPTOR; 283511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ctrl.value = USB_DT_DEVICE << 8; 284511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ctrl.index = 0; 285511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ctrl.length = sizeof(buf); 286511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#endif 287511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ctrl.data = buf; 288511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ctrl.timeout = CTRL_TIMEOUT; 289511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 290511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ret = ioctl(fd, USBDEVFS_CONTROL, &ctrl); 291511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 292511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall close(fd); 293511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 294511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall closedir(dir); 295511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall} 296511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 297511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallpcap_t * 298511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallusb_create(const char *device, char *ebuf, int *is_ours) 299511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall{ 300511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall const char *cp; 301511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall char *cpend; 302511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall long devnum; 303511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pcap_t *p; 304511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 305511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* Does this look like a USB monitoring device? */ 306511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall cp = strrchr(device, '/'); 307511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (cp == NULL) 308511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall cp = device; 309511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* Does it begin with USB_IFACE? */ 310511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (strncmp(cp, USB_IFACE, sizeof USB_IFACE - 1) != 0) { 311511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* Nope, doesn't begin with USB_IFACE */ 312511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall *is_ours = 0; 313511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return NULL; 314511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 315511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* Yes - is USB_IFACE followed by a number? */ 316511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall cp += sizeof USB_IFACE - 1; 317511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall devnum = strtol(cp, &cpend, 10); 318511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (cpend == cp || *cpend != '\0') { 319511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* Not followed by a number. */ 320511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall *is_ours = 0; 321511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return NULL; 322511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 323511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (devnum < 0) { 324511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* Followed by a non-valid number. */ 325511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall *is_ours = 0; 326511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return NULL; 327511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 328511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 329511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* OK, it's probably ours. */ 330511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall *is_ours = 1; 331511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 332511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall p = pcap_create_common(device, ebuf, sizeof (struct pcap_usb_linux)); 333511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (p == NULL) 334511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return (NULL); 335511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 336511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall p->activate_op = usb_activate; 337511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return (p); 338511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall} 339511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 340511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic int 341511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallusb_activate(pcap_t* handle) 342511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall{ 343511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall struct pcap_usb_linux *handlep = handle->priv; 344511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall char full_path[USB_LINE_LEN]; 345511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 346511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* Initialize some components of the pcap structure. */ 347511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->bufsize = handle->snapshot; 348511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->offset = 0; 349511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->linktype = DLT_USB_LINUX; 350511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 351511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->inject_op = usb_inject_linux; 352511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->setfilter_op = install_bpf_program; /* no kernel filtering */ 353511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->setdirection_op = usb_setdirection_linux; 354511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->set_datalink_op = NULL; /* can't change data link type */ 355511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->getnonblock_op = pcap_getnonblock_fd; 356511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->setnonblock_op = pcap_setnonblock_fd; 357511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 358511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /*get usb bus index from device name */ 359511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (sscanf(handle->opt.source, USB_IFACE"%d", &handlep->bus_index) != 1) 360511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 361511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, 362511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall "Can't get USB bus index from %s", handle->opt.source); 363511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return PCAP_ERROR; 364511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 365511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 366511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /*now select the read method: try to open binary interface */ 367511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(full_path, USB_LINE_LEN, LINUX_USB_MON_DEV"%d", handlep->bus_index); 368511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->fd = open(full_path, O_RDONLY, 0); 369511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (handle->fd >= 0) 370511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 371511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (handle->opt.rfmon) { 372511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* 373511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * Monitor mode doesn't apply to USB devices. 374511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall */ 375511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall close(handle->fd); 376511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return PCAP_ERROR_RFMON_NOTSUP; 377511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 378511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 379511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* binary api is available, try to use fast mmap access */ 380511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (usb_mmap(handle)) { 381511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->linktype = DLT_USB_LINUX_MMAPPED; 382511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->stats_op = usb_stats_linux_bin; 383511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->read_op = usb_read_linux_mmap; 384511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->cleanup_op = usb_cleanup_linux_mmap; 385511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall probe_devices(handlep->bus_index); 386511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 387511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* 388511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * "handle->fd" is a real file, so "select()" and 389511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * "poll()" work on it. 390511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall */ 391511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->selectable_fd = handle->fd; 392511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return 0; 393511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 394511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 395511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* can't mmap, use plain binary interface access */ 396511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->stats_op = usb_stats_linux_bin; 397511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->read_op = usb_read_linux_bin; 398511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall probe_devices(handlep->bus_index); 399511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 400511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall else { 401511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /*Binary interface not available, try open text interface */ 402511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(full_path, USB_LINE_LEN, USB_TEXT_DIR"/%dt", handlep->bus_index); 403511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->fd = open(full_path, O_RDONLY, 0); 404511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (handle->fd < 0) 405511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 406511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (errno == ENOENT) 407511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 408511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* 409511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * Not found at the new location; try 410511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * the old location. 411511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall */ 412511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(full_path, USB_LINE_LEN, USB_TEXT_DIR_OLD"/%dt", handlep->bus_index); 413511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->fd = open(full_path, O_RDONLY, 0); 414511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 415511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (handle->fd < 0) { 416511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* no more fallback, give it up*/ 417511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, 418511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall "Can't open USB bus file %s: %s", full_path, strerror(errno)); 419511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return PCAP_ERROR; 420511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 421511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 422511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 423511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (handle->opt.rfmon) { 424511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* 425511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * Monitor mode doesn't apply to USB devices. 426511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall */ 427511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall close(handle->fd); 428511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return PCAP_ERROR_RFMON_NOTSUP; 429511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 430511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 431511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->stats_op = usb_stats_linux; 432511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->read_op = usb_read_linux; 433511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 434511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 435511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* 436511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * "handle->fd" is a real file, so "select()" and "poll()" 437511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * work on it. 438511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall */ 439511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->selectable_fd = handle->fd; 440511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 441511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* for plain binary access and text access we need to allocate the read 442511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * buffer */ 443511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->buffer = malloc(handle->bufsize); 444511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (!handle->buffer) { 445511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, 446511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall "malloc: %s", pcap_strerror(errno)); 447511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall close(handle->fd); 448511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return PCAP_ERROR; 449511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 450511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return 0; 451511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall} 452511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 453511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic inline int 454511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallascii_to_int(char c) 455511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall{ 456511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return c < 'A' ? c- '0': ((c<'a') ? c - 'A' + 10: c-'a'+10); 457511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall} 458511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 459511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall/* 460511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * see <linux-kernel-source>/Documentation/usb/usbmon.txt and 461511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * <linux-kernel-source>/drivers/usb/mon/mon_text.c for urb string 462511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * format description 463511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall */ 464511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic int 465511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallusb_read_linux(pcap_t *handle, int max_packets, pcap_handler callback, u_char *user) 466511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall{ 467511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* see: 468511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * /usr/src/linux/Documentation/usb/usbmon.txt 469511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * for message format 470511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall */ 471511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall struct pcap_usb_linux *handlep = handle->priv; 472511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall unsigned timestamp; 473511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int tag, cnt, ep_num, dev_addr, dummy, ret, urb_len, data_len; 474511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall char etype, pipeid1, pipeid2, status[16], urb_tag, line[USB_LINE_LEN]; 475511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall char *string = line; 476511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall u_char * rawdata = handle->buffer; 477511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall struct pcap_pkthdr pkth; 478511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pcap_usb_header* uhdr = (pcap_usb_header*)handle->buffer; 479511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall u_char urb_transfer=0; 480511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int incoming=0; 481511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 482511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* ignore interrupt system call errors */ 483511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall do { 484511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ret = read(handle->fd, line, USB_LINE_LEN - 1); 485511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (handle->break_loop) 486511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 487511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->break_loop = 0; 488511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return -2; 489511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 490511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } while ((ret == -1) && (errno == EINTR)); 491511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (ret < 0) 492511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 493511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (errno == EAGAIN) 494511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return 0; /* no data there */ 495511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 496511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, 497511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall "Can't read from fd %d: %s", handle->fd, strerror(errno)); 498511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return -1; 499511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 500511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 501511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* read urb header; %n argument may increment return value, but it's 502511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * not mandatory, so does not count on it*/ 503511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall string[ret] = 0; 504511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ret = sscanf(string, "%x %d %c %c%c:%d:%d %s%n", &tag, ×tamp, &etype, 505511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall &pipeid1, &pipeid2, &dev_addr, &ep_num, status, 506511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall &cnt); 507511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (ret < 8) 508511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 509511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, 510511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall "Can't parse USB bus message '%s', too few tokens (expected 8 got %d)", 511511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall string, ret); 512511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return -1; 513511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 514511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall uhdr->id = tag; 515511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall uhdr->device_address = dev_addr; 516511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall uhdr->bus_id = handlep->bus_index; 517511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall uhdr->status = 0; 518511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall string += cnt; 519511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 520511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* don't use usbmon provided timestamp, since it have low precision*/ 521511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (gettimeofday(&pkth.ts, NULL) < 0) 522511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 523511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, 524511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall "Can't get timestamp for message '%s' %d:%s", 525511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall string, errno, strerror(errno)); 526511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return -1; 527511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 528511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall uhdr->ts_sec = pkth.ts.tv_sec; 529511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall uhdr->ts_usec = pkth.ts.tv_usec; 530511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 531511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* parse endpoint information */ 532511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (pipeid1 == 'C') 533511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall urb_transfer = URB_CONTROL; 534511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall else if (pipeid1 == 'Z') 535511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall urb_transfer = URB_ISOCHRONOUS; 536511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall else if (pipeid1 == 'I') 537511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall urb_transfer = URB_INTERRUPT; 538511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall else if (pipeid1 == 'B') 539511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall urb_transfer = URB_BULK; 540511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (pipeid2 == 'i') { 541511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ep_num |= URB_TRANSFER_IN; 542511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall incoming = 1; 543511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 544511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (etype == 'C') 545511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall incoming = !incoming; 546511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 547511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* direction check*/ 548511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (incoming) 549511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 550511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (handle->direction == PCAP_D_OUT) 551511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return 0; 552511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 553511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall else 554511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (handle->direction == PCAP_D_IN) 555511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return 0; 556511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall uhdr->event_type = etype; 557511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall uhdr->transfer_type = urb_transfer; 558511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall uhdr->endpoint_number = ep_num; 559511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pkth.caplen = sizeof(pcap_usb_header); 560511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall rawdata += sizeof(pcap_usb_header); 561511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 562511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* check if this is a setup packet */ 563511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ret = sscanf(status, "%d", &dummy); 564511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (ret != 1) 565511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 566511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* this a setup packet, setup data can be filled with underscore if 567511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * usbmon has not been able to read them, so we must parse this fields as 568511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * strings */ 569511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pcap_usb_setup* shdr; 570511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall char str1[3], str2[3], str3[5], str4[5], str5[5]; 571511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ret = sscanf(string, "%s %s %s %s %s%n", str1, str2, str3, str4, 572511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall str5, &cnt); 573511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (ret < 5) 574511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 575511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, 576511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall "Can't parse USB bus message '%s', too few tokens (expected 5 got %d)", 577511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall string, ret); 578511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return -1; 579511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 580511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall string += cnt; 581511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 582511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* try to convert to corresponding integer */ 583511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall shdr = &uhdr->setup; 584511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall shdr->bmRequestType = strtoul(str1, 0, 16); 585511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall shdr->bRequest = strtoul(str2, 0, 16); 586511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall shdr->wValue = htols(strtoul(str3, 0, 16)); 587511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall shdr->wIndex = htols(strtoul(str4, 0, 16)); 588511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall shdr->wLength = htols(strtoul(str5, 0, 16)); 589511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 590511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall uhdr->setup_flag = 0; 591511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 592511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall else 593511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall uhdr->setup_flag = 1; 594511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 595511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* read urb data */ 596511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ret = sscanf(string, " %d%n", &urb_len, &cnt); 597511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (ret < 1) 598511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 599511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, 600511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall "Can't parse urb length from '%s'", string); 601511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return -1; 602511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 603511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall string += cnt; 604511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 605511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* urb tag is not present if urb length is 0, so we can stop here 606511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * text parsing */ 607511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pkth.len = urb_len+pkth.caplen; 608511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall uhdr->urb_len = urb_len; 609511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall uhdr->data_flag = 1; 610511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall data_len = 0; 611511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (uhdr->urb_len == 0) 612511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall goto got; 613511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 614511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* check for data presence; data is present if and only if urb tag is '=' */ 615511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (sscanf(string, " %c", &urb_tag) != 1) 616511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 617511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, 618511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall "Can't parse urb tag from '%s'", string); 619511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return -1; 620511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 621511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 622511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (urb_tag != '=') 623511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall goto got; 624511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 625511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* skip urb tag and following space */ 626511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall string += 3; 627511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 628511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* if we reach this point we got some urb data*/ 629511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall uhdr->data_flag = 0; 630511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 631511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* read all urb data; if urb length is greater then the usbmon internal 632511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * buffer length used by the kernel to spool the URB, we get only 633511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * a partial information. 634511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * At least until linux 2.6.17 there is no way to set usbmon intenal buffer 635511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * length and default value is 130. */ 636511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall while ((string[0] != 0) && (string[1] != 0) && (pkth.caplen < handle->snapshot)) 637511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 638511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall rawdata[0] = ascii_to_int(string[0]) * 16 + ascii_to_int(string[1]); 639511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall rawdata++; 640511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall string+=2; 641511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (string[0] == ' ') 642511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall string++; 643511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pkth.caplen++; 644511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall data_len++; 645511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 646511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 647511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallgot: 648511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall uhdr->data_len = data_len; 649511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (pkth.caplen > handle->snapshot) 650511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pkth.caplen = handle->snapshot; 651511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 652511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (handle->fcode.bf_insns == NULL || 653511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall bpf_filter(handle->fcode.bf_insns, handle->buffer, 654511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pkth.len, pkth.caplen)) { 655511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handlep->packets_read++; 656511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall callback(user, &pkth, handle->buffer); 657511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return 1; 658511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 659511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return 0; /* didn't pass filter */ 660511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall} 661511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 662511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic int 663511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallusb_inject_linux(pcap_t *handle, const void *buf, size_t size) 664511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall{ 665511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "inject not supported on " 666511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall "USB devices"); 667511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return (-1); 668511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall} 669511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 670511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic int 671511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallusb_stats_linux(pcap_t *handle, struct pcap_stat *stats) 672511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall{ 673511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall struct pcap_usb_linux *handlep = handle->priv; 674511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int dummy, ret, consumed, cnt; 675511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall char string[USB_LINE_LEN]; 676511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall char token[USB_LINE_LEN]; 677511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall char * ptr = string; 678511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int fd; 679511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 680511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(string, USB_LINE_LEN, USB_TEXT_DIR"/%ds", handlep->bus_index); 681511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall fd = open(string, O_RDONLY, 0); 682511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (fd < 0) 683511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 684511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (errno == ENOENT) 685511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 686511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* 687511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * Not found at the new location; try the old 688511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * location. 689511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall */ 690511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(string, USB_LINE_LEN, USB_TEXT_DIR_OLD"/%ds", handlep->bus_index); 691511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall fd = open(string, O_RDONLY, 0); 692511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 693511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (fd < 0) { 694511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, 695511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall "Can't open USB stats file %s: %s", 696511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall string, strerror(errno)); 697511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return -1; 698511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 699511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 700511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 701511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* read stats line */ 702511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall do { 703511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ret = read(fd, string, USB_LINE_LEN-1); 704511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } while ((ret == -1) && (errno == EINTR)); 705511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall close(fd); 706511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 707511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (ret < 0) 708511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 709511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, 710511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall "Can't read stats from fd %d ", fd); 711511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return -1; 712511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 713511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall string[ret] = 0; 714511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 715511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* extract info on dropped urbs */ 716511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall for (consumed=0; consumed < ret; ) { 717511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* from the sscanf man page: 718511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * The C standard says: "Execution of a %n directive does 719511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * not increment the assignment count returned at the completion 720511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * of execution" but the Corrigendum seems to contradict this. 721511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * Do not make any assumptions on the effect of %n conversions 722511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * on the return value and explicitly check for cnt assignmet*/ 723511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int ntok; 724511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 725511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall cnt = -1; 726511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ntok = sscanf(ptr, "%s%n", token, &cnt); 727511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if ((ntok < 1) || (cnt < 0)) 728511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall break; 729511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall consumed += cnt; 730511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ptr += cnt; 731511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (strcmp(token, "nreaders") == 0) 732511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ret = sscanf(ptr, "%d", &stats->ps_drop); 733511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall else 734511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ret = sscanf(ptr, "%d", &dummy); 735511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (ntok != 1) 736511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall break; 737511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall consumed += cnt; 738511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ptr += cnt; 739511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 740511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 741511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall stats->ps_recv = handlep->packets_read; 742511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall stats->ps_ifdrop = 0; 743511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return 0; 744511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall} 745511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 746511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic int 747511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallusb_setdirection_linux(pcap_t *p, pcap_direction_t d) 748511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall{ 749511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall p->direction = d; 750511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return 0; 751511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall} 752511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 753511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 754511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic int 755511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallusb_stats_linux_bin(pcap_t *handle, struct pcap_stat *stats) 756511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall{ 757511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall struct pcap_usb_linux *handlep = handle->priv; 758511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int ret; 759511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall struct mon_bin_stats st; 760511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ret = ioctl(handle->fd, MON_IOCG_STATS, &st); 761511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (ret < 0) 762511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 763511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, 764511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall "Can't read stats from fd %d:%s ", handle->fd, strerror(errno)); 765511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return -1; 766511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 767511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 768511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall stats->ps_recv = handlep->packets_read + st.queued; 769511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall stats->ps_drop = st.dropped; 770511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall stats->ps_ifdrop = 0; 771511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return 0; 772511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall} 773511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 774511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall/* 775511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * see <linux-kernel-source>/Documentation/usb/usbmon.txt and 776511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * <linux-kernel-source>/drivers/usb/mon/mon_bin.c binary ABI 777511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall */ 778511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic int 779511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallusb_read_linux_bin(pcap_t *handle, int max_packets, pcap_handler callback, u_char *user) 780511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall{ 781511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall struct pcap_usb_linux *handlep = handle->priv; 782511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall struct mon_bin_get info; 783511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int ret; 784511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall struct pcap_pkthdr pkth; 785511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int clen = handle->snapshot - sizeof(pcap_usb_header); 786511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 787511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* the usb header is going to be part of 'packet' data*/ 788511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall info.hdr = (pcap_usb_header*) handle->buffer; 789511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall info.data = handle->buffer + sizeof(pcap_usb_header); 790511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall info.data_len = clen; 791511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 792511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* ignore interrupt system call errors */ 793511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall do { 794511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ret = ioctl(handle->fd, MON_IOCX_GET, &info); 795511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (handle->break_loop) 796511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 797511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->break_loop = 0; 798511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return -2; 799511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 800511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } while ((ret == -1) && (errno == EINTR)); 801511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (ret < 0) 802511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 803511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (errno == EAGAIN) 804511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return 0; /* no data there */ 805511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 806511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, 807511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall "Can't read from fd %d: %s", handle->fd, strerror(errno)); 808511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return -1; 809511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 810511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 811511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* we can get less that than really captured from kernel, depending on 812511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * snaplen, so adjust header accordingly */ 813511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (info.hdr->data_len < clen) 814511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall clen = info.hdr->data_len; 815511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall info.hdr->data_len = clen; 816511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pkth.caplen = clen + sizeof(pcap_usb_header); 817511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pkth.len = info.hdr->data_len + sizeof(pcap_usb_header); 818511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pkth.ts.tv_sec = info.hdr->ts_sec; 819511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pkth.ts.tv_usec = info.hdr->ts_usec; 820511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 821511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (handle->fcode.bf_insns == NULL || 822511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall bpf_filter(handle->fcode.bf_insns, handle->buffer, 823511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pkth.len, pkth.caplen)) { 824511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handlep->packets_read++; 825511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall callback(user, &pkth, handle->buffer); 826511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return 1; 827511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 828511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 829511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return 0; /* didn't pass filter */ 830511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall} 831511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 832511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall/* 833511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * see <linux-kernel-source>/Documentation/usb/usbmon.txt and 834511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * <linux-kernel-source>/drivers/usb/mon/mon_bin.c binary ABI 835511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall */ 836511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall#define VEC_SIZE 32 837511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic int 838511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallusb_read_linux_mmap(pcap_t *handle, int max_packets, pcap_handler callback, u_char *user) 839511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall{ 840511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall struct pcap_usb_linux *handlep = handle->priv; 841511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall struct mon_bin_mfetch fetch; 842511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int32_t vec[VEC_SIZE]; 843511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall struct pcap_pkthdr pkth; 844511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pcap_usb_header* hdr; 845511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int nflush = 0; 846511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int packets = 0; 847511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int clen, max_clen; 848511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 849511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall max_clen = handle->snapshot - sizeof(pcap_usb_header); 850511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 851511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall for (;;) { 852511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int i, ret; 853511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall int limit = max_packets - packets; 854511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (limit <= 0) 855511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall limit = VEC_SIZE; 856511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (limit > VEC_SIZE) 857511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall limit = VEC_SIZE; 858511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 859511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* try to fetch as many events as possible*/ 860511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall fetch.offvec = vec; 861511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall fetch.nfetch = limit; 862511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall fetch.nflush = nflush; 863511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* ignore interrupt system call errors */ 864511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall do { 865511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ret = ioctl(handle->fd, MON_IOCX_MFETCH, &fetch); 866511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (handle->break_loop) 867511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 868511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handle->break_loop = 0; 869511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return -2; 870511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 871511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } while ((ret == -1) && (errno == EINTR)); 872511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (ret < 0) 873511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall { 874511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (errno == EAGAIN) 875511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return 0; /* no data there */ 876511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 877511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, 878511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall "Can't mfetch fd %d: %s", handle->fd, strerror(errno)); 879511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return -1; 880511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 881511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 882511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* keep track of processed events, we will flush them later */ 883511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall nflush = fetch.nfetch; 884511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall for (i=0; i<fetch.nfetch; ++i) { 885511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* discard filler */ 886511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall hdr = (pcap_usb_header*) &handlep->mmapbuf[vec[i]]; 887511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (hdr->event_type == '@') 888511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall continue; 889511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 890511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* we can get less that than really captured from kernel, depending on 891511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall * snaplen, so adjust header accordingly */ 892511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall clen = max_clen; 893511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (hdr->data_len < clen) 894511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall clen = hdr->data_len; 895511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 896511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* get packet info from header*/ 897511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pkth.caplen = clen + sizeof(pcap_usb_header_mmapped); 898511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pkth.len = hdr->data_len + sizeof(pcap_usb_header_mmapped); 899511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pkth.ts.tv_sec = hdr->ts_sec; 900511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pkth.ts.tv_usec = hdr->ts_usec; 901511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 902511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (handle->fcode.bf_insns == NULL || 903511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall bpf_filter(handle->fcode.bf_insns, (u_char*) hdr, 904511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pkth.len, pkth.caplen)) { 905511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handlep->packets_read++; 906511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall callback(user, &pkth, (u_char*) hdr); 907511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall packets++; 908511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 909511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 910511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 911511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* with max_packets specifying "unlimited" we stop afer the first chunk*/ 912511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (PACKET_COUNT_IS_UNLIMITED(max_packets) || (packets == max_packets)) 913511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall break; 914511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 915511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 916511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* flush pending events*/ 917511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall ioctl(handle->fd, MON_IOCH_MFLUSH, nflush); 918511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall return packets; 919511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall} 920511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 921511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallstatic void 922511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrallusb_cleanup_linux_mmap(pcap_t* handle) 923511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall{ 924511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall struct pcap_usb_linux *handlep = handle->priv; 925511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall 926511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall /* if we have a memory-mapped buffer, unmap it */ 927511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall if (handlep->mmapbuf != NULL) { 928511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall munmap(handlep->mmapbuf, handlep->mmapbuflen); 929511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall handlep->mmapbuf = NULL; 930511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall } 931511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall pcap_cleanup_live_common(handle); 932511eca30a483e912c274e1d8ba3a0f8f081e2227JP Abgrall} 933