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-rw-r--r--pcap-can-linux.c319
1 files changed, 0 insertions, 319 deletions
diff --git a/pcap-can-linux.c b/pcap-can-linux.c
deleted file mode 100644
index 3a9e8cb..0000000
--- a/pcap-can-linux.c
+++ /dev/null
@@ -1,319 +0,0 @@
-/*
- * Copyright (c) 2009 Felix Obenhuber
- * 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.
- *
- * SocketCan sniffing API implementation for Linux platform
- * By Felix Obenhuber <felix@obenhuber.de>
- *
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "pcap-int.h"
-#include "pcap-can-linux.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 <net/if.h>
-#include <arpa/inet.h>
-
-#include <linux/can.h>
-#include <linux/can/raw.h>
-
-/* not yet defined anywhere */
-#ifndef PF_CAN
-#define PF_CAN 29
-#endif
-#ifndef AF_CAN
-#define AF_CAN PF_CAN
-#endif
-
-/* forward declaration */
-static int can_activate(pcap_t *);
-static int can_read_linux(pcap_t *, int , pcap_handler , u_char *);
-static int can_inject_linux(pcap_t *, const void *, size_t);
-static int can_setfilter_linux(pcap_t *, struct bpf_program *);
-static int can_setdirection_linux(pcap_t *, pcap_direction_t);
-static int can_stats_linux(pcap_t *, struct pcap_stat *);
-
-/*
- * Private data for capturing on Linux CANbus devices.
- */
-struct pcap_can {
- int ifindex; /* interface index of device we're bound to */
-};
-
-int
-can_findalldevs(pcap_if_t **devlistp, char *errbuf)
-{
- /*
- * There are no platform-specific devices since each device
- * exists as a regular network interface.
- *
- * XXX - true?
- */
- return 0;
-}
-
-pcap_t *
-can_create(const char *device, char *ebuf, int *is_ours)
-{
- const char *cp;
- char *cpend;
- long devnum;
- pcap_t* p;
-
- /* Does this look like a CANbus device? */
- cp = strrchr(device, '/');
- if (cp == NULL)
- cp = device;
- /* Does it begin with "can" or "vcan"? */
- if (strncmp(cp, "can", 3) == 0) {
- /* Begins with "can" */
- cp += 3; /* skip past "can" */
- } else if (strncmp(cp, "vcan", 4) == 0) {
- /* Begins with "vcan" */
- cp += 4;
- } else {
- /* Nope, doesn't begin with "can" or "vcan" */
- *is_ours = 0;
- return NULL;
- }
- /* Yes - is "can" or "vcan" followed by a number from 0? */
- devnum = strtol(cp, &cpend, 10);
- if (cpend == cp || *cpend != '\0') {
- /* Not followed by a number. */
- *is_ours = 0;
- return NULL;
- }
- if (devnum < 0) {
- /* Followed by a non-valid number. */
- *is_ours = 0;
- return NULL;
- }
-
- /* OK, it's probably ours. */
- *is_ours = 1;
-
- p = pcap_create_common(device, ebuf, sizeof (struct pcap_can));
- if (p == NULL)
- return (NULL);
-
- p->activate_op = can_activate;
- return (p);
-}
-
-
-static int
-can_activate(pcap_t* handle)
-{
- struct pcap_can *handlep = handle->priv;
- struct sockaddr_can addr;
- struct ifreq ifr;
-
- /* Initialize some components of the pcap structure. */
- handle->bufsize = 24;
- handle->offset = 8;
- handle->linktype = DLT_CAN_SOCKETCAN;
- handle->read_op = can_read_linux;
- handle->inject_op = can_inject_linux;
- handle->setfilter_op = can_setfilter_linux;
- handle->setdirection_op = can_setdirection_linux;
- handle->set_datalink_op = NULL;
- handle->getnonblock_op = pcap_getnonblock_fd;
- handle->setnonblock_op = pcap_setnonblock_fd;
- handle->stats_op = can_stats_linux;
-
- /* Create socket */
- handle->fd = socket(PF_CAN, SOCK_RAW, CAN_RAW);
- if (handle->fd < 0)
- {
- snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Can't create raw socket %d:%s",
- errno, strerror(errno));
- return PCAP_ERROR;
- }
-
- /* get interface index */
- memset(&ifr, 0, sizeof(ifr));
- strncpy(ifr.ifr_name, handle->opt.source, sizeof(ifr.ifr_name));
- if (ioctl(handle->fd, SIOCGIFINDEX, &ifr) < 0)
- {
- snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
- "Unable to get interface index: %s",
- pcap_strerror(errno));
- pcap_cleanup_live_common(handle);
- return PCAP_ERROR;
- }
- handlep->ifindex = ifr.ifr_ifindex;
-
- /* allocate butter */
- handle->buffer = malloc(handle->bufsize);
- if (!handle->buffer)
- {
- snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Can't allocate dump buffer: %s",
- pcap_strerror(errno));
- pcap_cleanup_live_common(handle);
- return PCAP_ERROR;
- }
-
- /* Bind to the socket */
- addr.can_family = AF_CAN;
- addr.can_ifindex = handlep->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",
- handlep->ifindex, errno, strerror(errno));
- pcap_cleanup_live_common(handle);
- return PCAP_ERROR;
- }
-
- if (handle->opt.rfmon)
- {
- /* Monitor mode doesn't apply to CAN devices. */
- pcap_cleanup_live_common(handle);
- return PCAP_ERROR_RFMON_NOTSUP;
- }
-
- handle->selectable_fd = handle->fd;
- return 0;
-
-}
-
-
-static int
-can_read_linux(pcap_t *handle, int max_packets, pcap_handler callback, u_char *user)
-{
- struct msghdr msg;
- struct pcap_pkthdr pkth;
- struct iovec iv;
- struct can_frame* cf;
-
- iv.iov_base = &handle->buffer[handle->offset];
- 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;
-
- 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 == -1)
- {
- snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Can't receive packet %d:%s",
- errno, strerror(errno));
- return -1;
- }
-
- /* adjust capture len according to frame len */
- cf = (struct can_frame*)&handle->buffer[8];
- pkth.caplen -= 8 - cf->can_dlc;
- pkth.len = pkth.caplen;
-
- cf->can_id = htonl( cf->can_id );
-
- if( -1 == gettimeofday(&pkth.ts, NULL) )
- {
- snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Can't get time of day %d:%s",
- errno, strerror(errno));
- return -1;
- }
-
- callback(user, &pkth, &handle->buffer[8]);
-
- return 1;
-}
-
-
-static int
-can_inject_linux(pcap_t *handle, const void *buf, size_t size)
-{
- /* not yet implemented */
- snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "inject not supported on "
- "can devices");
- return (-1);
-}
-
-
-static int
-can_stats_linux(pcap_t *handle, struct pcap_stat *stats)
-{
- /* not yet implemented */
- stats->ps_recv = 0; /* number of packets received */
- stats->ps_drop = 0; /* number of packets dropped */
- stats->ps_ifdrop = 0; /* drops by interface -- only supported on some platforms */
- return 0;
-}
-
-
-static int
-can_setfilter_linux(pcap_t *p, struct bpf_program *fp)
-{
- /* not yet implemented */
- return 0;
-}
-
-
-static int
-can_setdirection_linux(pcap_t *p, pcap_direction_t d)
-{
- /* no support for PCAP_D_OUT */
- if (d == PCAP_D_OUT)
- {
- snprintf(p->errbuf, sizeof(p->errbuf),
- "Setting direction to PCAP_D_OUT is not supported on can");
- return -1;
- }
-
- p->direction = d;
-
- return 0;
-}
-
-
-/* eof */
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