static int
pcap_setuserbuffer_win32(pcap_t *p, int size)
{
unsigned char *new_buff;
if (size<=0) {
/* Bogus parameter */
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"Error: invalid size %d",size);
return (-1);
}
/* Allocate the buffer */
new_buff=(unsigned char*)malloc(sizeof(char)*size);
if (!new_buff) {
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"Error: not enough memory");
return (-1);
}
free(p->buffer);
p->buffer=new_buff;
p->bufsize=size;
return (0);
}
static int
pcap_live_dump_win32(pcap_t *p, char *filename, int maxsize, int maxpacks)
{
struct pcap_win *pw = p->priv;
BOOLEAN res;
/* Set the packet driver in dump mode */
res = PacketSetMode(pw->adapter, PACKET_MODE_DUMP);
if(res == FALSE){
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"Error setting dump mode");
return (-1);
}
/* Set the name of the dump file */
res = PacketSetDumpName(pw->adapter, filename, (int)strlen(filename));
if(res == FALSE){
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"Error setting kernel dump file name");
return (-1);
}
/* Set the limits of the dump file */
res = PacketSetDumpLimits(pw->adapter, maxsize, maxpacks);
if(res == FALSE) {
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"Error setting dump limit");
return (-1);
}
return (0);
}
/*
* \brief Checks that the address, port and flags given are valids and it returns an 'addrinfo' structure.
*
* This function basically calls the getaddrinfo() calls, and it performs a set of sanity checks
* to control that everything is fine (e.g. a TCP socket cannot have a mcast address, and such).
* If an error occurs, it writes the error message into 'errbuf'.
*
* \param host: a pointer to a string identifying the host. It can be
* a host name, a numeric literal address, or NULL or "" (useful
* in case of a server socket which has to bind to all addresses).
*
* \param port: a pointer to a user-allocated buffer containing the network port to use.
*
* \param hints: an addrinfo variable (passed by reference) containing the flags needed to create the
* addrinfo structure appropriately.
*
* \param addrinfo: it represents the true returning value. This is a pointer to an addrinfo variable
* (passed by reference), which will be allocated by this function and returned back to the caller.
* This variable will be used in the next sockets calls.
*
* \param errbuf: a pointer to an user-allocated buffer that will contain the complete
* error message. This buffer has to be at least 'errbuflen' in length.
* It can be NULL; in this case the error cannot be printed.
*
* \param errbuflen: length of the buffer that will contains the error. The error message cannot be
* larger than 'errbuflen - 1' because the last char is reserved for the string terminator.
*
* \return '0' if everything is fine, '-1' if some errors occurred. The error message is returned
* in the 'errbuf' variable. The addrinfo variable that has to be used in the following sockets calls is
* returned into the addrinfo parameter.
*
* \warning The 'addrinfo' variable has to be deleted by the programmer by calling freeaddrinfo() when
* it is no longer needed.
*
* \warning This function requires the 'hints' variable as parameter. The semantic of this variable is the same
* of the one of the corresponding variable used into the standard getaddrinfo() socket function. We suggest
* the programmer to look at that function in order to set the 'hints' variable appropriately.
*/
int sock_initaddress(const char *host, const char *port,
struct addrinfo *hints, struct addrinfo **addrinfo, char *errbuf, int errbuflen)
{
int retval;
retval = getaddrinfo(host, port, hints, addrinfo);
if (retval != 0)
{
/*
* if the getaddrinfo() fails, you have to use gai_strerror(), instead of using the standard
* error routines (errno) in UNIX; Winsock suggests using the GetLastError() instead.
*/
if (errbuf)
{
#ifdef _WIN32
sock_geterror("getaddrinfo(): ", errbuf, errbuflen);
#else
pcap_snprintf(errbuf, errbuflen, "getaddrinfo() %s", gai_strerror(retval));
#endif
}
return -1;
}
/*
* \warning SOCKET: I should check all the accept() in order to bind to all addresses in case
* addrinfo has more han one pointers
*/
/*
* This software only supports PF_INET and PF_INET6.
*
* XXX - should we just check that at least *one* address is
* either PF_INET or PF_INET6, and, when using the list,
* ignore all addresses that are neither? (What, no IPX
* support? :-))
*/
if (((*addrinfo)->ai_family != PF_INET) &&
((*addrinfo)->ai_family != PF_INET6))
{
if (errbuf)
pcap_snprintf(errbuf, errbuflen, "getaddrinfo(): socket type not supported");
freeaddrinfo(*addrinfo);
*addrinfo = NULL;
return -1;
}
/*
* You can't do multicast (or broadcast) TCP.
*/
if (((*addrinfo)->ai_socktype == SOCK_STREAM) &&
(sock_ismcastaddr((*addrinfo)->ai_addr) == 0))
{
if (errbuf)
pcap_snprintf(errbuf, errbuflen, "getaddrinfo(): multicast addresses are not valid when using TCP streams");
freeaddrinfo(*addrinfo);
*addrinfo = NULL;
return -1;
}
return 0;
}
static u_int
pcap_sendqueue_transmit_win32(pcap_t *p, pcap_send_queue *queue, int sync)
{
struct pcap_win *pw = p->priv;
u_int res;
char errbuf[PCAP_ERRBUF_SIZE+1];
if (pw->adapter==NULL) {
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"Cannot transmit a queue to an offline capture or to a TurboCap port");
return (0);
}
res = PacketSendPackets(pw->adapter,
queue->buffer,
queue->len,
(BOOLEAN)sync);
if(res != queue->len){
pcap_win32_err_to_str(GetLastError(), errbuf);
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"Error opening adapter: %s", errbuf);
}
return (res);
}
static int TcSetNonBlock(pcap_t *p, int nonblock, char *errbuf)
{
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"Setting the non blocking status is not available for TurboCap ports");
pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
"Setting the non blocking status is not available for TurboCap ports");
return -1;
}
static int
TcStats(pcap_t *p, struct pcap_stat *ps)
{
struct pcap_tc *pt = p->priv;
TC_STATISTICS statistics;
TC_STATUS status;
ULONGLONG counter;
struct pcap_stat s;
status = g_TcFunctions.InstanceQueryStatistics(pt->TcInstance, &statistics);
if (status != TC_SUCCESS)
{
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "TurboCap error in TcInstanceQueryStatistics: %s (%08x)", g_TcFunctions.StatusGetString(status), status);
return -1;
}
memset(&s, 0, sizeof(s));
status = g_TcFunctions.StatisticsQueryValue(statistics, TC_COUNTER_INSTANCE_TOTAL_RX_PACKETS, &counter);
if (status != TC_SUCCESS)
{
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "TurboCap error in TcStatisticsQueryValue: %s (%08x)", g_TcFunctions.StatusGetString(status), status);
return -1;
}
if (counter <= (ULONGLONG)0xFFFFFFFF)
{
s.ps_recv = (ULONG)counter;
}
else
{
s.ps_recv = 0xFFFFFFFF;
}
status = g_TcFunctions.StatisticsQueryValue(statistics, TC_COUNTER_INSTANCE_RX_DROPPED_PACKETS, &counter);
if (status != TC_SUCCESS)
{
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "TurboCap error in TcStatisticsQueryValue: %s (%08x)", g_TcFunctions.StatusGetString(status), status);
return -1;
}
if (counter <= (ULONGLONG)0xFFFFFFFF)
{
s.ps_ifdrop = (ULONG)counter;
s.ps_drop = (ULONG)counter;
}
else
{
s.ps_ifdrop = 0xFFFFFFFF;
s.ps_drop = 0xFFFFFFFF;
}
#if defined(_WIN32) && defined(HAVE_REMOTE)
s.ps_capt = pt->TcAcceptedCount;
#endif
*ps = s;
return 0;
}
static struct pcap_stat *
TcStatsEx(pcap_t *p, int *pcap_stat_size)
{
struct pcap_tc *pt = p->priv;
TC_STATISTICS statistics;
TC_STATUS status;
ULONGLONG counter;
*pcap_stat_size = sizeof (p->stat);
status = g_TcFunctions.InstanceQueryStatistics(pt->TcInstance, &statistics);
if (status != TC_SUCCESS)
{
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "TurboCap error in TcInstanceQueryStatistics: %s (%08x)", g_TcFunctions.StatusGetString(status), status);
return NULL;
}
memset(&p->stat, 0, sizeof(p->stat));
status = g_TcFunctions.StatisticsQueryValue(statistics, TC_COUNTER_INSTANCE_TOTAL_RX_PACKETS, &counter);
if (status != TC_SUCCESS)
{
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "TurboCap error in TcStatisticsQueryValue: %s (%08x)", g_TcFunctions.StatusGetString(status), status);
return NULL;
}
if (counter <= (ULONGLONG)0xFFFFFFFF)
{
p->stat.ps_recv = (ULONG)counter;
}
else
{
p->stat.ps_recv = 0xFFFFFFFF;
}
status = g_TcFunctions.StatisticsQueryValue(statistics, TC_COUNTER_INSTANCE_RX_DROPPED_PACKETS, &counter);
if (status != TC_SUCCESS)
{
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "TurboCap error in TcStatisticsQueryValue: %s (%08x)", g_TcFunctions.StatusGetString(status), status);
return NULL;
}
if (counter <= (ULONGLONG)0xFFFFFFFF)
{
p->stat.ps_ifdrop = (ULONG)counter;
p->stat.ps_drop = (ULONG)counter;
}
else
{
p->stat.ps_ifdrop = 0xFFFFFFFF;
p->stat.ps_drop = 0xFFFFFFFF;
}
#ifdef HAVE_REMOTE
p->stat.ps_capt = pt->TcAcceptedCount;
#endif
return &p->stat;
}
int canusb_findalldevs(pcap_if_t **alldevsp, char *err_str)
{
libusb_context *fdctx;
libusb_device** devs;
unsigned char sernum[65];
int cnt, i;
if (libusb_init(&fdctx) != 0) {
/*
* XXX - if this doesn't just mean "no USB file system mounted",
* perhaps we should report a real error rather than just
* saying "no CANUSB devices".
*/
return 0;
}
cnt = libusb_get_device_list(fdctx,&devs);
for(i=0;i<cnt;i++)
{
int ret;
/* Check if this device is interesting. */
struct libusb_device_descriptor desc;
libusb_device_handle *dh;
libusb_get_device_descriptor(devs[i],&desc);
if ((desc.idVendor != CANUSB_VID) || (desc.idProduct != CANUSB_PID))
continue; /* It is not, check next device */
/* It is! */
dh = NULL;
if ((ret = libusb_open(devs[i],&dh)) == 0)
{
char dev_name[30];
char dev_descr[50];
int n = libusb_get_string_descriptor_ascii(dh,desc.iSerialNumber,sernum,64);
sernum[n] = 0;
pcap_snprintf(dev_name, 30, CANUSB_IFACE"%s", sernum);
pcap_snprintf(dev_descr, 50, "CanUSB [%s]", sernum);
libusb_close(dh);
if (pcap_add_if(alldevsp, dev_name, 0, dev_descr, err_str) < 0)
{
libusb_free_device_list(devs,1);
libusb_exit(fdctx);
return -1;
}
}
}
libusb_free_device_list(devs,1);
libusb_exit(fdctx);
return 0;
}
/* Send a packet to the network */
static int TcInject(pcap_t *p, const void *buf, size_t size)
{
struct pcap_tc *pt = p->priv;
TC_STATUS status;
TC_PACKETS_BUFFER buffer;
TC_PACKET_HEADER header;
if (size >= 0xFFFF)
{
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send error: the TurboCap API does not support packets larger than 64k");
return -1;
}
status = g_TcFunctions.PacketsBufferCreate(sizeof(TC_PACKET_HEADER) + TC_ALIGN_USHORT_TO_64BIT((USHORT)size), &buffer);
if (status != TC_SUCCESS)
{
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send error: TcPacketsBufferCreate failure: %s (%08x)", g_TcFunctions.StatusGetString(status), status);
return -1;
}
/*
* we assume that the packet is without the checksum, as common with WinPcap
*/
memset(&header, 0, sizeof(header));
header.Length = (USHORT)size;
header.CapturedLength = header.Length;
status = g_TcFunctions.PacketsBufferCommitNextPacket(buffer, &header, (PVOID)buf);
if (status == TC_SUCCESS)
{
status = g_TcFunctions.InstanceTransmitPackets(pt->TcInstance, buffer);
if (status != TC_SUCCESS)
{
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send error: TcInstanceTransmitPackets failure: %s (%08x)", g_TcFunctions.StatusGetString(status), status);
}
}
else
{
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send error: TcPacketsBufferCommitNextPacket failure: %s (%08x)", g_TcFunctions.StatusGetString(status), status);
}
g_TcFunctions.PacketsBufferDestroy(buffer);
if (status != TC_SUCCESS)
{
return -1;
}
else
{
return 0;
}
}
/* without these identifying probes packet data can't be fully decoded */
static void
probe_devices(int bus)
{
struct usbdevfs_ctrltransfer ctrl;
struct dirent* data;
int ret = 0;
char buf[40];
DIR* dir;
/* scan usb bus directories for device nodes */
pcap_snprintf(buf, sizeof(buf), "/dev/bus/usb/%03d", bus);
dir = opendir(buf);
if (!dir)
return;
while ((ret >= 0) && ((data = readdir(dir)) != 0)) {
int fd;
char* name = data->d_name;
if (name[0] == '.')
continue;
pcap_snprintf(buf, sizeof(buf), "/dev/bus/usb/%03d/%s", bus, data->d_name);
fd = open(buf, O_RDWR);
if (fd == -1)
continue;
/*
* Sigh. Different kernels have different member names
* for this structure.
*/
#ifdef HAVE_USBDEVFS_CTRLTRANSFER_BREQUESTTYPE
ctrl.bRequestType = USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE;
ctrl.bRequest = USB_REQ_GET_DESCRIPTOR;
ctrl.wValue = USB_DT_DEVICE << 8;
ctrl.wIndex = 0;
ctrl.wLength = sizeof(buf);
#else
ctrl.requesttype = USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE;
ctrl.request = USB_REQ_GET_DESCRIPTOR;
ctrl.value = USB_DT_DEVICE << 8;
ctrl.index = 0;
ctrl.length = sizeof(buf);
#endif
ctrl.data = buf;
ctrl.timeout = CTRL_TIMEOUT;
ret = ioctl(fd, USBDEVFS_CONTROL, &ctrl);
close(fd);
}
closedir(dir);
}
/* facility to add an USB device to the device list*/
static int
usb_dev_add(pcap_if_t** alldevsp, int n, char *err_str)
{
char dev_name[10];
char dev_descr[30];
pcap_snprintf(dev_name, 10, USB_IFACE"%d", n);
pcap_snprintf(dev_descr, 30, "USB bus number %d", n);
if (pcap_add_if(alldevsp, dev_name, 0,
dev_descr, err_str) < 0)
return -1;
return 0;
}
/* Determine ppa number that specifies ifname */
static int
get_dlpi_ppa(register int fd, register const char *ifname, register int unit,
register char *ebuf)
{
register const char *cp;
register int kd;
void *addr;
struct ifnet ifnet;
char if_name[sizeof(ifnet.if_name) + 1];
cp = strrchr(ifname, '/');
if (cp != NULL)
ifname = cp + 1;
if (nlist(path_vmunix, &nl) < 0) {
pcap_snprintf(ebuf, PCAP_ERRBUF_SIZE, "nlist %s failed",
path_vmunix);
return (-1);
}
if (nl[NL_IFNET].n_value == 0) {
pcap_snprintf(ebuf, PCAP_ERRBUF_SIZE,
"could't find %s kernel symbol",
nl[NL_IFNET].n_name);
return (-1);
}
kd = open("/dev/kmem", O_RDONLY);
if (kd < 0) {
pcap_snprintf(ebuf, PCAP_ERRBUF_SIZE, "kmem open: %s",
pcap_strerror(errno));
return (-1);
}
if (dlpi_kread(kd, nl[NL_IFNET].n_value,
&addr, sizeof(addr), ebuf) < 0) {
close(kd);
return (-1);
}
for (; addr != NULL; addr = ifnet.if_next) {
if (dlpi_kread(kd, (off_t)addr,
&ifnet, sizeof(ifnet), ebuf) < 0 ||
dlpi_kread(kd, (off_t)ifnet.if_name,
if_name, sizeof(ifnet.if_name), ebuf) < 0) {
(void)close(kd);
return (-1);
}
if_name[sizeof(ifnet.if_name)] = '\0';
if (strcmp(if_name, ifname) == 0 && ifnet.if_unit == unit)
return (ifnet.if_index);
}
pcap_snprintf(ebuf, PCAP_ERRBUF_SIZE, "Can't find %s", ifname);
return (-1);
}
int acn_parse_hosts_file(char *errbuf) { /* returns: -1 = error, 0 = OK */
FILE *fp;
char buf[MAX_LINE_SIZE];
char *ptr, *ptr2;
int pos;
int chassis, geoslot;
unit_t *u;
empty_unit_table();
if ((fp = fopen("/etc/hosts", "r")) == NULL) { /* try to open the hosts file and if it fails */
pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, "Cannot open '/etc/hosts' for reading."); /* return the nohostsfile error response */
return -1;
}
while (fgets(buf, MAX_LINE_SIZE-1, fp)) { /* while looping over the file */
pos = strcspn(buf, "#\n\r"); /* find the first comment character or EOL */
*(buf + pos) = '\0'; /* and clobber it and anything that follows it */
pos = strspn(buf, " \t"); /* then find the first non-white space */
if (pos == strlen(buf)) /* if there is nothing but white space on the line */
continue; /* ignore that empty line */
ptr = buf + pos; /* and skip over any of that leading whitespace */
if ((ptr2 = strstr(ptr, "_I_")) == NULL) /* skip any lines that don't have names that look like they belong to IOPs */
continue;
if (*(ptr2 + 4) != '_') /* and skip other lines that have names that don't look like ACN components */
continue;
*(ptr + strcspn(ptr, " \t")) = '\0'; /* null terminate the IP address so its a standalone string */
chassis = *(ptr2 + 3) - '0'; /* extract the chassis number */
geoslot = *(ptr2 + 5) - '0'; /* and geo-slot number */
if (chassis < 1 || chassis > MAX_CHASSIS ||
geoslot < 1 || geoslot > MAX_GEOSLOT) { /* if the chassis and/or slot numbers appear to be bad... */
pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, "Invalid ACN name in '/etc/hosts'."); /* warn the user */
continue; /* and ignore the entry */
}
if ((ptr2 = (char *)malloc(strlen(ptr) + 1)) == NULL) {
pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
errno, "malloc");
continue;
}
strcpy(ptr2, ptr); /* copy the IP address into our malloc'ed memory */
u = &units[chassis][geoslot];
u->ip = ptr2; /* and remember the whole shebang */
u->chassis = chassis;
u->geoslot = geoslot;
}
fclose(fp);
if (*errbuf) return -1;
else return 0;
}
static int
dbus_read(pcap_t *handle, int max_packets, pcap_handler callback, u_char *user)
{
struct pcap_dbus *handlep = handle->priv;
struct pcap_pkthdr pkth;
DBusMessage *message;
char *raw_msg;
int raw_msg_len;
int count = 0;
message = dbus_connection_pop_message(handlep->conn);
while (!message) {
/* XXX handle->opt.timeout = timeout_ms; */
if (!dbus_connection_read_write(handlep->conn, 100)) {
pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Connection closed");
return -1;
}
if (handle->break_loop) {
handle->break_loop = 0;
return -2;
}
message = dbus_connection_pop_message(handlep->conn);
}
if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "Disconnected");
return -1;
}
if (dbus_message_marshal(message, &raw_msg, &raw_msg_len)) {
pkth.caplen = pkth.len = raw_msg_len;
/* pkth.caplen = min (payload_len, handle->snapshot); */
gettimeofday(&pkth.ts, NULL);
if (handle->fcode.bf_insns == NULL ||
bpf_filter(handle->fcode.bf_insns, (u_char *)raw_msg, pkth.len, pkth.caplen)) {
handlep->packets_read++;
callback(user, &pkth, (u_char *)raw_msg);
count++;
}
dbus_free(raw_msg);
}
return count;
}
int
pcap_platform_finddevs(pcap_if_list_t *devlistp, char *errbuf)
{
#ifdef HAVE_SOLARIS
int fd;
union {
u_int nunits;
char pad[516]; /* XXX - must be at least 513; is 516
in "atmgetunits" */
} buf;
char baname[2+1+1];
u_int i;
#endif
/*
* Get the list of regular interfaces first.
*/
if (pcap_findalldevs_interfaces(devlistp, errbuf, is_dlpi_interface) == -1)
return (-1); /* failure */
#ifdef HAVE_SOLARIS
/*
* We may have to do special magic to get ATM devices.
*/
if ((fd = open("/dev/ba", O_RDWR)) < 0) {
/*
* We couldn't open the "ba" device.
* For now, just give up; perhaps we should
* return an error if the problem is neither
* a "that device doesn't exist" error (ENOENT,
* ENXIO, etc.) or a "you're not allowed to do
* that" error (EPERM, EACCES).
*/
return (0);
}
if (strioctl(fd, A_GET_UNITS, sizeof(buf), (char *)&buf) < 0) {
pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, "A_GET_UNITS: %s",
pcap_strerror(errno));
return (-1);
}
for (i = 0; i < buf.nunits; i++) {
pcap_snprintf(baname, sizeof baname, "ba%u", i);
if (add_dev(devlistp, baname, 0, NULL, errbuf) == NULL)
return (-1);
}
#endif
return (0);
}
/* facility to add an USB device to the device list*/
static int
usb_dev_add(pcap_if_list_t *devlistp, int n, char *err_str)
{
char dev_name[10];
char dev_descr[30];
pcap_snprintf(dev_name, 10, USB_IFACE"%d", n);
if (n == 0)
pcap_snprintf(dev_descr, 30, "All USB buses");
else
pcap_snprintf(dev_descr, 30, "USB bus number %d", n);
if (add_dev(devlistp, dev_name, 0, dev_descr, err_str) == NULL)
return -1;
return 0;
}
/*
* In Solaris, the "standard" mechanism" i.e SIOCGLIFCONF will only find
* network links that are plumbed and are up. dlpi_walk(3DLPI) will find
* additional network links present in the system.
*/
int
pcap_platform_finddevs(pcap_if_t **alldevsp, char *errbuf)
{
int retv = 0;
linknamelist_t *entry, *next;
linkwalk_t lw = {NULL, 0};
int save_errno;
/* dlpi_walk() for loopback will be added here. */
dlpi_walk(list_interfaces, &lw, 0);
if (lw.lw_err != 0) {
pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
"dlpi_walk: %s", pcap_strerror(lw.lw_err));
retv = -1;
goto done;
}
/* Add linkname if it does not exist on the list. */
for (entry = lw.lw_list; entry != NULL; entry = entry->lnl_next) {
if (pcap_add_if(alldevsp, entry->linkname, 0, NULL, errbuf) < 0)
retv = -1;
}
done:
save_errno = errno;
for (entry = lw.lw_list; entry != NULL; entry = next) {
next = entry->lnl_next;
free(entry);
}
errno = save_errno;
return (retv);
}
static pcap_dumper_t *
pcap_setup_dump(pcap_t *p, int linktype, FILE *f, const char *fname)
{
#if defined(_WIN32) || defined(MSDOS)
/*
* If we're writing to the standard output, put it in binary
* mode, as savefiles are binary files.
*
* Otherwise, we turn off buffering.
* XXX - why? And why not on the standard output?
*/
if (f == stdout)
SET_BINMODE(f);
else
setbuf(f, NULL);
#endif
if (sf_write_header(p, f, linktype, p->tzoff, p->snapshot) == -1) {
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "Can't write to %s: %s",
fname, pcap_strerror(errno));
if (f != stdout)
(void)fclose(f);
return (NULL);
}
return ((pcap_dumper_t *)f);
}
static HANDLE
sf_getevent(pcap_t *pcap)
{
(void)pcap_snprintf(pcap->errbuf, sizeof(pcap->errbuf),
"The read event cannot be retrieved while reading from a file");
return (INVALID_HANDLE_VALUE);
}
static int
sf_setmintocopy(pcap_t *p, int size)
{
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"The mintocopy parameter cannot be set while reading from a file");
return (-1);
}
static int
sf_setmode(pcap_t *p, int mode)
{
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"impossible to set mode while reading from a file");
return (-1);
}
static int
sf_setbuff(pcap_t *p, int dim)
{
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"The kernel buffer size cannot be set while reading from a file");
return (-1);
}
static struct pcap_stat *
sf_stats_ex(pcap_t *p, int *size)
{
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"Statistics aren't available from savefiles");
return (NULL);
}
/*
* Win32-only routine for getting statistics.
*
* This way is definitely safer than passing the pcap_stat * from the userland.
* In fact, there could happen than the user allocates a variable which is not
* big enough for the new structure, and the library will write in a zone
* which is not allocated to this variable.
*
* In this way, we're pretty sure we are writing on memory allocated to this
* variable.
*
* XXX - but this is the wrong way to handle statistics. Instead, we should
* have an API that returns data in a form like the Options section of a
* pcapng Interface Statistics Block:
*
* http://xml2rfc.tools.ietf.org/cgi-bin/xml2rfc.cgi?url=https://raw.githubusercontent.com/pcapng/pcapng/master/draft-tuexen-opsawg-pcapng.xml&modeAsFormat=html/ascii&type=ascii#rfc.section.4.6
*
* which would let us add new statistics straightforwardly and indicate which
* statistics we are and are *not* providing, rather than having to provide
* possibly-bogus values for statistics we can't provide.
*/
struct pcap_stat *
pcap_stats_ex_win32(pcap_t *p, int *pcap_stat_size)
{
struct pcap_win *pw = p->priv;
struct bpf_stat bstats;
char errbuf[PCAP_ERRBUF_SIZE+1];
*pcap_stat_size = sizeof (p->stat);
/*
* Try to get statistics.
*
* (Please note - "struct pcap_stat" is *not* the same as
* WinPcap's "struct bpf_stat". It might currently have the
* same layout, but let's not cheat.)
*/
if (!PacketGetStatsEx(pw->adapter, &bstats)) {
pcap_win32_err_to_str(GetLastError(), errbuf);
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"PacketGetStatsEx error: %s", errbuf);
return (NULL);
}
p->stat.ps_recv = bstats.bs_recv;
p->stat.ps_drop = bstats.bs_drop;
p->stat.ps_ifdrop = bstats.ps_ifdrop;
#ifdef ENABLE_REMOTE
p->stat.ps_capt = bstats.bs_capt;
#endif
return (&p->stat);
}
static void *
get_from_block_data(struct block_cursor *cursor, size_t chunk_size,
char *errbuf)
{
void *data;
/*
* Make sure we have the specified amount of data remaining in
* the block data.
*/
if (cursor->data_remaining < chunk_size) {
pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
"block of type %u in pcap-ng dump file is too short",
cursor->block_type);
return (NULL);
}
/*
* Return the current pointer, and skip past the chunk.
*/
data = cursor->data;
cursor->data += chunk_size;
cursor->data_remaining -= chunk_size;
return (data);
}
static int
usb_inject_linux(pcap_t *handle, const void *buf, size_t size)
{
pcap_snprintf(handle->errbuf, PCAP_ERRBUF_SIZE, "inject not supported on "
"USB devices");
return (-1);
}
/*
* \brief It translates an address from the 'presentation' form into the 'network' form.
*
* This function basically replaces inet_pton(), which does not exist in Winsock because
* the same result can be obtained by using the getaddrinfo().
* An additional advantage is that 'Address' can be both a numeric address (e.g. '127.0.0.1',
* like in inet_pton() ) and a literal name (e.g. 'localhost').
*
* This function does the reverse job of sock_getascii_addrport().
*
* \param address: a zero-terminated string which contains the name you have to
* translate. The name can be either literal (e.g. 'localhost') or numeric (e.g. '::1').
*
* \param sockaddr: a user-allocated sockaddr_storage structure which will contains the
* 'network' form of the requested address.
*
* \param addr_family: a constant which can assume the following values:
* - 'AF_INET' if we want to ping an IPv4 host
* - 'AF_INET6' if we want to ping an IPv6 host
* - 'AF_UNSPEC' if we do not have preferences about the protocol used to ping the host
*
* \param errbuf: a pointer to an user-allocated buffer that will contain the complete
* error message. This buffer has to be at least 'errbuflen' in length.
* It can be NULL; in this case the error cannot be printed.
*
* \param errbuflen: length of the buffer that will contains the error. The error message cannot be
* larger than 'errbuflen - 1' because the last char is reserved for the string terminator.
*
* \return '-1' if the translation succeeded, '-2' if there was some non critical error, '0'
* otherwise. In case it fails, the content of the SockAddr variable remains unchanged.
* A 'non critical error' can occur in case the 'Address' is a literal name, which can be mapped
* to several network addresses (e.g. 'foo.bar.com' => '10.2.2.2' and '10.2.2.3'). In this case
* the content of the SockAddr parameter will be the address corresponding to the first mapping.
*
* \warning The sockaddr_storage structure MUST be allocated by the user.
*/
int sock_present2network(const char *address, struct sockaddr_storage *sockaddr, int addr_family, char *errbuf, int errbuflen)
{
int retval;
struct addrinfo *addrinfo;
struct addrinfo hints;
memset(&hints, 0, sizeof(hints));
hints.ai_family = addr_family;
if ((retval = sock_initaddress(address, "22222" /* fake port */, &hints, &addrinfo, errbuf, errbuflen)) == -1)
return 0;
if (addrinfo->ai_family == PF_INET)
memcpy(sockaddr, addrinfo->ai_addr, sizeof(struct sockaddr_in));
else
memcpy(sockaddr, addrinfo->ai_addr, sizeof(struct sockaddr_in6));
if (addrinfo->ai_next != NULL)
{
freeaddrinfo(addrinfo);
if (errbuf)
pcap_snprintf(errbuf, errbuflen, "More than one socket requested; using the first one returned");
return -2;
}
freeaddrinfo(addrinfo);
return -1;
}
static int
sf_stats(pcap_t *p, struct pcap_stat *ps)
{
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"Statistics aren't available from savefiles");
return (-1);
}
/*
* Attempts to open a regular interface fail.
*/
pcap_t *
pcap_create_interface(const char *device, char *errbuf)
{
pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
"This version of libpcap only supports SNF cards");
return NULL;
}
static int
pcap_oid_get_request_win32(pcap_t *p, bpf_u_int32 oid, void *data, size_t *lenp)
{
struct pcap_win *pw = p->priv;
PACKET_OID_DATA *oid_data_arg;
char errbuf[PCAP_ERRBUF_SIZE+1];
/*
* Allocate a PACKET_OID_DATA structure to hand to PacketRequest().
* It should be big enough to hold "*lenp" bytes of data; it
* will actually be slightly larger, as PACKET_OID_DATA has a
* 1-byte data array at the end, standing in for the variable-length
* data that's actually there.
*/
oid_data_arg = malloc(sizeof (PACKET_OID_DATA) + *lenp);
if (oid_data_arg == NULL) {
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"Couldn't allocate argument buffer for PacketRequest");
return (PCAP_ERROR);
}
/*
* No need to copy the data - we're doing a fetch.
*/
oid_data_arg->Oid = oid;
oid_data_arg->Length = (ULONG)(*lenp); /* XXX - check for ridiculously large value? */
if (!PacketRequest(pw->adapter, FALSE, oid_data_arg)) {
pcap_win32_err_to_str(GetLastError(), errbuf);
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"Error calling PacketRequest: %s", errbuf);
free(oid_data_arg);
return (PCAP_ERROR);
}
/*
* Get the length actually supplied.
*/
*lenp = oid_data_arg->Length;
/*
* Copy back the data we fetched.
*/
memcpy(data, oid_data_arg->Data, *lenp);
free(oid_data_arg);
return (0);
}