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ptp-pack.c
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/* ptp-pack.c
*
* Copyright (C) 2001-2004 Mariusz Woloszyn <[email protected]>
* Copyright (C) 2003-2019 Marcus Meissner <[email protected]>
* Copyright (C) 2006-2008 Linus Walleij <[email protected]>
* Copyright (C) 2007 Tero Saarni <[email protected]>
* Copyright (C) 2009 Axel Waggershauser <[email protected]>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
/* currently this file is included into ptp.c */
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#ifndef UINT_MAX
# define UINT_MAX 0xFFFFFFFF
#endif
#if defined(HAVE_ICONV) && defined(HAVE_LANGINFO_H)
#include <iconv.h>
#endif
#ifndef MAX
# define MAX(a, b) ((a) > (b) ? (a) : (b))
#endif
#ifndef MIN
# define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif
static inline uint16_t
htod16p (PTPParams *params, uint16_t var)
{
return ((params->byteorder==PTP_DL_LE)?htole16(var):htobe16(var));
}
static inline uint32_t
htod32p (PTPParams *params, uint32_t var)
{
return ((params->byteorder==PTP_DL_LE)?htole32(var):htobe32(var));
}
static inline void
htod16ap (PTPParams *params, unsigned char *a, uint16_t val)
{
if (params->byteorder==PTP_DL_LE)
htole16a(a,val);
else
htobe16a(a,val);
}
static inline void
htod32ap (PTPParams *params, unsigned char *a, uint32_t val)
{
if (params->byteorder==PTP_DL_LE)
htole32a(a,val);
else
htobe32a(a,val);
}
static inline void
htod64ap (PTPParams *params, unsigned char *a, uint64_t val)
{
if (params->byteorder==PTP_DL_LE)
htole64a(a,val);
else
htobe64a(a,val);
}
static inline uint16_t
dtoh16p (PTPParams *params, uint16_t var)
{
return ((params->byteorder==PTP_DL_LE)?le16toh(var):be16toh(var));
}
static inline uint32_t
dtoh32p (PTPParams *params, uint32_t var)
{
return ((params->byteorder==PTP_DL_LE)?le32toh(var):be32toh(var));
}
static inline uint64_t
dtoh64p (PTPParams *params, uint64_t var)
{
return ((params->byteorder==PTP_DL_LE)?le64toh(var):be64toh(var));
}
static inline uint16_t
dtoh16ap (PTPParams *params, const unsigned char *a)
{
return ((params->byteorder==PTP_DL_LE)?le16atoh(a):be16atoh(a));
}
static inline uint32_t
dtoh32ap (PTPParams *params, const unsigned char *a)
{
return ((params->byteorder==PTP_DL_LE)?le32atoh(a):be32atoh(a));
}
static inline uint64_t
dtoh64ap (PTPParams *params, const unsigned char *a)
{
return ((params->byteorder==PTP_DL_LE)?le64atoh(a):be64atoh(a));
}
#define htod8a(a,x) *(uint8_t*)(a) = x
#define htod16a(a,x) htod16ap(params,a,x)
#define htod32a(a,x) htod32ap(params,a,x)
#define htod64a(a,x) htod64ap(params,a,x)
#define htod16(x) htod16p(params,x)
#define htod32(x) htod32p(params,x)
#define htod64(x) htod64p(params,x)
#define dtoh8a(x) (*(uint8_t*)(x))
#define dtoh16a(a) dtoh16ap(params,a)
#define dtoh32a(a) dtoh32ap(params,a)
#define dtoh64a(a) dtoh64ap(params,a)
#define dtoh16(x) dtoh16p(params,x)
#define dtoh32(x) dtoh32p(params,x)
#define dtoh64(x) dtoh64p(params,x)
/*
* PTP strings ... if the size field is:
* size 0 : "empty string" ... we interpret that as string with just \0 terminator, return 1
* (the whole PTP standard is not that clear, it occasionally refers to strings as optional in such cases, but no clear guidance).
* size > 0: all other strings have a terminating \0, included in the length (not sure how conforming everyone is here)
*
* len - in ptp string characters currently
*/
static inline int
ptp_unpack_string(PTPParams *params, const unsigned char* data, uint32_t offset, uint32_t total, uint8_t *len, char **retstr)
{
uint8_t length;
uint16_t string[PTP_MAXSTRLEN+1];
/* allow for UTF-8: max of 3 bytes per UCS-2 char, plus final null */
char loclstr[PTP_MAXSTRLEN*3+1];
size_t nconv, srclen, destlen;
char *src, *dest;
*len = 0;
*retstr = NULL;
if (offset + 1 > total)
return 0;
length = dtoh8a(&data[offset]); /* PTP_MAXSTRLEN == 255, 8 bit len */
if (length == 0) { /* nothing to do? */
*len = 0;
*retstr = strdup(""); /* return an empty string, not NULL */
return 1;
}
if (offset + 1 + length*sizeof(string[0]) > total)
return 0;
*len = length;
/* copy to string[] to ensure correct alignment for iconv(3) */
memcpy(string, &data[offset+1], length * sizeof(string[0]));
string[length] = 0x0000U; /* be paranoid! add a terminator. */
loclstr[0] = '\0';
/* convert from camera UCS-2 to our locale */
src = (char *)string;
srclen = length * sizeof(string[0]);
dest = loclstr;
destlen = sizeof(loclstr)-1;
nconv = (size_t)-1;
#if defined(HAVE_ICONV) && defined(HAVE_LANGINFO_H)
if (params->cd_ucs2_to_locale != (iconv_t)-1)
nconv = iconv(params->cd_ucs2_to_locale, &src, &srclen, &dest, &destlen);
#endif
if (nconv == (size_t) -1) { /* do it the hard way */
int i;
/* try the old way, in case iconv is broken */
for (i=0;i<length;i++) {
if (dtoh16a(&data[offset+1+2*i])>127)
loclstr[i] = '?';
else
loclstr[i] = dtoh16a(&data[offset+1+2*i]);
}
dest = loclstr+length;
}
*dest = '\0';
loclstr[sizeof(loclstr)-1] = '\0'; /* be safe? */
*retstr = strdup(loclstr);
return 1;
}
static inline int
ucs2strlen(uint16_t const * const unicstr)
{
int length = 0;
/* Unicode strings are terminated with 2 * 0x00 */
for(length = 0; unicstr[length] != 0x0000U; length ++);
return length;
}
static inline void
ptp_pack_string(PTPParams *params, const char *string, unsigned char* data, uint16_t offset, uint8_t *len)
{
int packedlen = 0;
uint16_t ucs2str[PTP_MAXSTRLEN+1];
char *ucs2strp = (char *) ucs2str;
size_t convlen = strlen(string);
/* Cannot exceed 255 (PTP_MAXSTRLEN) since it is a single byte, duh ... */
memset(ucs2strp, 0, sizeof(ucs2str)); /* XXX: necessary? */
#if defined(HAVE_ICONV) && defined(HAVE_LANGINFO_H)
if (params->cd_locale_to_ucs2 != (iconv_t)-1) {
size_t nconv;
size_t convmax = PTP_MAXSTRLEN * 2; /* Includes the terminator */
char *inbuf = (char*)string; /* the 'internet' says iconv will not change the input string */
nconv = iconv(params->cd_locale_to_ucs2, &inbuf, &convlen,
&ucs2strp, &convmax);
if (nconv == (size_t) -1)
ucs2str[0] = 0x0000U;
} else
#endif
{
unsigned int i;
for (i=0;i<convlen;i++) {
ucs2str[i] = string[i];
}
ucs2str[convlen] = 0;
}
/*
* XXX: isn't packedlen just ( (uint16_t *)ucs2strp - ucs2str )?
* why do we need ucs2strlen()?
*/
packedlen = ucs2strlen(ucs2str);
if (packedlen > PTP_MAXSTRLEN-1) {
*len=0;
return;
}
/* number of characters including terminating 0 (PTP standard confirmed) */
htod8a(&data[offset],packedlen+1);
memcpy(&data[offset+1], &ucs2str[0], packedlen * sizeof(ucs2str[0]));
htod16a(&data[offset+packedlen*2+1], 0x0000); /* terminate 0 */
/* The returned length is in number of characters */
*len = (uint8_t) packedlen+1;
}
static inline unsigned char *
ptp_get_packed_stringcopy(PTPParams *params, const char *string, uint32_t *packed_size)
{
uint8_t packed[PTP_MAXSTRLEN*2+3], len;
size_t plen;
unsigned char *retcopy = NULL;
if (string == NULL)
ptp_pack_string(params, "", (unsigned char*) packed, 0, &len);
else
ptp_pack_string(params, string, (unsigned char*) packed, 0, &len);
/* returned length is in characters, then one byte for string length */
plen = len*2 + 1;
retcopy = malloc(plen);
if (!retcopy) {
*packed_size = 0;
return NULL;
}
memcpy(retcopy, packed, plen);
*packed_size = plen;
return (retcopy);
}
static inline uint32_t
ptp_unpack_uint32_t_array(PTPParams *params, const unsigned char* data, unsigned int offset, unsigned int datalen, uint32_t **array)
{
uint32_t n, i=0;
if (!data)
return 0;
if (offset >= datalen)
return 0;
if (offset + sizeof(uint32_t) > datalen)
return 0;
*array = NULL;
n=dtoh32a(&data[offset]);
if (n >= UINT_MAX/sizeof(uint32_t))
return 0;
if (!n)
return 0;
if (offset + sizeof(uint32_t)*(n+1) > datalen) {
ptp_debug (params ,"array runs over datalen bufferend (%ld vs %d)", offset + sizeof(uint32_t)*(n+1) , datalen);
return 0;
}
*array = calloc (n,sizeof(uint32_t));
if (!*array)
return 0;
for (i=0;i<n;i++)
(*array)[i]=dtoh32a(&data[offset+(sizeof(uint32_t)*(i+1))]);
return n;
}
static inline uint32_t
ptp_pack_uint32_t_array(PTPParams *params, const uint32_t *array, uint32_t arraylen, unsigned char **data )
{
uint32_t i=0;
*data = calloc ((arraylen+1),sizeof(uint32_t));
if (!*data)
return 0;
htod32a(&(*data)[0],arraylen);
for (i=0;i<arraylen;i++)
htod32a(&(*data)[sizeof(uint32_t)*(i+1)], array[i]);
return (arraylen+1)*sizeof(uint32_t);
}
static inline uint32_t
ptp_unpack_uint16_t_array(PTPParams *params, const unsigned char* data, unsigned int offset, unsigned int datalen, uint16_t **array)
{
uint32_t n, i=0;
if (!data)
return 0;
*array = NULL;
if (datalen - offset < sizeof(uint32_t))
return 0;
n=dtoh32a(&data[offset]);
if (n >= (UINT_MAX - offset - sizeof(uint32_t))/sizeof(uint16_t))
return 0;
if (!n)
return 0;
if (offset + sizeof(uint32_t) > datalen)
return 0;
if (offset + sizeof(uint32_t)+sizeof(uint16_t)*n > datalen) {
ptp_debug (params ,"array runs over datalen bufferend (%ld vs %d)", offset + sizeof(uint32_t)+n*sizeof(uint16_t) , datalen);
return 0;
}
*array = calloc (n,sizeof(uint16_t));
if (!*array)
return 0;
for (i=0;i<n;i++)
(*array)[i]=dtoh16a(&data[offset+(sizeof(uint16_t)*(i+2))]);
return n;
}
/* DeviceInfo pack/unpack */
#define PTP_di_StandardVersion 0
#define PTP_di_VendorExtensionID 2
#define PTP_di_VendorExtensionVersion 6
#define PTP_di_VendorExtensionDesc 8
#define PTP_di_FunctionalMode 8
#define PTP_di_OperationsSupported 10
static inline int
ptp_unpack_DI (PTPParams *params, const unsigned char* data, PTPDeviceInfo *di, unsigned int datalen)
{
uint8_t len;
unsigned int totallen;
if (!data) return 0;
if (datalen < 12) return 0;
memset (di, 0, sizeof(*di));
di->StandardVersion = dtoh16a(&data[PTP_di_StandardVersion]);
di->VendorExtensionID =
dtoh32a(&data[PTP_di_VendorExtensionID]);
di->VendorExtensionVersion =
dtoh16a(&data[PTP_di_VendorExtensionVersion]);
if (!ptp_unpack_string(params, data,
PTP_di_VendorExtensionDesc,
datalen,
&len,
&di->VendorExtensionDesc)
)
return 0;
totallen=len*2+1;
if (datalen <= totallen + PTP_di_FunctionalMode + sizeof(uint16_t)) {
ptp_debug (params, "datalen %d <= totallen + PTP_di_FunctionalMode + sizeof(uint16_t) %ld",
datalen, totallen + PTP_di_FunctionalMode + sizeof(uint16_t));
return 0;
}
di->FunctionalMode =
dtoh16a(&data[PTP_di_FunctionalMode+totallen]);
di->OperationsSupported_len = ptp_unpack_uint16_t_array(params, data,
PTP_di_OperationsSupported+totallen,
datalen,
&di->OperationsSupported);
totallen=totallen+di->OperationsSupported_len*sizeof(uint16_t)+sizeof(uint32_t);
if (datalen <= totallen+PTP_di_OperationsSupported) {
ptp_debug (params, "datalen %d <= totallen+PTP_di_OperationsSupported %d 1", datalen, totallen+PTP_di_OperationsSupported);
return 0;
}
di->EventsSupported_len = ptp_unpack_uint16_t_array(params, data,
PTP_di_OperationsSupported+totallen,
datalen,
&di->EventsSupported);
totallen=totallen+di->EventsSupported_len*sizeof(uint16_t)+sizeof(uint32_t);
if (datalen <= totallen+PTP_di_OperationsSupported) {
ptp_debug (params, "datalen %d <= totallen+PTP_di_OperationsSupported %d 2", datalen, totallen+PTP_di_OperationsSupported);
return 0;
}
di->DevicePropertiesSupported_len =
ptp_unpack_uint16_t_array(params, data,
PTP_di_OperationsSupported+totallen,
datalen,
&di->DevicePropertiesSupported);
totallen=totallen+di->DevicePropertiesSupported_len*sizeof(uint16_t)+sizeof(uint32_t);
if (datalen <= totallen+PTP_di_OperationsSupported) {
ptp_debug (params, "datalen %d <= totallen+PTP_di_OperationsSupported %d 3", datalen, totallen+PTP_di_OperationsSupported);
return 0;
}
di->CaptureFormats_len = ptp_unpack_uint16_t_array(params, data,
PTP_di_OperationsSupported+totallen,
datalen,
&di->CaptureFormats);
totallen=totallen+di->CaptureFormats_len*sizeof(uint16_t)+sizeof(uint32_t);
if (datalen <= totallen+PTP_di_OperationsSupported) {
ptp_debug (params, "datalen %d <= totallen+PTP_di_OperationsSupported %d 4", datalen, totallen+PTP_di_OperationsSupported);
return 0;
}
di->ImageFormats_len = ptp_unpack_uint16_t_array(params, data,
PTP_di_OperationsSupported+totallen,
datalen,
&di->ImageFormats);
totallen=totallen+di->ImageFormats_len*sizeof(uint16_t)+sizeof(uint32_t);
if (datalen <= totallen+PTP_di_OperationsSupported) {
ptp_debug (params, "datalen %d <= totallen+PTP_di_OperationsSupported %d 5", datalen, totallen+PTP_di_OperationsSupported);
return 0;
}
if (!ptp_unpack_string(params, data,
PTP_di_OperationsSupported+totallen,
datalen,
&len,
&di->Manufacturer)
)
return 0;
totallen+=len*2+1;
/* be more relaxed ... as these are optional its ok if they are not here */
if (datalen <= totallen+PTP_di_OperationsSupported) {
ptp_debug (params, "datalen %d <= totallen+PTP_di_OperationsSupported %d 6", datalen, totallen+PTP_di_OperationsSupported);
return 1;
}
if (!ptp_unpack_string(params, data,
PTP_di_OperationsSupported+totallen,
datalen,
&len,
&di->Model)
)
return 1;
totallen+=len*2+1;
/* be more relaxed ... as these are optional its ok if they are not here */
if (datalen <= totallen+PTP_di_OperationsSupported) {
ptp_debug (params, "datalen %d <= totallen+PTP_di_OperationsSupported %d 7", datalen, totallen+PTP_di_OperationsSupported);
return 1;
}
if (!ptp_unpack_string(params, data,
PTP_di_OperationsSupported+totallen,
datalen,
&len,
&di->DeviceVersion)
)
return 1;
totallen+=len*2+1;
/* be more relaxed ... as these are optional its ok if they are not here */
if (datalen <= totallen+PTP_di_OperationsSupported) {
ptp_debug (params, "datalen %d <= totallen+PTP_di_OperationsSupported %d 8", datalen, totallen+PTP_di_OperationsSupported);
return 1;
}
if (!ptp_unpack_string(params, data,
PTP_di_OperationsSupported+totallen,
datalen,
&len,
&di->SerialNumber)
)
return 1;
return 1;
}
inline static void
ptp_free_DI (PTPDeviceInfo *di) {
free (di->SerialNumber);
free (di->DeviceVersion);
free (di->Model);
free (di->Manufacturer);
free (di->ImageFormats);
free (di->CaptureFormats);
free (di->VendorExtensionDesc);
free (di->OperationsSupported);
free (di->EventsSupported);
free (di->DevicePropertiesSupported);
memset(di, 0, sizeof(*di));
}
/* EOS Device Info unpack */
static inline int
ptp_unpack_EOS_DI (PTPParams *params, const unsigned char* data, PTPCanonEOSDeviceInfo *di, unsigned int datalen)
{
unsigned int totallen = 4;
memset (di,0, sizeof(*di));
if (datalen < 8) return 0;
/* uint32_t struct len - ignore */
di->EventsSupported_len = ptp_unpack_uint32_t_array(params, data,
totallen, datalen, &di->EventsSupported);
if (!di->EventsSupported) return 0;
totallen += di->EventsSupported_len*sizeof(uint32_t)+4;
if (totallen >= datalen) return 0;
di->DevicePropertiesSupported_len = ptp_unpack_uint32_t_array(params, data,
totallen, datalen, &di->DevicePropertiesSupported);
if (!di->DevicePropertiesSupported) return 0;
totallen += di->DevicePropertiesSupported_len*sizeof(uint32_t)+4;
if (totallen >= datalen) return 0;
di->unk_len = ptp_unpack_uint32_t_array(params, data,
totallen, datalen, &di->unk);
if (!di->unk) return 0;
totallen += di->unk_len*sizeof(uint32_t)+4;
return 1;
}
static inline void
ptp_free_EOS_DI (PTPCanonEOSDeviceInfo *di)
{
free (di->EventsSupported);
free (di->DevicePropertiesSupported);
free (di->unk);
}
/* ObjectHandles array pack/unpack */
#define PTP_oh 0
static inline void
ptp_unpack_OH (PTPParams *params, const unsigned char* data, PTPObjectHandles *oh, unsigned int len)
{
if (len) {
oh->n = ptp_unpack_uint32_t_array(params, data, PTP_oh, len, &oh->Handler);
} else {
oh->n = 0;
oh->Handler = NULL;
}
}
/* StoreIDs array pack/unpack */
#define PTP_sids 0
static inline void
ptp_unpack_SIDs (PTPParams *params, const unsigned char* data, PTPStorageIDs *sids, unsigned int len)
{
sids->n = 0;
sids->Storage = NULL;
if (!data || !len)
return;
sids->n = ptp_unpack_uint32_t_array(params, data, PTP_sids, len, &sids->Storage);
}
/* StorageInfo pack/unpack */
#define PTP_si_StorageType 0
#define PTP_si_FilesystemType 2
#define PTP_si_AccessCapability 4
#define PTP_si_MaxCapability 6
#define PTP_si_FreeSpaceInBytes 14
#define PTP_si_FreeSpaceInImages 22
#define PTP_si_StorageDescription 26
static inline int
ptp_unpack_SI (PTPParams *params, const unsigned char* data, PTPStorageInfo *si, unsigned int len)
{
uint8_t storagedescriptionlen;
if (!data || len < 26) return 0;
si->StorageType=dtoh16a(&data[PTP_si_StorageType]);
si->FilesystemType=dtoh16a(&data[PTP_si_FilesystemType]);
si->AccessCapability=dtoh16a(&data[PTP_si_AccessCapability]);
si->MaxCapability=dtoh64a(&data[PTP_si_MaxCapability]);
si->FreeSpaceInBytes=dtoh64a(&data[PTP_si_FreeSpaceInBytes]);
si->FreeSpaceInImages=dtoh32a(&data[PTP_si_FreeSpaceInImages]);
/* FIXME: check more lengths here */
if (!ptp_unpack_string(params, data,
PTP_si_StorageDescription,
len,
&storagedescriptionlen,
&si->StorageDescription)
)
return 0;
if (!ptp_unpack_string(params, data,
PTP_si_StorageDescription+storagedescriptionlen*2+1,
len,
&storagedescriptionlen,
&si->VolumeLabel)) {
ptp_debug(params, "could not unpack storage description");
return 0;
}
return 1;
}
/* ObjectInfo pack/unpack */
#define PTP_oi_StorageID 0
#define PTP_oi_ObjectFormat 4
#define PTP_oi_ProtectionStatus 6
#define PTP_oi_ObjectCompressedSize 8
#define PTP_oi_ThumbFormat 12
#define PTP_oi_ThumbCompressedSize 14
#define PTP_oi_ThumbPixWidth 18
#define PTP_oi_ThumbPixHeight 22
#define PTP_oi_ImagePixWidth 26
#define PTP_oi_ImagePixHeight 30
#define PTP_oi_ImageBitDepth 34
#define PTP_oi_ParentObject 38
#define PTP_oi_AssociationType 42
#define PTP_oi_AssociationDesc 44
#define PTP_oi_SequenceNumber 48
#define PTP_oi_filenamelen 52
#define PTP_oi_Filename 53
/* the max length assuming zero length dates. We have need 3 */
/* bytes for these. */
#define PTP_oi_MaxLen PTP_oi_Filename+(PTP_MAXSTRLEN+1)*2+3
static inline uint32_t
ptp_pack_OI (PTPParams *params, PTPObjectInfo *oi, unsigned char** oidataptr)
{
unsigned char* oidata;
uint8_t filenamelen;
uint8_t capturedatelen=0;
/* let's allocate some memory first; correct assuming zero length dates */
oidata=malloc(PTP_oi_MaxLen + params->ocs64*4);
*oidataptr=oidata;
/* the caller should free it after use! */
#if 0
char *capture_date="20020101T010101"; /* XXX Fake date */
#endif
memset (oidata, 0, PTP_oi_MaxLen + params->ocs64*4);
htod32a(&oidata[PTP_oi_StorageID],oi->StorageID);
htod16a(&oidata[PTP_oi_ObjectFormat],oi->ObjectFormat);
htod16a(&oidata[PTP_oi_ProtectionStatus],oi->ProtectionStatus);
htod32a(&oidata[PTP_oi_ObjectCompressedSize],oi->ObjectCompressedSize);
if (params->ocs64)
oidata += 4;
htod16a(&oidata[PTP_oi_ThumbFormat],oi->ThumbFormat);
htod32a(&oidata[PTP_oi_ThumbCompressedSize],oi->ThumbCompressedSize);
htod32a(&oidata[PTP_oi_ThumbPixWidth],oi->ThumbPixWidth);
htod32a(&oidata[PTP_oi_ThumbPixHeight],oi->ThumbPixHeight);
htod32a(&oidata[PTP_oi_ImagePixWidth],oi->ImagePixWidth);
htod32a(&oidata[PTP_oi_ImagePixHeight],oi->ImagePixHeight);
htod32a(&oidata[PTP_oi_ImageBitDepth],oi->ImageBitDepth);
htod32a(&oidata[PTP_oi_ParentObject],oi->ParentObject);
htod16a(&oidata[PTP_oi_AssociationType],oi->AssociationType);
htod32a(&oidata[PTP_oi_AssociationDesc],oi->AssociationDesc);
htod32a(&oidata[PTP_oi_SequenceNumber],oi->SequenceNumber);
ptp_pack_string(params, oi->Filename, oidata, PTP_oi_filenamelen, &filenamelen);
/*
filenamelen=(uint8_t)strlen(oi->Filename);
htod8a(&req->data[PTP_oi_filenamelen],filenamelen+1);
for (i=0;i<filenamelen && i< PTP_MAXSTRLEN; i++) {
req->data[PTP_oi_Filename+i*2]=oi->Filename[i];
}
*/
/*
*XXX Fake date.
* for example Kodak sets Capture date on the basis of EXIF data.
* Spec says that this field is from perspective of Initiator.
*/
#if 0 /* seems now we don't need any data packed in OI dataset... for now ;)*/
capturedatelen=strlen(capture_date);
htod8a(&data[PTP_oi_Filename+(filenamelen+1)*2],
capturedatelen+1);
for (i=0;i<capturedatelen && i< PTP_MAXSTRLEN; i++) {
data[PTP_oi_Filename+(i+filenamelen+1)*2+1]=capture_date[i];
}
htod8a(&data[PTP_oi_Filename+(filenamelen+capturedatelen+2)*2+1],
capturedatelen+1);
for (i=0;i<capturedatelen && i< PTP_MAXSTRLEN; i++) {
data[PTP_oi_Filename+(i+filenamelen+capturedatelen+2)*2+2]=
capture_date[i];
}
#endif
/* XXX this function should return dataset length */
return (PTP_oi_Filename+filenamelen*2+(capturedatelen+1)*3)+params->ocs64*4;
}
static time_t
ptp_unpack_PTPTIME (const char *str) {
char ptpdate[40];
char tmp[5];
size_t ptpdatelen;
struct tm tm;
if (!str)
return 0;
ptpdatelen = strlen(str);
if (ptpdatelen >= sizeof (ptpdate)) {
/*ptp_debug (params ,"datelen is larger then size of buffer", ptpdatelen, (int)sizeof(ptpdate));*/
return 0;
}
if (ptpdatelen<15) {
/*ptp_debug (params ,"datelen is less than 15 (%d)", ptpdatelen);*/
return 0;
}
strncpy (ptpdate, str, sizeof(ptpdate));
ptpdate[sizeof(ptpdate) - 1] = '\0';
memset(&tm,0,sizeof(tm));
strncpy (tmp, ptpdate, 4);
tmp[4] = 0;
tm.tm_year=atoi (tmp) - 1900;
strncpy (tmp, ptpdate + 4, 2);
tmp[2] = 0;
tm.tm_mon = atoi (tmp) - 1;
strncpy (tmp, ptpdate + 6, 2);
tmp[2] = 0;
tm.tm_mday = atoi (tmp);
strncpy (tmp, ptpdate + 9, 2);
tmp[2] = 0;
tm.tm_hour = atoi (tmp);
strncpy (tmp, ptpdate + 11, 2);
tmp[2] = 0;
tm.tm_min = atoi (tmp);
strncpy (tmp, ptpdate + 13, 2);
tmp[2] = 0;
tm.tm_sec = atoi (tmp);
tm.tm_isdst = -1;
return mktime (&tm);
}
static inline void
ptp_unpack_OI (PTPParams *params, const unsigned char* data, PTPObjectInfo *oi, unsigned int len)
{
uint8_t filenamelen;
uint8_t capturedatelen;
char *capture_date;
if (!data || len < PTP_oi_SequenceNumber)
return;
oi->Filename = oi->Keywords = NULL;
/* FIXME: also handle length with all the strings at the end */
oi->StorageID=dtoh32a(&data[PTP_oi_StorageID]);
oi->ObjectFormat=dtoh16a(&data[PTP_oi_ObjectFormat]);
oi->ProtectionStatus=dtoh16a(&data[PTP_oi_ProtectionStatus]);
oi->ObjectCompressedSize=dtoh32a(&data[PTP_oi_ObjectCompressedSize]);
/* Stupid Samsung Galaxy developers emit a 64bit objectcompressedsize */
if ((data[PTP_oi_filenamelen] == 0) && (data[PTP_oi_filenamelen+4] != 0)) {
ptp_debug (params, "objectsize 64bit detected!");
params->ocs64 = 1;
data += 4;
len -= 4;
}
oi->ThumbFormat=dtoh16a(&data[PTP_oi_ThumbFormat]);
oi->ThumbCompressedSize=dtoh32a(&data[PTP_oi_ThumbCompressedSize]);
oi->ThumbPixWidth=dtoh32a(&data[PTP_oi_ThumbPixWidth]);
oi->ThumbPixHeight=dtoh32a(&data[PTP_oi_ThumbPixHeight]);
oi->ImagePixWidth=dtoh32a(&data[PTP_oi_ImagePixWidth]);
oi->ImagePixHeight=dtoh32a(&data[PTP_oi_ImagePixHeight]);
oi->ImageBitDepth=dtoh32a(&data[PTP_oi_ImageBitDepth]);
oi->ParentObject=dtoh32a(&data[PTP_oi_ParentObject]);
oi->AssociationType=dtoh16a(&data[PTP_oi_AssociationType]);
oi->AssociationDesc=dtoh32a(&data[PTP_oi_AssociationDesc]);
oi->SequenceNumber=dtoh32a(&data[PTP_oi_SequenceNumber]);
ptp_unpack_string(params, data, PTP_oi_filenamelen, len, &filenamelen, &oi->Filename);
ptp_unpack_string(params, data, PTP_oi_filenamelen+filenamelen*2+1, len, &capturedatelen, &capture_date);
/* subset of ISO 8601, without '.s' tenths of second and
* time zone
*/
oi->CaptureDate = ptp_unpack_PTPTIME(capture_date);
free(capture_date);
/* now the modification date ... */
ptp_unpack_string(params, data,
PTP_oi_filenamelen+filenamelen*2
+capturedatelen*2+2, len, &capturedatelen, &capture_date
);
oi->ModificationDate = ptp_unpack_PTPTIME(capture_date);
free(capture_date);
}
/* Custom Type Value Assignment (without Length) macro frequently used below */
#define CTVAL(target,func) { \
if (total - *offset < sizeof(target)) \
return 0; \
target = func(&data[*offset]); \
*offset += sizeof(target); \
}
#define RARR(val,member,func) { \
unsigned int n,j; \
if (total - *offset < sizeof(uint32_t)) \
return 0; \
n = dtoh32a (&data[*offset]); \
*offset += sizeof(uint32_t); \
\
if (n >= UINT_MAX/sizeof(val->a.v[0])) \
return 0; \
if (n > (total - (*offset))/sizeof(val->a.v[0].member))\
return 0; \
val->a.count = n; \
val->a.v = calloc(n, sizeof(val->a.v[0])); \
if (!val->a.v) return 0; \
for (j=0;j<n;j++) \
CTVAL(val->a.v[j].member, func); \
}
static inline unsigned int
ptp_unpack_DPV (
PTPParams *params, const unsigned char* data, unsigned int *offset, unsigned int total,
PTPPropertyValue* value, uint16_t datatype
) {
if (*offset >= total) /* we are at the end or over the end of the buffer */
return 0;
switch (datatype) {
case PTP_DTC_INT8:
CTVAL(value->i8,dtoh8a);
break;
case PTP_DTC_UINT8:
CTVAL(value->u8,dtoh8a);
break;
case PTP_DTC_INT16:
CTVAL(value->i16,dtoh16a);
break;
case PTP_DTC_UINT16:
CTVAL(value->u16,dtoh16a);
break;
case PTP_DTC_INT32:
CTVAL(value->i32,dtoh32a);
break;
case PTP_DTC_UINT32:
CTVAL(value->u32,dtoh32a);
break;
case PTP_DTC_INT64:
CTVAL(value->i64,dtoh64a);
break;
case PTP_DTC_UINT64:
CTVAL(value->u64,dtoh64a);
break;
case PTP_DTC_UINT128:
*offset += 16;
/*fprintf(stderr,"unhandled unpack of uint128n");*/
break;
case PTP_DTC_INT128:
*offset += 16;
/*fprintf(stderr,"unhandled unpack of int128n");*/
break;
case PTP_DTC_AINT8:
RARR(value,i8,dtoh8a);
break;
case PTP_DTC_AUINT8:
RARR(value,u8,dtoh8a);
break;
case PTP_DTC_AUINT16:
RARR(value,u16,dtoh16a);
break;
case PTP_DTC_AINT16:
RARR(value,i16,dtoh16a);
break;
case PTP_DTC_AUINT32:
RARR(value,u32,dtoh32a);
break;
case PTP_DTC_AINT32:
RARR(value,i32,dtoh32a);
break;
case PTP_DTC_AUINT64:
RARR(value,u64,dtoh64a);
break;
case PTP_DTC_AINT64:
RARR(value,i64,dtoh64a);
break;
/* XXX: other int types are unimplemented */
/* XXX: other int arrays are unimplemented also */
case PTP_DTC_STR: {
uint8_t len;
/* XXX: max size */
if (*offset >= total+1)
return 0;
if (!ptp_unpack_string(params,data,*offset,total,&len,&value->str))
return 0;
*offset += len*2+1;
break;
}
default:
return 0;
}
return 1;
}
/* Device Property pack/unpack */
#define PTP_dpd_DevicePropertyCode 0
#define PTP_dpd_DataType 2
#define PTP_dpd_GetSet 4
#define PTP_dpd_FactoryDefaultValue 5
static inline int
ptp_unpack_DPD (PTPParams *params, const unsigned char* data, PTPDevicePropDesc *dpd, unsigned int dpdlen, unsigned int *newoffset)
{
unsigned int offset = 0, ret;
*newoffset = 0;
memset (dpd, 0, sizeof(*dpd));
if (dpdlen <= 5)
return 0;
dpd->DevicePropertyCode=dtoh16a(&data[PTP_dpd_DevicePropertyCode]);
dpd->DataType=dtoh16a(&data[PTP_dpd_DataType]);
dpd->GetSet=dtoh8a(&data[PTP_dpd_GetSet]);
dpd->FormFlag=PTP_DPFF_None;
offset = PTP_dpd_FactoryDefaultValue;
ret = ptp_unpack_DPV (params, data, &offset, dpdlen, &dpd->FactoryDefaultValue, dpd->DataType);
if (!ret) goto outofmemory;
if ((dpd->DataType == PTP_DTC_STR) && (offset == dpdlen)) {
*newoffset = offset;
return 1;
}
ret = ptp_unpack_DPV (params, data, &offset, dpdlen, &dpd->CurrentValue, dpd->DataType);
if (!ret) goto outofmemory;
/* if offset==0 then Data Type format is not supported by this
code or the Data Type is a string (with two empty strings as
values). In both cases Form Flag should be set to 0x00 and FORM is
not present. */
if (offset + sizeof(uint8_t) > dpdlen) {
*newoffset = offset;
return 1;
}
dpd->FormFlag=dtoh8a(&data[offset]);
offset+=sizeof(uint8_t);
switch (dpd->FormFlag) {
case PTP_DPFF_Range:
ret = ptp_unpack_DPV (params, data, &offset, dpdlen, &dpd->FORM.Range.MinimumValue, dpd->DataType);
if (!ret) goto outofmemory;
ret = ptp_unpack_DPV (params, data, &offset, dpdlen, &dpd->FORM.Range.MaximumValue, dpd->DataType);
if (!ret) goto outofmemory;
ret = ptp_unpack_DPV (params, data, &offset, dpdlen, &dpd->FORM.Range.StepSize, dpd->DataType);
if (!ret) goto outofmemory;
break;
case PTP_DPFF_Enumeration: {
int i;
#define N dpd->FORM.Enum.NumberOfValues
if (offset + sizeof(uint16_t) > dpdlen) goto outofmemory;
N = dtoh16a(&data[offset]);
offset+=sizeof(uint16_t);
dpd->FORM.Enum.SupportedValue = calloc(N,sizeof(dpd->FORM.Enum.SupportedValue[0]));
if (!dpd->FORM.Enum.SupportedValue)
goto outofmemory;
for (i=0;i<N;i++) {
ret = ptp_unpack_DPV (params, data, &offset, dpdlen, &dpd->FORM.Enum.SupportedValue[i], dpd->DataType);
/* Slightly different handling here. The HP PhotoSmart 120
* specifies an enumeration with N in wrong endian
* 00 01 instead of 01 00, so we count the enum just until the
* the end of the packet.
*/
if (!ret) {