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// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* OBEX library with GLib integration
*
* Copyright (C) 2012 Intel Corporation.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include "gobex-apparam.h"
#include "gobex-debug.h"
struct _GObexApparam {
GHashTable *tags;
};
struct apparam_tag {
guint8 id;
guint8 len;
union {
/* Data is stored in network order */
char string[0];
guint8 data[0];
guint8 u8;
guint16 u16;
guint32 u32;
guint64 u64;
} value;
} __attribute__ ((packed));
static struct apparam_tag *tag_new(guint8 id, guint8 len, const void *data)
{
struct apparam_tag *tag;
tag = g_malloc0(2 + len);
tag->id = id;
tag->len = len;
memcpy(tag->value.data, data, len);
return tag;
}
static GObexApparam *g_obex_apparam_new(void)
{
GObexApparam *apparam;
apparam = g_new0(GObexApparam, 1);
apparam->tags = g_hash_table_new_full(g_direct_hash, g_direct_equal,
NULL, g_free);
return apparam;
}
static struct apparam_tag *apparam_tag_decode(const void *data, gsize size,
gsize *parsed)
{
struct apparam_tag *tag;
const guint8 *ptr = data;
guint8 id;
guint8 len;
if (size < 2)
return NULL;
id = ptr[0];
len = ptr[1];
if (len > size - 2)
return NULL;
tag = tag_new(id, len, ptr + 2);
if (tag == NULL)
return NULL;
*parsed = 2 + tag->len;
return tag;
}
GObexApparam *g_obex_apparam_decode(const void *data, gsize size)
{
GObexApparam *apparam;
GHashTable *tags;
gsize count = 0;
if (size < 2)
return NULL;
apparam = g_obex_apparam_new();
tags = apparam->tags;
while (count < size) {
struct apparam_tag *tag;
gsize parsed;
guint id;
tag = apparam_tag_decode(data + count, size - count, &parsed);
if (tag == NULL)
break;
id = tag->id;
g_hash_table_insert(tags, GUINT_TO_POINTER(id), tag);
count += parsed;
}
if (count != size) {
g_obex_apparam_free(apparam);
return NULL;
}
return apparam;
}
static gssize tag_encode(struct apparam_tag *tag, void *buf, gsize len)
{
gsize count = 2 + tag->len;
if (len < count)
return -ENOBUFS;
memcpy(buf, tag, count);
return count;
}
gssize g_obex_apparam_encode(GObexApparam *apparam, void *buf, gsize len)
{
gsize count = 0;
gssize ret;
GHashTableIter iter;
gpointer key, value;
if (!apparam)
return 0;
g_hash_table_iter_init(&iter, apparam->tags);
while (g_hash_table_iter_next(&iter, &key, &value)) {
struct apparam_tag *tag = value;
ret = tag_encode(tag, buf + count, len - count);
if (ret < 0)
return ret;
count += ret;
}
return count;
}
GObexApparam *g_obex_apparam_set_bytes(GObexApparam *apparam, guint8 id,
const void *value, gsize len)
{
struct apparam_tag *tag;
guint uid = id;
if (apparam == NULL)
apparam = g_obex_apparam_new();
tag = tag_new(id, len, value);
g_hash_table_replace(apparam->tags, GUINT_TO_POINTER(uid), tag);
return apparam;
}
GObexApparam *g_obex_apparam_set_uint8(GObexApparam *apparam, guint8 id,
guint8 value)
{
g_obex_debug(G_OBEX_DEBUG_APPARAM, "tag 0x%02x value %u", id, value);
return g_obex_apparam_set_bytes(apparam, id, &value, 1);
}
GObexApparam *g_obex_apparam_set_uint16(GObexApparam *apparam, guint8 id,
guint16 value)
{
guint16 num = g_htons(value);
g_obex_debug(G_OBEX_DEBUG_APPARAM, "tag 0x%02x value %u", id, value);
return g_obex_apparam_set_bytes(apparam, id, &num, 2);
}
GObexApparam *g_obex_apparam_set_uint32(GObexApparam *apparam, guint8 id,
guint32 value)
{
guint32 num = g_htonl(value);
g_obex_debug(G_OBEX_DEBUG_APPARAM, "tag 0x%02x value %u", id, value);
return g_obex_apparam_set_bytes(apparam, id, &num, 4);
}
GObexApparam *g_obex_apparam_set_uint64(GObexApparam *apparam, guint8 id,
guint64 value)
{
guint64 num = GUINT64_TO_BE(value);
g_obex_debug(G_OBEX_DEBUG_APPARAM, "tag 0x%02x value %"
G_GUINT64_FORMAT, id, value);
return g_obex_apparam_set_bytes(apparam, id, &num, 8);
}
GObexApparam *g_obex_apparam_set_string(GObexApparam *apparam, guint8 id,
const char *value)
{
gsize len;
g_obex_debug(G_OBEX_DEBUG_APPARAM, "tag 0x%02x value %s", id, value);
len = strlen(value) + 1;
if (len > G_MAXUINT8) {
((char *) value)[G_MAXUINT8 - 1] = '\0';
len = G_MAXUINT8;
}
return g_obex_apparam_set_bytes(apparam, id, value, len);
}
static struct apparam_tag *g_obex_apparam_find_tag(GObexApparam *apparam,
guint id)
{
return g_hash_table_lookup(apparam->tags, GUINT_TO_POINTER(id));
}
gboolean g_obex_apparam_get_uint8(GObexApparam *apparam, guint8 id,
guint8 *dest)
{
struct apparam_tag *tag;
g_obex_debug(G_OBEX_DEBUG_APPARAM, "tag 0x%02x", id);
tag = g_obex_apparam_find_tag(apparam, id);
if (tag == NULL)
return FALSE;
*dest = tag->value.u8;
g_obex_debug(G_OBEX_DEBUG_APPARAM, "%u", *dest);
return TRUE;
}
gboolean g_obex_apparam_get_uint16(GObexApparam *apparam, guint8 id,
guint16 *dest)
{
struct apparam_tag *tag;
g_obex_debug(G_OBEX_DEBUG_APPARAM, "tag 0x%02x", id);
tag = g_obex_apparam_find_tag(apparam, id);
if (tag == NULL)
return FALSE;
if (tag->len < sizeof(*dest))
return FALSE;
*dest = g_ntohs(tag->value.u16);
g_obex_debug(G_OBEX_DEBUG_APPARAM, "%u", *dest);
return TRUE;
}
gboolean g_obex_apparam_get_uint32(GObexApparam *apparam, guint8 id,
guint32 *dest)
{
struct apparam_tag *tag;
g_obex_debug(G_OBEX_DEBUG_APPARAM, "tag 0x%02x", id);
tag = g_obex_apparam_find_tag(apparam, id);
if (tag == NULL)
return FALSE;
if (tag->len < sizeof(*dest))
return FALSE;
*dest = g_ntohl(tag->value.u32);
g_obex_debug(G_OBEX_DEBUG_APPARAM, "%u", *dest);
return TRUE;
}
gboolean g_obex_apparam_get_uint64(GObexApparam *apparam, guint8 id,
guint64 *dest)
{
struct apparam_tag *tag;
g_obex_debug(G_OBEX_DEBUG_APPARAM, "tag 0x%02x", id);
tag = g_obex_apparam_find_tag(apparam, id);
if (tag == NULL)
return FALSE;
if (tag->len < sizeof(*dest))
return FALSE;
*dest = GUINT64_FROM_BE(tag->value.u64);
g_obex_debug(G_OBEX_DEBUG_APPARAM, "%" G_GUINT64_FORMAT, *dest);
return TRUE;
}
char *g_obex_apparam_get_string(GObexApparam *apparam, guint8 id)
{
struct apparam_tag *tag;
char *string;
g_obex_debug(G_OBEX_DEBUG_APPARAM, "tag 0x%02x", id);
tag = g_obex_apparam_find_tag(apparam, id);
if (tag == NULL)
return NULL;
string = g_strndup(tag->value.string, tag->len);
g_obex_debug(G_OBEX_DEBUG_APPARAM, "%s", string);
return string;
}
gboolean g_obex_apparam_get_bytes(GObexApparam *apparam, guint8 id,
const guint8 **val, gsize *len)
{
struct apparam_tag *tag;
g_obex_debug(G_OBEX_DEBUG_APPARAM, "tag 0x%02x", id);
tag = g_obex_apparam_find_tag(apparam, id);
if (tag == NULL)
return FALSE;
*len = tag->len;
*val = tag->value.data;
return TRUE;
}
void g_obex_apparam_free(GObexApparam *apparam)
{
g_hash_table_unref(apparam->tags);
g_free(apparam);
}
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