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/* $Id$ */
/*
* (C) Copyright 2012 Tomek Wasilczyk <www.wasilczyk.pl>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License Version
* 2.1 as published by the Free Software Foundation.
*
* This program 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 program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
* USA.
*/
/**
* \file protobuf.c
*
* \brief Funkcje pomocnicze do obsługi formatu protocol buffers
*/
#include "protobuf.h"
#define GG_PROTOBUFF_UIN_MAXLEN 15
struct _gg_protobuf_uin_buff
{
char data[GG_PROTOBUFF_UIN_MAXLEN + 1 + 2];
};
void gg_protobuf_expected(struct gg_session *gs, const char *field_name,
uint32_t value, uint32_t expected)
{
if (value == expected) {
return;
}
gg_debug_session(gs, GG_DEBUG_WARNING, "// gg_packet: field %s was "
"expected to be %#x, but its value was %#x\n",
field_name, expected, value);
}
int gg_protobuf_valid_chknull(struct gg_session *gs, const char *msg_name,
int isNull)
{
if (isNull) {
gg_debug_session(gs, GG_DEBUG_ERROR, "// gg_protobuf: couldn't "
"unpack %s message\n", msg_name);
}
return !isNull;
}
int gg_protobuf_valid_chkunknown(struct gg_session *gs, const char *msg_name,
ProtobufCMessage *base)
{
if (base->n_unknown_fields > 0) {
gg_debug_session(gs, GG_DEBUG_WARNING, "// gg_protobuf: message"
" %s had %d unknown field(s)\n",
msg_name, base->n_unknown_fields);
}
return 1;
}
int gg_protobuf_send_ex(struct gg_session *gs, struct gg_event *ge, int type,
void *msg, gg_protobuf_size_cb_t size_cb,
gg_protobuf_pack_cb_t pack_cb)
{
void *buffer;
size_t len;
int succ = 1;
enum gg_failure_t failure;
len = size_cb(msg);
buffer = malloc(len);
if (buffer == NULL) {
gg_debug_session(gs, GG_DEBUG_ERROR, "// gg_protobuf_send: out "
"of memory - tried to allocate %" GG_SIZE_FMT
" bytes for %#x packet\n", len, type);
succ = 0;
failure = GG_FAILURE_INTERNAL;
} else {
pack_cb(msg, buffer);
succ = (-1 != gg_send_packet(gs, type, buffer, len, NULL));
free(buffer);
buffer = NULL;
if (!succ) {
failure = GG_FAILURE_WRITING;
gg_debug_session(gs, GG_DEBUG_ERROR,
"// gg_protobuf_send: sending packet %#x "
"failed. (errno=%d, %s)\n", type, errno,
strerror(errno));
}
}
if (!succ) {
gg_connection_failure(gs, ge, failure);
}
return succ;
}
void gg_protobuf_set_uin(ProtobufCBinaryData *dst, uin_t uin, gg_protobuf_uin_buff_t *buff)
{
char *uin_str;
int uin_len;
static gg_protobuf_uin_buff_t static_buffer;
if (buff == NULL) {
buff = &static_buffer;
}
uin_str = buff->data + 2;
uin_len = snprintf(uin_str, GG_PROTOBUFF_UIN_MAXLEN + 1, "%u", uin);
buff->data[0] = 0x01; /* magic: 0x00 lub 0x01 */
buff->data[1] = uin_len;
dst->len = uin_len + 2;
dst->data = (uint8_t*)&buff->data;
}
uin_t gg_protobuf_get_uin(ProtobufCBinaryData uin_data)
{
uint8_t magic;
size_t uin_len;
const char *uin_str;
uin_t uin;
magic = (uin_data.len > 0) ? uin_data.data[0] : 0;
uin_len = (uin_data.len > 1) ? uin_data.data[1] : 0;
if (uin_data.len != uin_len + 2 || uin_len > 10) {
gg_debug(GG_DEBUG_ERROR, "// gg_protobuf_get_uin: "
"invalid length\n");
return 0;
}
if (magic != 0) {
gg_debug(GG_DEBUG_WARNING, "// gg_protobuf_get_uin: "
"unexpected magic value=%#x\n", magic);
}
uin_str = (char*)(uin_data.data + 2);
uin = gg_str_to_uin(uin_str, uin_len);
if (uin == 0) {
gg_debug(GG_DEBUG_ERROR, "// gg_protobuf_get_uin: "
"invalid uin\n");
}
return uin;
}
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