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/*
* This file is part of GNUnet
* (C) 2013 Christian Grothoff (and other contributing authors)
*
* GNUnet is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation; either version 3, or (at your
* option) any later version.
*
* GNUnet 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNUnet; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* @file psyc/psyc_common.c
* @brief Common functions for PSYC
* @author Gabor X Toth
*/
#include <inttypes.h>
#include "psyc.h"
/**
* Check if @a data contains a series of valid message parts.
*
* @param data_size Size of @a data.
* @param data Data.
* @param[out] first_ptype Type of first message part.
* @param[out] last_ptype Type of last message part.
*
* @return Number of message parts found in @a data.
* or GNUNET_SYSERR if the message contains invalid parts.
*/
int
GNUNET_PSYC_check_message_parts (uint16_t data_size, const char *data,
uint16_t *first_ptype, uint16_t *last_ptype)
{
const struct GNUNET_MessageHeader *pmsg;
uint16_t parts = 0, ptype = 0, psize = 0, pos = 0;
if (NULL != first_ptype)
*first_ptype = 0;
if (NULL != last_ptype)
*last_ptype = 0;
for (pos = 0; pos < data_size; pos += psize, parts++)
{
pmsg = (const struct GNUNET_MessageHeader *) (data + pos);
psize = ntohs (pmsg->size);
ptype = ntohs (pmsg->type);
if (0 == parts && NULL != first_ptype)
*first_ptype = ptype;
if (NULL != last_ptype
&& *last_ptype < GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_END)
*last_ptype = ptype;
if (psize < sizeof (*pmsg)
|| pos + psize > data_size
|| ptype < GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_METHOD
|| GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_CANCEL < ptype)
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
"Invalid message part of type %u and size %u.\n",
ptype, psize);
return GNUNET_SYSERR;
}
/* FIXME: check message part order */
}
return parts;
}
void
GNUNET_PSYC_log_message (enum GNUNET_ErrorType kind,
const struct GNUNET_MessageHeader *msg)
{
uint16_t size = ntohs (msg->size);
uint16_t type = ntohs (msg->type);
GNUNET_log (kind, "Message of type %d and size %u:\n", type, size);
switch (type)
{
case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE:
{
struct GNUNET_PSYC_MessageHeader *pmsg
= (struct GNUNET_PSYC_MessageHeader *) msg;
GNUNET_log (kind, "\tID: %" PRIu64 "\tflags: %x" PRIu32 "\n",
GNUNET_ntohll (pmsg->message_id), ntohl (pmsg->flags));
break;
}
case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_METHOD:
{
struct GNUNET_PSYC_MessageMethod *meth
= (struct GNUNET_PSYC_MessageMethod *) msg;
GNUNET_log (kind, "\t%.*s\n", size - sizeof (*meth), &meth[1]);
break;
}
case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MODIFIER:
{
struct GNUNET_PSYC_MessageModifier *mod
= (struct GNUNET_PSYC_MessageModifier *) msg;
uint16_t name_size = ntohs (mod->name_size);
char oper = ' ' < mod->oper ? mod->oper : ' ';
GNUNET_log (kind, "\t%c%.*s\t%.*s\n", oper, name_size, &mod[1],
size - sizeof (*mod) - name_size - 1,
((char *) &mod[1]) + name_size + 1);
break;
}
case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MOD_CONT:
case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_DATA:
GNUNET_log (kind, "\t%.*s\n", size - sizeof (*msg), &msg[1]);
break;
}
}
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