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/* Copyright (C) 2007-2010 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \file
*
* \author Gurvinder Singh <gurvindersinghdahiya@gmail.com>
*
* File to provide the protocol names based on protocol numbers defined in the
* specified protocol file.
*/
#include "suricata-common.h"
#include "util-proto-name.h"
/**
* \brief Function to load the protocol names from the specified protocol
* file.
*/
void SCProtoNameInit()
{
/* Load the known protocols name from the /etc/protocols file */
FILE *fp = fopen(PROTO_FILE,"r");
if (fp != NULL) {
char line[200];
#if !defined(__WIN32) && !defined(_WIN32)
char *ptr = NULL;
#endif /* __WIN32 */
while(fgets(line, sizeof(line), fp) != NULL) {
if (line[0] == '#')
continue;
#if defined(__WIN32) || defined(_WIN32)
char *name = strtok(line," \t");
#else
char *name = strtok_r(line," \t", &ptr);
#endif /* __WIN32 */
if (name == NULL)
continue;
#if defined(__WIN32) || defined(_WIN32)
char *proto_ch = strtok(NULL," \t");
#else
char *proto_ch = strtok_r(NULL," \t", &ptr);
#endif /* __WIN32 */
if (proto_ch == NULL)
continue;
int proto = atoi(proto_ch);
if (proto >= 255)
continue;
#if defined(__WIN32) || defined(_WIN32)
char *cname = strtok(NULL, " \t");
#else
char *cname = strtok_r(NULL, " \t", &ptr);
#endif /* __WIN32 */
if (cname != NULL) {
known_proto[proto] = SCStrdup(cname);
} else {
known_proto[proto] = SCStrdup(name);
}
}
fclose(fp);
}
}
/**
* \brief Function to check if the received protocol number is valid and do
* we have corresponding name entry for this number or not.
*
* \param proto Protocol number to be validated
* \retval ret On success returns TRUE otherwise FALSE
*/
uint8_t SCProtoNameValid(uint16_t proto)
{
uint8_t ret = FALSE;
if (proto <= 255 && known_proto[proto] != NULL) {
ret = TRUE;
}
return ret;
}
/**
* \brief Function to clears the memory used in storing the protocol names.
*/
void SCProtoNameDeInit()
{
/* clears the memory of loaded protocol names */
for (uint8_t cnt=0;cnt < 255;cnt++) {
if(known_proto[cnt] != NULL)
SCFree(known_proto[cnt]);
}
}
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