serval-dna/packetformats.c

/* 
Serval Distributed Numbering Architecture (DNA)
Copyright (C) 2010 Paul Gardner-Stephen 

This program 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 2
of the License, or (at your option) any later version.

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
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/

#include "serval.h"
#include "str.h"

int stowSid(unsigned char *packet, int ofs, const char *sid)
{
  if (debug & DEBUG_PACKETFORMATS)
    printf("stowing SID \"%s\"\n", sid);
  if (strcasecmp(sid,"broadcast") == 0)
    memset(packet + ofs, 0xff, SID_SIZE);
  else if (fromhex(packet + ofs, sid, SID_SIZE) != SID_SIZE || sid[SID_STRLEN] != '\0')
    return WHY("invalid SID");
  return 0;
}