serval-dna/dataformats.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 "rhizome.h"
#include "str.h"
#include <ctype.h>

int cmp_sid_t(const sid_t *a, const sid_t *b)
{
  return memcmp(a, b, sizeof a->binary);
}

int str_to_sid_t(sid_t *sid, const char *hex)
{
  if (strcmp(hex, "broadcast") == 0) {
    *sid = SID_BROADCAST;
    return 0;
  }
  return fromhexstr(sid->binary, hex, sizeof sid->binary);
}

int strn_to_sid_t(sid_t *sid, const char *hex, const char **endp)
{
  if (str_startswith(hex, "broadcast", endp) == 0) {
    *sid = SID_BROADCAST;
    return 0;
  }
  sid_t tmp;
  int n = fromhex(tmp.binary, hex, sizeof tmp.binary);
  if (n != sizeof tmp.binary)
    return -1;
  *sid = tmp;
  if (endp)
    *endp = hex + sizeof sid->binary * 2;
  return 0;
}

int str_is_subscriber_id(const char *sid)
{
  size_t len = 0;
  return strn_is_subscriber_id(sid, &len) && sid[len] == '\0';
}

int strn_is_subscriber_id(const char *sid, size_t *lenp)
{
  if (strncasecmp(sid, "broadcast", 9) == 0) {
    if (lenp)
      *lenp = 9;
    return 1;
  }
  if (is_xsubstring(sid, SID_STRLEN)) {
    if (lenp)
      *lenp = SID_STRLEN;
    return 1;
  }
  return 0;
}

int rhizome_strn_is_manifest_id(const char *id)
{
  return is_xsubstring(id, RHIZOME_MANIFEST_ID_STRLEN);
}

int rhizome_str_is_manifest_id(const char *id)
{
  return is_xstring(id, RHIZOME_MANIFEST_ID_STRLEN);
}

int rhizome_strn_is_bundle_key(const char *key)
{
  return is_xsubstring(key, RHIZOME_BUNDLE_KEY_STRLEN);
}

int rhizome_str_is_bundle_key(const char *key)
{
  return is_xstring(key, RHIZOME_BUNDLE_KEY_STRLEN);
}

int rhizome_strn_is_bundle_crypt_key(const char *key)
{
  return is_xsubstring(key, RHIZOME_CRYPT_KEY_STRLEN);
}

int rhizome_str_is_bundle_crypt_key(const char *key)
{
  return is_xstring(key, RHIZOME_CRYPT_KEY_STRLEN);
}

int rhizome_strn_is_file_hash(const char *hash)
{
  return is_xsubstring(hash, RHIZOME_FILEHASH_STRLEN);
}

int rhizome_str_is_file_hash(const char *hash)
{
  return is_xstring(hash, RHIZOME_FILEHASH_STRLEN);
}

int str_is_did(const char *did)
{
  size_t len = 0;
  return strn_is_did(did, &len) && did[len] == '\0';
}

int is_didchar(char c)
{
  return isdigit(c) || c == '*' || c == '#' || c == '+';
}

int strn_is_did(const char *did, size_t *lenp)
{
  int i;
  for (i = 0; i < DID_MAXSIZE && is_didchar(did[i]); ++i)
    ;
  if (i < DID_MINSIZE)
    return 0;
  if (lenp)
    *lenp = i;
  return 1;
}

void write_uint64(unsigned char *o,uint64_t v)
{
  int i;
  for(i=0;i<8;i++)
  { *(o++)=v&0xff; v=v>>8; }
}

void write_uint32(unsigned char *o,uint32_t v)
{
  int i;
  for(i=0;i<4;i++)
  { *(o++)=v&0xff; v=v>>8; }
}

void write_uint16(unsigned char *o,uint16_t v)
{
  int i;
  for(i=0;i<2;i++)
  { *(o++)=v&0xff; v=v>>8; }
}

uint64_t read_uint64(unsigned char *o)
{
  int i;
  uint64_t v=0;
  for(i=0;i<8;i++) v=(v<<8)|o[8-1-i];
  return v;
}

uint32_t read_uint32(unsigned char *o)
{
  int i;
  uint32_t v=0;
  for(i=0;i<4;i++) v=(v<<8)|o[4-1-i];
  return v;
}

uint16_t read_uint16(unsigned char *o)
{
  int i;
  uint16_t v=0;
  for(i=0;i<2;i++) v=(v<<8)|o[2-1-i];
  return v;
}