/*
* status = ipv6routingioPrepare(stream);
*
* Sets the record version to the default if it is unspecified,
* checks that the record format supports the requested record
* version, sets the record length, and sets the pack and unpack
* functions for this record format and version.
*/
int
ipv6routingioPrepare(
skstream_t *stream)
{
#define FILE_FORMAT "FT_RWIPV6ROUTING"
sk_file_header_t *hdr = stream->silk_hdr;
int rv = SKSTREAM_OK; /* return value */
/* Set version if none was selected by caller */
if ((stream->io_mode == SK_IO_WRITE)
&& (skHeaderGetRecordVersion(hdr) == SK_RECORD_VERSION_ANY))
{
skHeaderSetRecordVersion(hdr, DEFAULT_RECORD_VERSION);
}
/* version check; set values based on version */
switch (skHeaderGetRecordVersion(hdr)) {
case 3:
stream->rwUnpackFn = &ipv6routingioRecordUnpack_V3;
stream->rwPackFn = &ipv6routingioRecordPack_V3;
break;
case 2:
stream->rwUnpackFn = &ipv6routingioRecordUnpack_V2;
stream->rwPackFn = &ipv6routingioRecordPack_V1;
break;
case 1:
stream->rwUnpackFn = &ipv6routingioRecordUnpack_V1;
stream->rwPackFn = &ipv6routingioRecordPack_V1;
break;
case 0:
default:
rv = SKSTREAM_ERR_UNSUPPORT_VERSION;
goto END;
}
stream->recLen = ipv6routingioGetRecLen(skHeaderGetRecordVersion(hdr));
/* verify lengths */
if (stream->recLen == 0) {
skAppPrintErr("Record length not set for %s version %u",
FILE_FORMAT, (unsigned)skHeaderGetRecordVersion(hdr));
skAbort();
}
if (stream->recLen != skHeaderGetRecordLength(hdr)) {
if (0 == skHeaderGetRecordLength(hdr)) {
skHeaderSetRecordLength(hdr, stream->recLen);
} else {
skAppPrintErr(("Record length mismatch for %s version %u\n"
"\tcode = %" PRIu16 " bytes; header = %lu bytes"),
FILE_FORMAT, (unsigned)skHeaderGetRecordVersion(hdr),
stream->recLen,
(unsigned long)skHeaderGetRecordLength(hdr));
skAbort();
}
}
END:
return rv;
}
/*
* status = augsnmpoutioPrepare(&stream);
*
* Sets the record version to the default if it is unspecified,
* checks that the record format supports the requested record
* version, sets the record length, and sets the pack and unpack
* functions for this record format and version.
*/
int
augsnmpoutioPrepare(
skstream_t *stream)
{
#define FILE_FORMAT "FT_RWAUGSNMPOUT"
sk_file_header_t *hdr = stream->silk_hdr;
int rv = SKSTREAM_OK; /* return value */
assert(skHeaderGetFileFormat(hdr) == FT_RWAUGSNMPOUT);
/* Set version if none was selected by caller */
if ((stream->io_mode == SK_IO_WRITE)
&& (skHeaderGetRecordVersion(hdr) == SK_RECORD_VERSION_ANY))
{
skHeaderSetRecordVersion(hdr, DEFAULT_RECORD_VERSION);
}
/* version check; set values based on version */
switch (skHeaderGetRecordVersion(hdr)) {
case 5:
stream->rwUnpackFn = &augsnmpoutioRecordUnpack_V5;
stream->rwPackFn = &augsnmpoutioRecordPack_V5;
break;
case 4:
stream->rwUnpackFn = &augsnmpoutioRecordUnpack_V4;
stream->rwPackFn = &augsnmpoutioRecordPack_V4;
break;
case 3:
case 2:
case 1:
/* V1 and V2 differ only in the padding of the header */
/* V2 and V3 differ only in that V3 supports compression on
* read and write; V2 supports compression only on read */
stream->rwUnpackFn = &augsnmpoutioRecordUnpack_V1;
stream->rwPackFn = &augsnmpoutioRecordPack_V1;
break;
case 0:
default:
rv = SKSTREAM_ERR_UNSUPPORT_VERSION;
goto END;
}
stream->recLen = augsnmpoutioGetRecLen(skHeaderGetRecordVersion(hdr));
/* verify lengths */
if (stream->recLen == 0) {
skAppPrintErr("Record length not set for %s version %u",
FILE_FORMAT, (unsigned)skHeaderGetRecordVersion(hdr));
skAbort();
}
if (stream->recLen != skHeaderGetRecordLength(hdr)) {
if (0 == skHeaderGetRecordLength(hdr)) {
skHeaderSetRecordLength(hdr, stream->recLen);
} else {
skAppPrintErr(("Record length mismatch for %s version %u\n"
"\tcode = %" PRIu16 " bytes; header = %lu bytes"),
FILE_FORMAT, (unsigned)skHeaderGetRecordVersion(hdr),
stream->recLen,
(unsigned long)skHeaderGetRecordLength(hdr));
skAbort();
}
}
END:
return rv;
}
/*
* status = genericioPrepare(&rwIOSPtr);
*
* Sets the record version to the default if it is unspecified,
* checks that the record format supports the requested record
* version, sets the record length, and sets the pack and unpack
* functions for this record format and version.
*/
int
genericioPrepare(
skstream_t *rwIOS)
{
#define FILE_FORMAT "FT_RWGENERIC"
sk_file_header_t *hdr = rwIOS->silk_hdr;
int rv = SKSTREAM_OK; /* return value */
assert(skHeaderGetFileFormat(hdr) == FT_RWGENERIC);
/* Set version if none was selected by caller */
if ((rwIOS->io_mode == SK_IO_WRITE)
&& (skHeaderGetRecordVersion(hdr) == SK_RECORD_VERSION_ANY))
{
skHeaderSetRecordVersion(hdr, DEFAULT_RECORD_VERSION);
}
/* version check; set values based on version */
switch (skHeaderGetRecordVersion(hdr)) {
case 5:
rwIOS->rwUnpackFn = &genericioRecordUnpack_V5;
rwIOS->rwPackFn = &genericioRecordPack_V5;
break;
case 4:
case 3:
/* V3 and V4 differ only in that V4 supports compression on
* read and write; V3 supports compression only on read */
rwIOS->rwUnpackFn = &genericioRecordUnpack_V3;
rwIOS->rwPackFn = &genericioRecordPack_V3;
break;
case 2:
rwIOS->rwUnpackFn = &genericioRecordUnpack_V2;
rwIOS->rwPackFn = &genericioRecordPack_V2;
break;
case 1:
case 0:
/* Version 0 and Version 1 records are nearly the same; the
* on-disk Version 0 records included the 3 bytes of in-core
* padding; the on-disk Version 1 records do not include these
* 3 bytes. */
rwIOS->rwUnpackFn = &genericioRecordUnpack_V1;
rwIOS->rwPackFn = &genericioRecordPack_V1;
break;
default:
rv = SKSTREAM_ERR_UNSUPPORT_VERSION;
goto END;
}
rwIOS->recLen = genericioGetRecLen(skHeaderGetRecordVersion(hdr));
/* verify lengths */
if (rwIOS->recLen == 0) {
skAppPrintErr("Record length not set for %s version %u",
FILE_FORMAT, (unsigned)skHeaderGetRecordVersion(hdr));
skAbort();
}
if (rwIOS->recLen != skHeaderGetRecordLength(hdr)) {
if (0 == skHeaderGetRecordLength(hdr)) {
skHeaderSetRecordLength(hdr, rwIOS->recLen);
} else {
skAppPrintErr(("Record length mismatch for %s version %u\n"
"\tcode = %" PRIu16 " bytes; header = %lu bytes"),
FILE_FORMAT, (unsigned)skHeaderGetRecordVersion(hdr),
rwIOS->recLen,
(unsigned long)skHeaderGetRecordLength(hdr));
skAbort();
}
}
END:
return rv;
}
