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for #250, calc and verify the crc32 of PAT.

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This commit is contained in:
winlin 2015-01-27 17:04:30 +08:00
parent 52b62918d9
commit 7692e50fc2
4 changed files with 100 additions and 3 deletions
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16
trunk/src/kernel/srs_kernel_ts.cpp
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@ -617,7 +617,7 @@ int SrsTsAdaptationField::decode(SrsStream* stream)
}
char* pp = NULL;
char* p = stream->data();
char* p = stream->data() + stream->pos();
stream->skip(6);
pp = (char*)&program_clock_reference_base;
@ -642,7 +642,7 @@ int SrsTsAdaptationField::decode(SrsStream* stream)
}
char* pp = NULL;
char* p = stream->data();
char* p = stream->data() + stream->pos();
stream->skip(6);
pp = (char*)&original_program_clock_reference_base;
@ -831,6 +831,10 @@ int SrsTsPayloadPAT::decode(SrsStream* stream)
return ret;
}
// to calc the crc32
char* ppat = stream->data() + stream->pos();
int pat_pos = stream->pos();
// atleast 8B without programs and crc32
if (!stream->require(8)) {
ret = ERROR_STREAM_CASTER_TS_AF;
@ -894,7 +898,13 @@ int SrsTsPayloadPAT::decode(SrsStream* stream)
}
CRC_32 = stream->read_4bytes();
// TODO: FIXME: verfy crc32.
// verify crc32.
int32_t crc32 = srs_crc32(ppat, stream->pos() - pat_pos - 4);
if (crc32 != CRC_32) {
ret = ERROR_STREAM_CASTER_TS_CRC32;
srs_error("ts: verify PAT crc32 failed. ret=%d", ret);
return ret;
}
return ret;
}