diff options
Diffstat (limited to 'epan/tvbuff.c')
| -rw-r--r-- | epan/tvbuff.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/epan/tvbuff.c b/epan/tvbuff.c index 81502d2531..97e60b564d 100644 --- a/epan/tvbuff.c +++ b/epan/tvbuff.c @@ -4563,6 +4563,29 @@ tvb_get_varint(tvbuff_t *tvb, guint offset, guint maxlen, guint64 *value, const break; } + case ENC_VARINT_SDNV: + { + /* Decodes similar to protobuf but in MSByte order */ + guint i; + guint64 b; /* current byte */ + + for (i = 0; ((i < FT_VARINT_MAX_LEN) && (i < maxlen)); ++i) { + b = tvb_get_guint8(tvb, offset++); + if ((i == 9) && (*value >= 1ul<<(64-7))) { + // guaranteed overflow, not valid SDNV + return 0; + } + *value <<= 7; + *value |= (b & 0x7F); /* add lower 7 bits to val */ + + if (b < 0x80) { + /* end successfully because of last byte's msb(most significant bit) is zero */ + return i + 1; + } + } + break; + } + case ENC_VARINT_QUIC: { /* calculate variable length */ |