According to the MMS encoding spec, this field should be a "Long-integer". The encoding for this is defined in WAP-203-WSP Section 8.1.2:
8.1.2 Variable Length Unsigned Integers Many fields in the data unit formats are of variable length. Typically, there will be an associated field that specifies the size of the variable length field. In order to keep the data unit formats as small as possible, a variable length unsigned integer encoding is used to specify lengths. The larger the unsigned integer, the larger the size of its encoding. Each octet of the variable length unsigned integer is comprised of a single Continue bit and 7 bits of payload as shown in Figure 27. To encode a large unsigned integer, split it into 7-bit fragments and place them in the payloads of multiple octets. The most significant bits are placed in the first octets with the least significant bits ending up in the last octet. All octets MUST set the Continue bit to 1 except the last octet, which MUST set the Continue bit to 0. On Aug 28, 2010, at 00:29, Rennard Hutchinson wrote: > Hello, > > I was wondering if anyone could help me with the X-Mms-Message-Size field. I > have looked over the mms encapsulation spec an it indicates that this value > is a Long-integer. I have also seen some other places, like wireshark > decoders, that list this as a 32 bit unsigned integer. Yet another method > seems to use and encoding of 0x8E(for the field name), lengthInBytes(lets say > 2), 0xXX(first byte), 0xYY(second byte). > > My problem is that in wireshark traces from notifications being generated by > Mbuni, this field doesn't seem to follow any of these encodings routinely. > > If it is using a 32bit encoding I would expect to see 4 bytes for the size in > each message. Sometimes it is 3, sometimes 2. > > How is Mbuni setting this field? > _______________________________________________ > Users mailing list > Users@mbuni.org > http://lists.mbuni.org/mailman/listinfo/users > _______________________________________________ Users mailing list Users@mbuni.org http://lists.mbuni.org/mailman/listinfo/users
