pcapng: expand a comment and tweak the version test.
Drop in the comment from libpcap about version 1.2 (I wrote that comment, and generously double-license it under the BSD license and the GPL :-)). Redo the version test as if (!({version is one we handle})) to match the way it's done in libpcap.
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@ -772,8 +772,22 @@ pcapng_read_section_header_block(FILE_T fh, pcapng_block_header_t *bh,
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return PCAPNG_BLOCK_ERROR;
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}
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/* we currently only understand SHB V1.0 SHB V1.2*/
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if (version_major != 1 || version_minor == 1 || version_minor > 2) {
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/* Currently only SHB versions 1.0 and 1.2 are supported;
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version 1.2 is treated as being the same as version 1.0.
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See the current version of the pcapng specification.
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Version 1.2 is written by some programs that write additional
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block types (which can be read by any code that handles them,
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regarless of whether the minor version if 0 or 2, so that's
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not a reason to change the minor version number).
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XXX - the pcapng specification says that readers should
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just ignore sections with an unsupported version number;
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presumably they can also report an error if they skip
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all the way to the end of the file without finding
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any versions that they support. */
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if (!(version_major == 1 &&
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(version_minor == 0 || version_minor == 2))) {
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*err = WTAP_ERR_UNSUPPORTED;
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*err_info = g_strdup_printf("pcapng_read_section_header_block: unknown SHB version %u.%u",
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version_major, version_minor);
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