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wireless: fixup genregdb.awk for remove of antenna gain from wireless-regd
Since "wireless-regdb: remove antenna gain" was merged in the wireless-regdb tree, the awk script parser has been incompatible with the 'official' regulatory database. This fixes that up. Without this change the max EIRP is set to 0 making 802.11 devices useless. The fragile nature of the awk parser must be replaced, but ideas over how to do that in the most scalable way are being reviewed. In the meantime update the documentation for CFG80211_INTERNAL_REGDB so folks are aware of expectations for now. Reported-by: John Walker <john@x109.net> Reported-by: Krishna Chaitanya <chaitanya.mgit@gmail.com> Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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@ -162,6 +162,12 @@ config CFG80211_INTERNAL_REGDB
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and includes code to query that database. This is an alternative
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to using CRDA for defining regulatory rules for the kernel.
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Using this option requires some parsing of the db.txt at build time,
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the parser will be upkept with the latest wireless-regdb updates but
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older wireless-regdb formats will be ignored. The parser may later
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be replaced to avoid issues with conflicts on versions of
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wireless-regdb.
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For details see:
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http://wireless.kernel.org/en/developers/Regulatory
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@ -51,32 +51,41 @@ function parse_country_head() {
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function parse_reg_rule()
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{
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flag_starts_at = 7
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start = $1
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sub(/\(/, "", start)
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end = $3
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bw = $5
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sub(/\),/, "", bw)
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gain = $6
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sub(/\(/, "", gain)
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sub(/,/, "", gain)
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power = $7
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sub(/\)/, "", power)
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sub(/,/, "", power)
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gain = 0
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power = $6
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# power might be in mW...
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units = $8
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units = $7
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dfs_cac = 0
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sub(/\(/, "", power)
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sub(/\),/, "", power)
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sub(/\),/, "", units)
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sub(/\)/, "", units)
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sub(/,/, "", units)
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dfs_cac = $9
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if (units == "mW") {
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flag_starts_at = 8
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power = 10 * log(power)/log(10)
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if ($8 ~ /[[:digit:]]/) {
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flag_starts_at = 9
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dfs_cac = $8
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}
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} else {
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dfs_cac = $8
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if ($7 ~ /[[:digit:]]/) {
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flag_starts_at = 8
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dfs_cac = $7
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}
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}
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sub(/,/, "", dfs_cac)
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sub(/\(/, "", dfs_cac)
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sub(/\)/, "", dfs_cac)
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sub(/\),/, "", dfs_cac)
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flagstr = ""
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for (i=8; i<=NF; i++)
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for (i=flag_starts_at; i<=NF; i++)
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flagstr = flagstr $i
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split(flagstr, flagarray, ",")
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flags = ""
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