linux/net/wireless/genregdb.awk
John W. Linville 3b377ea9d4 wireless: support internal statically compiled regulatory database
This patch provides infrastructure for machine translation of the
regulatory rules database used by CRDA into a C data structure.
It includes code for searching that database as an alternative
to dynamic regulatory rules updates via CRDA.  Most people should
use CRDA instead of this infrastructure, but it provides a better
alternative than the WIRELESS_OLD_REGULATORY infrastructure (which
can now be removed).

Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-12-21 18:56:10 -05:00

119 lines
2.8 KiB
Awk

#!/usr/bin/awk -f
#
# genregdb.awk -- generate regdb.c from db.txt
#
# Actually, it reads from stdin (presumed to be db.txt) and writes
# to stdout (presumed to be regdb.c), but close enough...
#
# Copyright 2009 John W. Linville <linville@tuxdriver.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
BEGIN {
active = 0
rules = 0;
print "/*"
print " * DO NOT EDIT -- file generated from data in db.txt"
print " */"
print ""
print "#include <linux/nl80211.h>"
print "#include <net/cfg80211.h>"
print ""
regdb = "const struct ieee80211_regdomain *reg_regdb[] = {\n"
}
/^[ \t]*#/ {
/* Ignore */
}
!active && /^[ \t]*$/ {
/* Ignore */
}
!active && /country/ {
country=$2
sub(/:/, "", country)
printf "static const struct ieee80211_regdomain regdom_%s = {\n", country
printf "\t.alpha2 = \"%s\",\n", country
printf "\t.reg_rules = {\n"
active = 1
regdb = regdb "\t&regdom_" country ",\n"
}
active && /^[ \t]*\(/ {
start = $1
sub(/\(/, "", start)
end = $3
bw = $5
sub(/\),/, "", bw)
gain = $6
sub(/\(/, "", gain)
sub(/,/, "", gain)
power = $7
sub(/\)/, "", power)
sub(/,/, "", power)
# power might be in mW...
units = $8
sub(/\)/, "", units)
sub(/,/, "", units)
if (units == "mW") {
if (power == 100) {
power = 20
} else if (power == 200) {
power = 23
} else if (power == 500) {
power = 27
} else if (power == 1000) {
power = 30
} else {
print "Unknown power value in database!"
}
}
flagstr = ""
for (i=8; i<=NF; i++)
flagstr = flagstr $i
split(flagstr, flagarray, ",")
flags = ""
for (arg in flagarray) {
if (flagarray[arg] == "NO-OFDM") {
flags = flags "\n\t\t\tNL80211_RRF_NO_OFDM | "
} else if (flagarray[arg] == "NO-CCK") {
flags = flags "\n\t\t\tNL80211_RRF_NO_CCK | "
} else if (flagarray[arg] == "NO-INDOOR") {
flags = flags "\n\t\t\tNL80211_RRF_NO_INDOOR | "
} else if (flagarray[arg] == "NO-OUTDOOR") {
flags = flags "\n\t\t\tNL80211_RRF_NO_OUTDOOR | "
} else if (flagarray[arg] == "DFS") {
flags = flags "\n\t\t\tNL80211_RRF_DFS | "
} else if (flagarray[arg] == "PTP-ONLY") {
flags = flags "\n\t\t\tNL80211_RRF_PTP_ONLY | "
} else if (flagarray[arg] == "PTMP-ONLY") {
flags = flags "\n\t\t\tNL80211_RRF_PTMP_ONLY | "
} else if (flagarray[arg] == "PASSIVE-SCAN") {
flags = flags "\n\t\t\tNL80211_RRF_PASSIVE_SCAN | "
} else if (flagarray[arg] == "NO-IBSS") {
flags = flags "\n\t\t\tNL80211_RRF_NO_IBSS | "
}
}
flags = flags "0"
printf "\t\tREG_RULE(%d, %d, %d, %d, %d, %s),\n", start, end, bw, gain, power, flags
rules++
}
active && /^[ \t]*$/ {
active = 0
printf "\t},\n"
printf "\t.n_reg_rules = %d\n", rules
printf "};\n\n"
rules = 0;
}
END {
print regdb "};"
print ""
print "int reg_regdb_size = ARRAY_SIZE(reg_regdb);"
}