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1#!/usr/bin/awk -f
2#
3# genregdb.awk -- generate regdb.c from db.txt
4#
5# Actually, it reads from stdin (presumed to be db.txt) and writes
6# to stdout (presumed to be regdb.c), but close enough...
7#
8# Copyright 2009 John W. Linville <linville@tuxdriver.com>
9#
10# Permission to use, copy, modify, and/or distribute this software for any
11# purpose with or without fee is hereby granted, provided that the above
12# copyright notice and this permission notice appear in all copies.
13#
14# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
15# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
16# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
17# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
18# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
19# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
20# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21
22BEGIN {
23	active = 0
24	rules = 0;
25	print "/*"
26	print " * DO NOT EDIT -- file generated from data in db.txt"
27	print " */"
28	print ""
29	print "#include <linux/nl80211.h>"
30	print "#include <net/cfg80211.h>"
31	print "#include \"regdb.h\""
32	print ""
33	regdb = "const struct ieee80211_regdomain *reg_regdb[] = {\n"
34}
35
36function parse_country_head() {
37	country=$2
38	sub(/:/, "", country)
39	printf "static const struct ieee80211_regdomain regdom_%s = {\n", country
40	printf "\t.alpha2 = \"%s\",\n", country
41	if ($NF ~ /DFS-ETSI/)
42		printf "\t.dfs_region = NL80211_DFS_ETSI,\n"
43	else if ($NF ~ /DFS-FCC/)
44		printf "\t.dfs_region = NL80211_DFS_FCC,\n"
45	else if ($NF ~ /DFS-JP/)
46		printf "\t.dfs_region = NL80211_DFS_JP,\n"
47	printf "\t.reg_rules = {\n"
48	active = 1
49	regdb = regdb "\t&regdom_" country ",\n"
50}
51
52function parse_reg_rule()
53{
54	flag_starts_at = 7
55
56	start = $1
57	sub(/\(/, "", start)
58	end = $3
59	bw = $5
60	sub(/\),/, "", bw)
61	gain = 0
62	power = $6
63	# power might be in mW...
64	units = $7
65	dfs_cac = 0
66
67	sub(/\(/, "", power)
68	sub(/\),/, "", power)
69	sub(/\),/, "", units)
70	sub(/\)/, "", units)
71
72	if (units == "mW") {
73		flag_starts_at = 8
74		power = 10 * log(power)/log(10)
75		if ($8 ~ /[[:digit:]]/) {
76			flag_starts_at = 9
77			dfs_cac = $8
78		}
79	} else {
80		if ($7 ~ /[[:digit:]]/) {
81			flag_starts_at = 8
82			dfs_cac = $7
83		}
84	}
85	sub(/\(/, "", dfs_cac)
86	sub(/\),/, "", dfs_cac)
87	flagstr = ""
88	for (i=flag_starts_at; i<=NF; i++)
89		flagstr = flagstr $i
90	split(flagstr, flagarray, ",")
91	flags = ""
92	for (arg in flagarray) {
93		if (flagarray[arg] == "NO-OFDM") {
94			flags = flags "\n\t\t\tNL80211_RRF_NO_OFDM | "
95		} else if (flagarray[arg] == "NO-CCK") {
96			flags = flags "\n\t\t\tNL80211_RRF_NO_CCK | "
97		} else if (flagarray[arg] == "NO-INDOOR") {
98			flags = flags "\n\t\t\tNL80211_RRF_NO_INDOOR | "
99		} else if (flagarray[arg] == "NO-OUTDOOR") {
100			flags = flags "\n\t\t\tNL80211_RRF_NO_OUTDOOR | "
101		} else if (flagarray[arg] == "DFS") {
102			flags = flags "\n\t\t\tNL80211_RRF_DFS | "
103		} else if (flagarray[arg] == "PTP-ONLY") {
104			flags = flags "\n\t\t\tNL80211_RRF_PTP_ONLY | "
105		} else if (flagarray[arg] == "PTMP-ONLY") {
106			flags = flags "\n\t\t\tNL80211_RRF_PTMP_ONLY | "
107		} else if (flagarray[arg] == "PASSIVE-SCAN") {
108			flags = flags "\n\t\t\tNL80211_RRF_NO_IR | "
109		} else if (flagarray[arg] == "NO-IBSS") {
110			flags = flags "\n\t\t\tNL80211_RRF_NO_IR | "
111		} else if (flagarray[arg] == "NO-IR") {
112			flags = flags "\n\t\t\tNL80211_RRF_NO_IR | "
113		} else if (flagarray[arg] == "AUTO-BW") {
114			flags = flags "\n\t\t\tNL80211_RRF_AUTO_BW | "
115		}
116
117	}
118	flags = flags "0"
119	printf "\t\tREG_RULE_EXT(%d, %d, %d, %d, %.0f, %d, %s),\n", start, end, bw, gain, power, dfs_cac, flags
120	rules++
121}
122
123function print_tail_country()
124{
125	active = 0
126	printf "\t},\n"
127	printf "\t.n_reg_rules = %d\n", rules
128	printf "};\n\n"
129	rules = 0;
130}
131
132/^[ \t]*#/ {
133	# Ignore
134}
135
136!active && /^[ \t]*$/ {
137	# Ignore
138}
139
140!active && /country/ {
141	parse_country_head()
142}
143
144active && /^[ \t]*\(/ {
145	parse_reg_rule()
146}
147
148active && /^[ \t]*$/ {
149	print_tail_country()
150}
151
152END {
153	if (active)
154		print_tail_country()
155	print regdb "};"
156	print ""
157	print "int reg_regdb_size = ARRAY_SIZE(reg_regdb);"
158}
159