2006-06-27 00:36:13 +00:00
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# Copyright (C) 2006 OpenWrt.org
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2006-04-05 02:09:22 +00:00
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function portstr(type, str) {
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gsub(/-/, ":", str)
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if (insmod_mport != 1) {
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print "insmod ipt_multiport >&- 2>&-"
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insmod_mport = 1
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}
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if (type == "src") return " -m multiport --sports " str
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else return " -m multiport --dports " str
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}
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function str2ipt(str) {
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str2data(str)
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_cmd = ""
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if (_l["src"] != "") _cmd = _cmd " -s " _l["src"]
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if (_l["dest"] != "") _cmd = _cmd " -d " _l["dest"]
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if (_l["proto"] != "") {
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_cmd = _cmd " -p " _l["proto"]
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}
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# scripts need to check for proto="" and emit two rules in that case
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if ((_l["proto"] == "") || (_l["proto"] == "tcp") || (_l["proto"] == "udp")) {
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if (_l["sport"] != "") _cmd = _cmd portstr("src", _l["sport"])
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if (_l["dport"] != "") _cmd = _cmd portstr("dest", _l["dport"])
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}
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if (_l["layer7"] != "") {
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if (insmod_l7 != 1) {
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print "insmod ipt_layer7 >&- 2>&-"
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insmod_l7 = 1
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}
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_cmd = _cmd " -m layer7 --l7proto " _l["layer7"]
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}
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return _cmd
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}
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function str2data(str) {
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delete _l
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_n = split(str, _o, "[\t ]")
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for (_i = 1; _i <= _n; _i++) {
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_n2 = split(_o[_i], _c, "=")
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if (_n2 == 2) _l[_c[1]] = _c[2]
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}
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}
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function bitcount(c) {
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c=and(rshift(c, 1),0x55555555)+and(c,0x55555555)
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c=and(rshift(c, 2),0x33333333)+and(c,0x33333333)
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c=and(rshift(c, 4),0x0f0f0f0f)+and(c,0x0f0f0f0f)
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c=and(rshift(c, 8),0x00ff00ff)+and(c,0x00ff00ff)
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c=and(rshift(c,16),0x0000ffff)+and(c,0x0000ffff)
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return c
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}
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function validate_netmask(nm) {
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return and(-nm,compl(nm))
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}
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function ip2int(ip) {
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for (ret=0,n=split(ip,a,"\."),x=1;x<=n;x++) ret=or(lshift(ret,8),a[x])
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return ret
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}
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function int2ip(ip,ret,x) {
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ret=and(ip,255)
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ip=rshift(ip,8)
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for(;x<3;ret=and(ip,255)"."ret,ip=rshift(ip,8),x++);
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return ret
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}
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