ref: dde3628d54073e0569bf565e6ec861e42cfa35f6
dir: /sys/src/cmd/ip/httpd/classify.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <ndb.h>
#include "whois.h"
typedef struct Country Country;
struct Country
{
char *code;
char *name;
};
Country badc[] =
{
{"af", "afghanistan"},
{"cu", "cuba"},
{"ir", "iran"},
{"iq", "iraq"},
{"ly", "libya"},
{"kp", "north korea"},
{"sd", "sudan"},
{"sy", "syria"},
{ 0, 0 }
};
Country goodc[] =
{
// the original, us and canada
{"us", "united states of america"},
{"ca", "canada"},
{"gov", "gov"},
{"mil", "mil"},
// the european union
{ "eu", "european union" },
{ "be", "belgium" },
{ "de", "germany" },
{ "fr", "france" },
{ "it", "italy" },
{ "lu", "luxembourg" },
{ "nl", "netherlands" },
{ "dk", "denmark" },
{ "ie", "ireland" },
{ "gb", "great britain" },
{ "uk", "united kingdom" },
{ "gr", "greece" },
{ "es", "spain" },
{ "pt", "portugal" },
{ "at", "austria" },
{ "fi", "finland" },
{ "se", "sweden" },
// the rest
{"au", "australia"},
{"no", "norway"},
{"cz", "czech republic"},
{"hu", "hungary"},
{"pl", "poland"},
{"jp", "japan"},
{"ch", "switzerland"},
{"nz", "new zealand"},
{ 0, 0 }
};
char *gov[] =
{
"gov",
"gouv",
"mil",
"government",
0,
};
Country allc[] =
{
{ "ad", "andorra" },
{ "ae", "united arab emirates" },
{ "af", "afghanistan" },
{ "ag", "antigua and barbuda" },
{ "ai", "anguilla" },
{ "al", "albania" },
{ "am", "armenia" },
{ "an", "netherlands antilles" },
{ "ao", "angola" },
{ "aq", "antarctica" },
{ "ar", "argentina" },
{ "as", "american samoa" },
{ "at", "austria" },
{ "au", "australia" },
{ "aw", "aruba" },
{ "az", "azerbaijan" },
{ "ba", "bosnia and herzegovina" },
{ "bb", "barbados" },
{ "bd", "bangladesh" },
{ "be", "belgium" },
{ "bf", "burkina faso" },
{ "bg", "bulgaria" },
{ "bh", "bahrain" },
{ "bi", "burundi" },
{ "bj", "benin" },
{ "bm", "bermuda" },
{ "bn", "brunei darussalam" },
{ "bo", "bolivia" },
{ "br", "brazil" },
{ "bs", "bahamas" },
{ "bt", "bhutan" },
{ "bu", "burma" },
{ "bv", "bouvet island" },
{ "bw", "botswana" },
{ "by", "belarus" },
{ "bz", "belize" },
{ "ca", "canada" },
{ "cc", "cocos (keeling) islands" },
{ "cf", "central african republic" },
{ "cg", "congo" },
{ "ch", "switzerland" },
{ "ci", "cote d'ivoire (ivory coast)" },
{ "ck", "cook islands" },
{ "cl", "chile" },
{ "cm", "cameroon" },
{ "cn", "china" },
{ "co", "colombia" },
{ "cr", "costa rica" },
{ "cs", "czechoslovakia (former)" },
{ "ct", "canton and enderbury island" },
{ "cu", "cuba" },
{ "cv", "cape verde" },
{ "cx", "christmas island" },
{ "cy", "cyprus" },
{ "cz", "czech republic" },
{ "dd", "german democratic republic" },
{ "de", "germany" },
{ "dj", "djibouti" },
{ "dk", "denmark" },
{ "dm", "dominica" },
{ "do", "dominican republic" },
{ "dz", "algeria" },
{ "ec", "ecuador" },
{ "ee", "estonia" },
{ "eg", "egypt" },
{ "eh", "western sahara" },
{ "er", "eritrea" },
{ "es", "spain" },
{ "et", "ethiopia" },
{ "eu", "european union" },
{ "fi", "finland" },
{ "fj", "fiji" },
{ "fk", "falkland islands (malvinas)" },
{ "fm", "micronesia" },
{ "fo", "faroe islands" },
{ "fr", "france" },
{ "fx", "france, metropolitan" },
{ "ga", "gabon" },
{ "gb", "great britain (uk)" },
{ "gd", "grenada" },
{ "ge", "georgia" },
{ "gf", "french guiana" },
{ "gh", "ghana" },
{ "gi", "gibraltar" },
{ "gl", "greenland" },
{ "gm", "gambia" },
{ "gn", "guinea" },
{ "gp", "guadeloupe" },
{ "gq", "equatorial guinea" },
{ "gr", "greece" },
{ "gs", "s. georgia and s. sandwich isls." },
{ "gt", "guatemala" },
{ "gu", "guam" },
{ "gw", "guinea-bissau" },
{ "gy", "guyana" },
{ "hk", "hong kong" },
{ "hm", "heard and mcdonald islands" },
{ "hn", "honduras" },
{ "hr", "croatia (hrvatska)" },
{ "ht", "haiti" },
{ "hu", "hungary" },
{ "id", "indonesia" },
{ "ie", "ireland" },
{ "il", "israel" },
{ "in", "india" },
{ "io", "british indian ocean territory" },
{ "iq", "iraq" },
{ "ir", "iran" },
{ "is", "iceland" },
{ "it", "italy" },
{ "jm", "jamaica" },
{ "jo", "jordan" },
{ "jp", "japan" },
{ "jt", "johnston island" },
{ "ke", "kenya" },
{ "kg", "kyrgyzstan" },
{ "kh", "cambodia (democratic kampuchea)" },
{ "ki", "kiribati" },
{ "km", "comoros" },
{ "kn", "saint kitts and nevis" },
{ "kp", "korea (north)" },
{ "kr", "korea (south)" },
{ "kw", "kuwait" },
{ "ky", "cayman islands" },
{ "kz", "kazakhstan" },
{ "la", "laos" },
{ "lb", "lebanon" },
{ "lc", "saint lucia" },
{ "li", "liechtenstein" },
{ "lk", "sri lanka" },
{ "lr", "liberia" },
{ "ls", "lesotho" },
{ "lt", "lithuania" },
{ "lu", "luxembourg" },
{ "lv", "latvia" },
{ "ly", "libya" },
{ "ma", "morocco" },
{ "mc", "monaco" },
{ "md", "moldova" },
{ "mg", "madagascar" },
{ "mh", "marshall islands" },
{ "mi", "midway islands" },
{ "mk", "macedonia" },
{ "ml", "mali" },
{ "mm", "myanmar" },
{ "mn", "mongolia" },
{ "mo", "macau" },
{ "mp", "northern mariana islands" },
{ "mq", "martinique" },
{ "mr", "mauritania" },
{ "ms", "montserrat" },
{ "mt", "malta" },
{ "mu", "mauritius" },
{ "mv", "maldives" },
{ "mw", "malawi" },
{ "mx", "mexico" },
{ "my", "malaysia" },
{ "mz", "mozambique" },
{ "na", "namibia" },
{ "nc", "new caledonia" },
{ "ne", "niger" },
{ "nf", "norfolk island" },
{ "ng", "nigeria" },
{ "ni", "nicaragua" },
{ "nl", "netherlands" },
{ "no", "norway" },
{ "np", "nepal" },
{ "nq", "dronning maud land" },
{ "nr", "nauru" },
{ "nt", "neutral zone" },
{ "nu", "niue" },
{ "nz", "new zealand (aotearoa)" },
{ "om", "oman" },
{ "pa", "panama" },
{ "pc", "pacific islands" },
{ "pe", "peru" },
{ "pf", "french polynesia" },
{ "pg", "papua new guinea" },
{ "ph", "philippines" },
{ "pk", "pakistan" },
{ "pl", "poland" },
{ "pm", "st. pierre and miquelon" },
{ "pn", "pitcairn" },
{ "pr", "puerto rico" },
{ "pu", "united states misc. pacific islands" },
{ "pt", "portugal" },
{ "pw", "palau" },
{ "py", "paraguay" },
{ "qa", "qatar" },
{ "re", "reunion" },
{ "ro", "romania" },
{ "ru", "russian federation" },
{ "rw", "rwanda" },
{ "sa", "saudi arabia" },
{ "sb", "solomon islands" },
{ "sc", "seychelles" },
{ "sd", "sudan" },
{ "se", "sweden" },
{ "sg", "singapore" },
{ "sh", "st. helena" },
{ "si", "slovenia" },
{ "sj", "svalbard and jan mayen islands" },
{ "sk", "slovak republic" },
{ "sl", "sierra leone" },
{ "sm", "san marino" },
{ "sn", "senegal" },
{ "so", "somalia" },
{ "sr", "suriname" },
{ "st", "sao tome and principe" },
{ "su", "ussr (former)" },
{ "sv", "el salvador" },
{ "sy", "syria" },
{ "sz", "swaziland" },
{ "tc", "turks and caicos islands" },
{ "td", "chad" },
{ "tf", "french southern territories" },
{ "tg", "togo" },
{ "th", "thailand" },
{ "tj", "tajikistan" },
{ "tk", "tokelau" },
{ "tm", "turkmenistan" },
{ "tn", "tunisia" },
{ "to", "tonga" },
{ "tp", "east timor" },
{ "tr", "turkey" },
{ "tt", "trinidad and tobago" },
{ "tv", "tuvalu" },
{ "tw", "taiwan" },
{ "tz", "tanzania" },
{ "ua", "ukraine" },
{ "ug", "uganda" },
{ "uk", "united kingdom" },
{ "um", "us minor outlying islands" },
{ "us", "united states" },
{ "uy", "uruguay" },
{ "uz", "uzbekistan" },
{ "va", "vatican city state (holy see)" },
{ "vc", "saint vincent and the grenadines" },
{ "ve", "venezuela" },
{ "vg", "virgin islands (british)" },
{ "vi", "virgin islands (u.s.)" },
{ "vn", "viet nam" },
{ "vu", "vanuatu" },
{ "wf", "wallis and futuna islands" },
{ "wk", "wake island" },
{ "ws", "samoa" },
{ "yd", "democratic yemen" },
{ "ye", "yemen" },
{ "yt", "mayotte" },
{ "yu", "yugoslavia" },
{ "za", "south africa" },
{ "zm", "zambia" },
{ "zr", "zaire" },
{ "zw", "zimbabwe" },
{"gov", "gov"},
{"mil", "mil"},
{ 0, 0 }
};
int classdebug;
static int
incountries(char *s, Country *cp)
{
for(; cp->code != 0; cp++)
if(cistrcmp(s, cp->code) == 0
|| cistrcmp(s, cp->name) == 0)
return 1;
return 0;
}
static int
indomains(char *s, char **dp)
{
for(; *dp != nil; dp++)
if(cistrcmp(s, *dp) == 0)
return 1;
return 0;
}
int
classify(char *ip, Ndbtuple *t)
{
int isgov, iscountry, isbadc, isgoodc;
char dom[256];
char *df[128];
Ndbtuple *nt, *x;
int n;
isgov = iscountry = isbadc = 0;
isgoodc = 1;
for(nt = t; nt != nil; nt = nt->entry){
if(strcmp(nt->attr, "country") == 0){
iscountry = 1;
if(incountries(nt->val, badc)){
if(classdebug)fprint(2, "isbadc\n");
isbadc = 1;
isgoodc = 0;
} else if(!incountries(nt->val, goodc)){
if(classdebug)fprint(2, "!isgoodc\n");
isgoodc = 0;
}
}
/* domain names can always hurt, even without forward verification */
if(strcmp(nt->attr, "dom") == 0){
strncpy(dom, nt->val, sizeof dom);
dom[sizeof(dom)-1] = 0;
n = getfields(dom, df, nelem(df), 0, ".");
/* a bad country in a domain name is always believed */
if(incountries(df[n-1], badc)){
if(classdebug)fprint(2, "isbadc dom\n");
isbadc = 1;
isgoodc = 0;
}
/* a goverment in a domain name is always believed */
if(n > 1 && indomains(df[n-2], gov))
isgov = 1;
}
}
if(iscountry == 0){
/* did the forward lookup work? */
for(nt = t; nt != nil; nt = nt->entry){
if(strcmp(nt->attr, "ip") == 0 && strcmp(nt->val, ip) == 0)
break;
}
/* see if the domain name ends in a country code */
if(nt != nil && (x = ndbfindattr(t, nt, "dom")) != nil){
strncpy(dom, x->val, sizeof dom);
dom[sizeof(dom)-1] = 0;
n = getfields(dom, df, nelem(df), 0, ".");
if(incountries(df[n-1], allc))
iscountry = 1;
}
}
if(iscountry == 0)
return Cunknown;
if(isbadc)
return Cbadc;
if(!isgoodc && isgov)
return Cbadgov;
return Cok;
}