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Duplicate less code.
This commit is contained in:
Linus Nordberg
parent
46c76e6bdd
commit
6a241ff3ff
213
src/or/geoip.c
213
src/or/geoip.c
@ -73,17 +73,18 @@ geoip_get_country(const char *country)
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return (country_t)idx;
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}
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/** Add an entry to the GeoIP table, mapping all IPs between <b>low</b> and
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* <b>high</b>, inclusive, to the 2-letter country code <b>country</b>.
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*/
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/** Add an entry to a GeoIP table, mapping all IP addresses between <b>low</b> and
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* <b>high</b>, inclusive, to the 2-letter country code <b>country</b>. */
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static void
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geoip_ipv4_add_entry(uint32_t low, uint32_t high, const char *country)
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geoip_add_entry(const tor_addr_t *low, const tor_addr_t *high,
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const char *country)
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{
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intptr_t idx;
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geoip_ipv4_entry_t *ent;
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void *idxplus1_;
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if (high < low)
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if (tor_addr_family(low) != tor_addr_family(high))
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return;
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if (tor_addr_compare(high, low, CMP_EXACT) < 0)
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return;
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idxplus1_ = strmap_get_lc(country_idxplus1_by_lc_code, country);
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@ -102,40 +103,89 @@ geoip_ipv4_add_entry(uint32_t low, uint32_t high, const char *country)
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geoip_country_t *c = smartlist_get(geoip_countries, idx);
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tor_assert(!strcasecmp(c->countrycode, country));
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}
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ent = tor_malloc_zero(sizeof(geoip_ipv4_entry_t));
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ent->ip_low = low;
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ent->ip_high = high;
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ent->country = idx;
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smartlist_add(geoip_ipv4_entries, ent);
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if (tor_addr_family(low) == AF_INET) {
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geoip_ipv4_entry_t *ent = tor_malloc_zero(sizeof(geoip_ipv4_entry_t));
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ent->ip_low = tor_addr_to_ipv4h(low);
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ent->ip_high = tor_addr_to_ipv4h(high);
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ent->country = idx;
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smartlist_add(geoip_ipv4_entries, ent);
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} else if (tor_addr_family(low) == AF_INET6) {
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geoip_ipv6_entry_t *ent = tor_malloc_zero(sizeof(geoip_ipv6_entry_t));
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ent->ip_low = *tor_addr_to_in6(low);
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ent->ip_high = *tor_addr_to_in6(high);
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ent->country = idx;
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smartlist_add(geoip_ipv6_entries, ent);
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}
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}
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/** Add an entry to the GeoIP table, parsing it from <b>line</b>. The
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* format is as for geoip_load_file(). */
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/** Add an entry to the GeoIP table indicated by <b>family</b>,
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* parsing it from <b>line</b>. The format is as for geoip_load_file(). */
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/*private*/ int
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geoip_ipv4_parse_entry(const char *line)
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geoip_parse_entry(const char *line, sa_family_t family)
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{
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unsigned int low, high;
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char b[3];
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tor_addr_t low_addr, high_addr;
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char c[3];
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char *country = NULL;
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if (!geoip_countries)
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init_geoip_countries();
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if (!geoip_ipv4_entries)
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geoip_ipv4_entries = smartlist_new();
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if (family == AF_INET) {
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if (!geoip_ipv4_entries)
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geoip_ipv4_entries = smartlist_new();
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} else if (family == AF_INET6) {
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if (!geoip_ipv6_entries)
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geoip_ipv6_entries = smartlist_new();
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} else {
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log_warn(LD_GENERAL, "Unsupported family: %d", family);
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return -1;
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}
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while (TOR_ISSPACE(*line))
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++line;
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if (*line == '#')
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return 0;
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if (tor_sscanf(line,"%u,%u,%2s", &low, &high, b) == 3) {
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geoip_ipv4_add_entry(low, high, b);
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return 0;
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} else if (tor_sscanf(line,"\"%u\",\"%u\",\"%2s\",", &low, &high, b) == 3) {
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geoip_ipv4_add_entry(low, high, b);
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return 0;
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} else {
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log_warn(LD_GENERAL, "Unable to parse line from GEOIP file: %s",
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escaped(line));
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return -1;
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if (family == AF_INET) {
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unsigned int low, high;
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if (tor_sscanf(line,"%u,%u,%2s", &low, &high, c) == 3 ||
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tor_sscanf(line,"\"%u\",\"%u\",\"%2s\",", &low, &high, c) == 3) {
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tor_addr_from_ipv4h(&low_addr, low);
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tor_addr_from_ipv4h(&high_addr, high);
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} else
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goto fail;
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country = c;
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} else { /* AF_INET6 */
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char buf[512];
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char *low_str, *high_str;
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struct in6_addr low, high;
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char *strtok_state;
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strlcpy(buf, line, sizeof(buf));
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low_str = tor_strtok_r(buf, ",", &strtok_state);
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if (!low_str)
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goto fail;
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high_str = tor_strtok_r(NULL, ",", &strtok_state);
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if (!high_str)
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goto fail;
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country = tor_strtok_r(NULL, "\n", &strtok_state);
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if (!country)
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goto fail;
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if (strlen(country) != 2)
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goto fail;
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if (tor_inet_pton(AF_INET6, low_str, &low) <= 0)
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goto fail;
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tor_addr_from_in6(&low_addr, &low);
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if (tor_inet_pton(AF_INET6, high_str, &high) <= 0)
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goto fail;
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tor_addr_from_in6(&high_addr, &high);
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}
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geoip_add_entry(&low_addr, &high_addr, country);
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return 0;
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fail:
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log_warn(LD_GENERAL, "Unable to parse line from GEOIP %s file: %s",
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family == AF_INET ? "IPv4" : "IPv6", escaped(line));
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return -1;
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}
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/** Sorting helper: return -1, 1, or 0 based on comparison of two
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@ -168,95 +218,6 @@ geoip_ipv4_compare_key_to_entry_(const void *_key, const void **_member)
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return 0;
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}
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/** Add an entry to the GeoIP IPv6 table, mapping all IPs between
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* <b>low</b> and <b>high</b>, inclusive, to the 2-letter country code
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* <b>country</b>. */
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static void
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geoip_ipv6_add_entry(struct in6_addr low, struct in6_addr high,
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const char *country)
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{
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intptr_t idx;
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geoip_ipv6_entry_t *ent;
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void *idxplus1_;
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if (memcmp(&high, &low, sizeof(struct in6_addr)) < 0)
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return;
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idxplus1_ = strmap_get_lc(country_idxplus1_by_lc_code, country);
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if (!idxplus1_) {
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geoip_country_t *c = tor_malloc_zero(sizeof(geoip_country_t));
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strlcpy(c->countrycode, country, sizeof(c->countrycode));
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tor_strlower(c->countrycode);
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smartlist_add(geoip_countries, c);
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idx = smartlist_len(geoip_countries) - 1;
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strmap_set_lc(country_idxplus1_by_lc_code, country, (void*)(idx+1));
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} else {
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idx = ((uintptr_t)idxplus1_)-1;
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}
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{
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geoip_country_t *c = smartlist_get(geoip_countries, idx);
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tor_assert(!strcasecmp(c->countrycode, country));
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}
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ent = tor_malloc_zero(sizeof(geoip_ipv6_entry_t));
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ent->ip_low = low;
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ent->ip_high = high;
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ent->country = idx;
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smartlist_add(geoip_ipv6_entries, ent);
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}
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/** Add an entry to the GeoIP ipv6 table, parsing it from <b>line</b>. The
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* format is as for geoip_load_file(). */
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/* XXX5053 Should this code also support parsing Maxmind's GeoIPv6.csv
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* format directly, similar to how their v4 format is also accepted? That
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* would enable people to use their commercial IPv6 databases instead of
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* our free one, if they wanted. -KL */
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/*private*/ int
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geoip_ipv6_parse_entry(const char *line)
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{
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char buf[512];
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char *low_str, *high_str, *country;
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struct in6_addr low, high;
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char *strtok_state;
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strlcpy(buf, line, sizeof(buf));
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if (!geoip_countries)
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init_geoip_countries();
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if (!geoip_ipv6_entries)
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geoip_ipv6_entries = smartlist_new();
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while (TOR_ISSPACE(*line))
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++line;
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if (*line == '#')
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return 0;
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low_str = tor_strtok_r(buf, ",", &strtok_state);
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if (!low_str)
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goto fail;
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high_str = tor_strtok_r(NULL, ",", &strtok_state);
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if (!high_str)
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goto fail;
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country = tor_strtok_r(NULL, "\n", &strtok_state);
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if (!country)
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goto fail;
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if (strlen(country) != 2)
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goto fail;
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if (tor_inet_pton(AF_INET6, low_str, &low) <= 0)
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goto fail;
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if (tor_inet_pton(AF_INET6, high_str, &high) <= 0)
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goto fail;
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geoip_ipv6_add_entry(low, high, country);
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return 0;
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fail:
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log_warn(LD_GENERAL, "Unable to parse line from GEOIP IPV6 file: %s",
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escaped(line));
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return -1;
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}
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/** Sorting helper: return -1, 1, or 0 based on comparison of two
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* geoip_ipv6_entry_t */
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static int
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@ -312,16 +273,21 @@ init_geoip_countries(void)
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strmap_set_lc(country_idxplus1_by_lc_code, "??", (void*)(1));
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}
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/** Clear the GeoIP database and reload it from the file
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* <b>filename</b>. Return 0 on success, -1 on failure.
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/** Clear appropriate GeoIP database, based on <b>family</b>, and
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* reload it from the file <b>filename</b>. Return 0 on success, -1 on
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* failure.
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*
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* Recognized line formats are:
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* Recognized line formats for IPv4 are:
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* INTIPLOW,INTIPHIGH,CC
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* and
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* "INTIPLOW","INTIPHIGH","CC","CC3","COUNTRY NAME"
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* where INTIPLOW and INTIPHIGH are IPv4 addresses encoded as 4-byte unsigned
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* integers, and CC is a country code.
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*
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* Recognized line format for IPv6 is:
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* IPV6LOW,IPV6HIGH,CC
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* where IPV6LOW and IPV6HIGH are IPv6 addresses and CC is a country code.
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*
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* It also recognizes, and skips over, blank lines and lines that start
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* with '#' (comments).
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*/
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@ -362,17 +328,14 @@ geoip_load_file(sa_family_t family, const char *filename)
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geoip_digest_env = crypto_digest_new();
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log_notice(LD_GENERAL, "Parsing GEOIP %s file %s.",
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(family == AF_INET) ? "ipv4" : "ipv6", filename);
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(family == AF_INET) ? "IPv4" : "IPv6", filename);
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while (!feof(f)) {
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char buf[512];
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if (fgets(buf, (int)sizeof(buf), f) == NULL)
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break;
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crypto_digest_add_bytes(geoip_digest_env, buf, strlen(buf));
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/* FFFF track full country name. */
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if (family == AF_INET)
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geoip_ipv4_parse_entry(buf);
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else /* AF_INET6 */
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geoip_ipv6_parse_entry(buf);
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geoip_parse_entry(buf, family);
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}
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/*XXXX abort and return -1 if no entries/illformed?*/
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fclose(f);
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@ -13,8 +13,7 @@
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#define _TOR_GEOIP_H
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#ifdef GEOIP_PRIVATE
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int geoip_ipv4_parse_entry(const char *line);
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int geoip_ipv6_parse_entry(const char *line);
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int geoip_parse_entry(const char *line, sa_family_t family);
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int geoip_get_country_by_ipv4(uint32_t ipaddr);
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int geoip_get_country_by_ipv6(const struct in6_addr *addr);
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#endif
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@ -1461,22 +1461,20 @@ test_geoip(void)
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/* Populate the DB a bit. Add these in order, since we can't do the final
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* 'sort' step. These aren't very good IP addresses, but they're perfectly
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* fine uint32_t values. */
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test_eq(0, geoip_ipv4_parse_entry("10,50,AB"));
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test_eq(0, geoip_ipv4_parse_entry("52,90,XY"));
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test_eq(0, geoip_ipv4_parse_entry("95,100,AB"));
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test_eq(0, geoip_ipv4_parse_entry("\"105\",\"140\",\"ZZ\""));
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test_eq(0, geoip_ipv4_parse_entry("\"150\",\"190\",\"XY\""));
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test_eq(0, geoip_ipv4_parse_entry("\"200\",\"250\",\"AB\""));
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test_eq(0, geoip_parse_entry("10,50,AB", AF_INET));
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test_eq(0, geoip_parse_entry("52,90,XY", AF_INET));
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test_eq(0, geoip_parse_entry("95,100,AB", AF_INET));
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test_eq(0, geoip_parse_entry("\"105\",\"140\",\"ZZ\"", AF_INET));
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test_eq(0, geoip_parse_entry("\"150\",\"190\",\"XY\"", AF_INET));
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test_eq(0, geoip_parse_entry("\"200\",\"250\",\"AB\"", AF_INET));
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/* Populate the IPv6 DB equivalently with fake IPs in the same range */
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test_eq(0, geoip_ipv6_parse_entry("::a,::32,AB"));
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test_eq(0, geoip_ipv6_parse_entry("::34,::5a,XY"));
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test_eq(0, geoip_ipv6_parse_entry("::5f,::64,AB"));
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/* XXX5053 If we plan to support parsing Maxmind's GeoIPv6.csv format,
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* we should test it here. If not, remove this comment. -KL */
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test_eq(0, geoip_ipv6_parse_entry("::69,::8c,ZZ"));
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test_eq(0, geoip_ipv6_parse_entry("::96,::be,XY"));
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test_eq(0, geoip_ipv6_parse_entry("::c8,::fa,AB"));
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test_eq(0, geoip_parse_entry("::a,::32,AB", AF_INET6));
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test_eq(0, geoip_parse_entry("::34,::5a,XY", AF_INET6));
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test_eq(0, geoip_parse_entry("::5f,::64,AB", AF_INET6));
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test_eq(0, geoip_parse_entry("::69,::8c,ZZ", AF_INET6));
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test_eq(0, geoip_parse_entry("::96,::be,XY", AF_INET6));
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test_eq(0, geoip_parse_entry("::c8,::fa,AB", AF_INET6));
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/* We should have 4 countries: ??, ab, xy, zz. */
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test_eq(4, geoip_get_n_countries());
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