Adding upstream version 2.15.2.

Signed-off-by: Daniel Baumann <daniel@debian.org>

1 files changed, 326 insertions, 0 deletions

diff --git a/src/country_index.c b/src/country_index.c
new file mode 100644
index 0000000..ce0190f
--- /dev/null
+++ b/src/country_index.c
@@ -0,0 +1,326 @@
+/*
+ * Copyright (c) 2008-2024 OARC, Inc.
+ * Copyright (c) 2007-2008, Internet Systems Consortium, Inc.
+ * Copyright (c) 2003-2007, The Measurement Factory, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#include "country_index.h"
+#include "xmalloc.h"
+#include "hashtbl.h"
+#include "syslog_debug.h"
+#include "geoip.h"
+#if defined(HAVE_LIBGEOIP) && defined(HAVE_GEOIP_H)
+#define HAVE_GEOIP 1
+#include <GeoIP.h>
+#endif
+#if defined(HAVE_LIBMAXMINDDB) && defined(HAVE_MAXMINDDB_H)
+#define HAVE_MAXMINDDB 1
+#include <maxminddb.h>
+#endif
+
+#ifdef HAVE_MAXMINDDB
+#include "compat.h"
+#endif
+
+#ifdef HAVE_MAXMINDDB
+#include <errno.h>
+#endif
+#include <string.h>
+#include <strings.h>
+#include <stdlib.h>
+
+extern int                debug_flag;
+extern char*              geoip_v4_dat;
+extern int                geoip_v4_options;
+extern char*              geoip_v6_dat;
+extern int                geoip_v6_options;
+extern enum geoip_backend country_indexer_backend;
+extern char*              maxminddb_country;
+static hashfunc           country_hashfunc;
+static hashkeycmp         country_cmpfunc;
+
+#define MAX_ARRAY_SZ 65536
+static hashtbl* theHash  = NULL;
+static int      next_idx = 0;
+#ifdef HAVE_GEOIP
+static GeoIP* geoip  = NULL;
+static GeoIP* geoip6 = NULL;
+#endif
+#ifdef HAVE_MAXMINDDB
+static MMDB_s mmdb;
+static char   _mmcountry[32];
+static int    have_mmdb = 0;
+#endif
+static char  ipstr[81];
+static char* unknown    = "??";
+static char* unknown_v4 = "?4";
+static char* unknown_v6 = "?6";
+
+typedef struct
+{
+    char* country;
+    int   index;
+} countryobj;
+
+const char*
+country_get_from_message(dns_message* m)
+{
+    transport_message* tm = m->tm;
+    const char*        cc = unknown;
+
+    if (country_indexer_backend == geoip_backend_libgeoip) {
+        if (!inXaddr_ntop(&tm->src_ip_addr, ipstr, sizeof(ipstr) - 1)) {
+            dfprint(0, "country_index: Error converting IP address");
+            return (unknown);
+        }
+    }
+
+    switch (tm->ip_version) {
+    case 4:
+        switch (country_indexer_backend) {
+        case geoip_backend_libgeoip:
+#ifdef HAVE_GEOIP
+            if (geoip) {
+                cc = GeoIP_country_code_by_addr(geoip, ipstr);
+                if (cc == NULL) {
+                    cc = unknown_v4;
+                }
+            }
+#endif
+            break;
+        case geoip_backend_libmaxminddb:
+#ifdef HAVE_MAXMINDDB
+            if (have_mmdb) {
+                struct sockaddr_in   s;
+                int                  ret;
+                MMDB_lookup_result_s r;
+
+                s.sin_family = AF_INET;
+                s.sin_addr   = tm->src_ip_addr.in4;
+
+                r = MMDB_lookup_sockaddr(&mmdb, (struct sockaddr*)&s, &ret);
+                if (ret == MMDB_SUCCESS && r.found_entry) {
+                    MMDB_entry_data_s entry_data;
+
+                    if (MMDB_get_value(&r.entry, &entry_data, "country", "iso_code", 0) == MMDB_SUCCESS
+                        && entry_data.type == MMDB_DATA_TYPE_UTF8_STRING) {
+                        size_t len = entry_data.data_size > (sizeof(_mmcountry) - 1) ? (sizeof(_mmcountry) - 1) : entry_data.data_size;
+                        memcpy(_mmcountry, entry_data.utf8_string, len);
+                        _mmcountry[len] = 0;
+                        cc              = _mmcountry;
+                        break;
+                    }
+                }
+            }
+            cc = unknown_v4;
+#endif
+            break;
+        default:
+            break;
+        }
+        break;
+
+    case 6:
+        switch (country_indexer_backend) {
+        case geoip_backend_libgeoip:
+#ifdef HAVE_GEOIP
+            if (geoip6) {
+                cc = GeoIP_country_code_by_addr_v6(geoip6, ipstr);
+                if (cc == NULL) {
+                    cc = unknown_v6;
+                }
+            }
+#endif
+            break;
+        case geoip_backend_libmaxminddb:
+#ifdef HAVE_MAXMINDDB
+            if (have_mmdb) {
+                struct sockaddr_in6  s;
+                int                  ret;
+                MMDB_lookup_result_s r;
+
+                s.sin6_family = AF_INET;
+                s.sin6_addr   = tm->src_ip_addr.in6;
+
+                r = MMDB_lookup_sockaddr(&mmdb, (struct sockaddr*)&s, &ret);
+                if (ret == MMDB_SUCCESS && r.found_entry) {
+                    MMDB_entry_data_s entry_data;
+
+                    if (MMDB_get_value(&r.entry, &entry_data, "country", "iso_code", 0) == MMDB_SUCCESS
+                        && entry_data.type == MMDB_DATA_TYPE_UTF8_STRING) {
+                        size_t len = entry_data.data_size > (sizeof(_mmcountry) - 1) ? (sizeof(_mmcountry) - 1) : entry_data.data_size;
+                        memcpy(_mmcountry, entry_data.utf8_string, len);
+                        _mmcountry[len] = 0;
+                        cc              = _mmcountry;
+                        break;
+                    }
+                }
+            }
+            cc = unknown_v6;
+#endif
+            break;
+        default:
+            break;
+        }
+        break;
+
+    default:
+        break;
+    }
+
+    dfprintf(1, "country_index: country code: %s", cc);
+    return cc;
+}
+
+int country_indexer(const dns_message* m)
+{
+    const char* country;
+    countryobj* obj;
+    if (m->malformed)
+        return -1;
+    country = country_get_from_message((dns_message*)m);
+    if (NULL == theHash) {
+        theHash = hash_create(MAX_ARRAY_SZ, country_hashfunc, country_cmpfunc, 1, afree, afree);
+        if (NULL == theHash)
+            return -1;
+    }
+    if ((obj = hash_find(country, theHash)))
+        return obj->index;
+    obj = acalloc(1, sizeof(*obj));
+    if (NULL == obj)
+        return -1;
+    obj->country = astrdup(country);
+    if (NULL == obj->country) {
+        afree(obj);
+        return -1;
+    }
+    obj->index = next_idx;
+    if (0 != hash_add(obj->country, obj, theHash)) {
+        afree(obj->country);
+        afree(obj);
+        return -1;
+    }
+    next_idx++;
+    return obj->index;
+}
+
+int country_iterator(const char** label)
+{
+    countryobj* obj;
+    static char label_buf[MAX_QNAME_SZ];
+    if (0 == next_idx)
+        return -1;
+    if (NULL == label) {
+        /* initialize and tell caller how big the array is */
+        hash_iter_init(theHash);
+        return next_idx;
+    }
+    if ((obj = hash_iterate(theHash)) == NULL)
+        return -1;
+    snprintf(label_buf, sizeof(label_buf), "%s", obj->country);
+    *label = label_buf;
+    return obj->index;
+}
+
+void country_reset()
+{
+    theHash  = NULL;
+    next_idx = 0;
+}
+
+static unsigned int
+country_hashfunc(const void* key)
+{
+    return hashendian(key, strlen(key), 0);
+}
+
+static int
+country_cmpfunc(const void* a, const void* b)
+{
+    return strcasecmp(a, b);
+}
+
+void country_init(void)
+{
+    switch (country_indexer_backend) {
+    case geoip_backend_libgeoip:
+#ifdef HAVE_GEOIP
+        if (geoip_v4_dat) {
+            geoip = GeoIP_open(geoip_v4_dat, geoip_v4_options);
+            if (geoip == NULL) {
+                dsyslog(LOG_ERR, "country_index: Error opening IPv4 Country DB. Make sure libgeoip's GeoIP.dat file is available");
+                exit(1);
+            }
+        }
+        if (geoip_v6_dat) {
+            geoip6 = GeoIP_open(geoip_v6_dat, geoip_v6_options);
+            if (geoip6 == NULL) {
+                dsyslog(LOG_ERR, "country_index: Error opening IPv6 Country DB. Make sure libgeoip's GeoIPv6.dat file is available");
+                exit(1);
+            }
+        }
+        memset(ipstr, 0, sizeof(ipstr));
+        if (geoip || geoip6) {
+            dsyslog(LOG_INFO, "country_index: Sucessfully initialized GeoIP");
+        } else {
+            dsyslog(LOG_INFO, "country_index: No database loaded for GeoIP");
+        }
+#endif
+        break;
+    case geoip_backend_libmaxminddb:
+#ifdef HAVE_MAXMINDDB
+        if (maxminddb_country) {
+            int  ret;
+            char errbuf[512];
+
+            ret = MMDB_open(maxminddb_country, 0, &mmdb);
+            if (ret == MMDB_IO_ERROR) {
+                dsyslogf(LOG_ERR, "country_index: Error opening MaxMind Country, IO error: %s", dsc_strerror(errno, errbuf, sizeof(errbuf)));
+                exit(1);
+            } else if (ret != MMDB_SUCCESS) {
+                dsyslogf(LOG_ERR, "country_index: Error opening MaxMind Country: %s", MMDB_strerror(ret));
+                exit(1);
+            }
+            dsyslog(LOG_INFO, "country_index: Sucessfully initialized MaxMind Country");
+            have_mmdb = 1;
+        } else {
+            dsyslog(LOG_INFO, "country_index: No database loaded for MaxMind Country");
+        }
+#endif
+        break;
+    default:
+        break;
+    }
+}