*/
#include <arpa/inet.h>
+#include <endian.h>
#include <errno.h>
+#include <netinet/in.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <sys/mman.h>
#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
#include <loc/libloc.h>
+#include <loc/as.h>
+#include <loc/database.h>
#include <loc/format.h>
-
-#include "libloc-private.h"
-#include "as.h"
-#include "database.h"
-#include "stringpool.h"
+#include <loc/network.h>
+#include <loc/private.h>
+#include <loc/stringpool.h>
struct loc_database {
struct loc_ctx* ctx;
int refcount;
unsigned int version;
+ time_t created_at;
off_t vendor;
off_t description;
// ASes in the database
- struct loc_as** as;
+ struct loc_database_as_v0* as_v0;
size_t as_count;
+ // Network tree
+ struct loc_database_network_node_v0* network_nodes_v0;
+ size_t network_nodes_count;
+
+ // Networks
+ struct loc_database_network_v0* networks_v0;
+ size_t networks_count;
+
struct loc_stringpool* pool;
};
-const char* LOC_DATABASE_MAGIC = "LOCDBXX";
-unsigned int LOC_DATABASE_VERSION = 0;
+static int loc_database_read_magic(struct loc_database* db, FILE* f) {
+ struct loc_database_magic magic;
-struct loc_database_magic {
- char magic[7];
+ // Read from file
+ size_t bytes_read = fread(&magic, 1, sizeof(magic), f);
- // Database version information
- uint8_t version;
-};
+ // Check if we have been able to read enough data
+ if (bytes_read < sizeof(magic)) {
+ ERROR(db->ctx, "Could not read enough data to validate magic bytes\n");
+ DEBUG(db->ctx, "Read %zu bytes, but needed %zu\n", bytes_read, sizeof(magic));
+ return -ENOMSG;
+ }
+
+ // Compare magic bytes
+ if (memcmp(LOC_DATABASE_MAGIC, magic.magic, strlen(LOC_DATABASE_MAGIC)) == 0) {
+ DEBUG(db->ctx, "Magic value matches\n");
+
+ // Parse version
+ db->version = be16toh(magic.version);
+ DEBUG(db->ctx, "Database version is %u\n", db->version);
+
+ return 0;
+ }
+
+ ERROR(db->ctx, "Database format is not compatible\n");
+
+ // Return an error
+ return 1;
+}
+
+static int loc_database_read_as_section_v0(struct loc_database* db,
+ FILE* f, const struct loc_database_header_v0* header) {
+ off_t as_offset = be32toh(header->as_offset);
+ size_t as_length = be32toh(header->as_length);
+
+ DEBUG(db->ctx, "Reading AS section from %jd (%zu bytes)\n", as_offset, as_length);
+
+ if (as_length > 0) {
+ db->as_v0 = mmap(NULL, as_length, PROT_READ,
+ MAP_SHARED, fileno(f), as_offset);
+
+ if (db->as_v0 == MAP_FAILED)
+ return -errno;
+ }
+
+ db->as_count = as_length / sizeof(*db->as_v0);
+
+ INFO(db->ctx, "Read %zu ASes from the database\n", db->as_count);
+
+ return 0;
+}
+
+static int loc_database_read_network_nodes_section_v0(struct loc_database* db,
+ FILE* f, const struct loc_database_header_v0* header) {
+ off_t network_nodes_offset = be32toh(header->network_tree_offset);
+ size_t network_nodes_length = be32toh(header->network_tree_length);
+
+ DEBUG(db->ctx, "Reading network nodes section from %jd (%zu bytes)\n",
+ network_nodes_offset, network_nodes_length);
+
+ if (network_nodes_length > 0) {
+ db->network_nodes_v0 = mmap(NULL, network_nodes_length, PROT_READ,
+ MAP_SHARED, fileno(f), network_nodes_offset);
+
+ if (db->network_nodes_v0 == MAP_FAILED)
+ return -errno;
+ }
+
+ db->network_nodes_count = network_nodes_length / sizeof(*db->network_nodes_v0);
+
+ INFO(db->ctx, "Read %zu network nodes from the database\n", db->network_nodes_count);
+
+ return 0;
+}
+
+static int loc_database_read_networks_section_v0(struct loc_database* db,
+ FILE* f, const struct loc_database_header_v0* header) {
+ off_t networks_offset = be32toh(header->network_data_offset);
+ size_t networks_length = be32toh(header->network_data_length);
+
+ DEBUG(db->ctx, "Reading networks section from %jd (%zu bytes)\n",
+ networks_offset, networks_length);
+
+ if (networks_length > 0) {
+ db->networks_v0 = mmap(NULL, networks_length, PROT_READ,
+ MAP_SHARED, fileno(f), networks_offset);
+
+ if (db->networks_v0 == MAP_FAILED)
+ return -errno;
+ }
+
+ db->networks_count = networks_length / sizeof(*db->networks_v0);
+
+ INFO(db->ctx, "Read %zu networks from the database\n", db->networks_count);
+
+ return 0;
+}
+
+static int loc_database_read_header_v0(struct loc_database* db, FILE* f) {
+ struct loc_database_header_v0 header;
+
+ // Read from file
+ size_t size = fread(&header, 1, sizeof(header), f);
+
+ if (size < sizeof(header)) {
+ ERROR(db->ctx, "Could not read enough data for header\n");
+ return -ENOMSG;
+ }
+
+ // Copy over data
+ db->created_at = be64toh(header.created_at);
+ db->vendor = be32toh(header.vendor);
+ db->description = be32toh(header.description);
+
+ // Open pool
+ off_t pool_offset = be32toh(header.pool_offset);
+ size_t pool_length = be32toh(header.pool_length);
+
+ int r = loc_stringpool_open(db->ctx, &db->pool,
+ f, pool_length, pool_offset);
+ if (r)
+ return r;
+
+ // AS section
+ r = loc_database_read_as_section_v0(db, f, &header);
+ if (r)
+ return r;
+
+ // Network Nodes
+ r = loc_database_read_network_nodes_section_v0(db, f, &header);
+ if (r)
+ return r;
+
+ // Networks
+ r = loc_database_read_networks_section_v0(db, f, &header);
+ if (r)
+ return r;
+
+ return 0;
+}
+
+static int loc_database_read_header(struct loc_database* db, FILE* f) {
+ switch (db->version) {
+ case 0:
+ return loc_database_read_header_v0(db, f);
+
+ default:
+ ERROR(db->ctx, "Incompatible database version: %u\n", db->version);
+ return 1;
+ }
+}
+
+static int loc_database_read(struct loc_database* db, FILE* f) {
+ clock_t start = clock();
+
+ // Read magic bytes
+ int r = loc_database_read_magic(db, f);
+ if (r)
+ return r;
+
+ // Read the header
+ r = loc_database_read_header(db, f);
+ if (r)
+ return r;
+
+ clock_t end = clock();
+
+ INFO(db->ctx, "Opened database in %.8fs\n",
+ (double)(end - start) / CLOCKS_PER_SEC);
+
+ return 0;
+}
+
+LOC_EXPORT int loc_database_new(struct loc_ctx* ctx, struct loc_database** database, FILE* f) {
+ // Fail on invalid file handle
+ if (!f)
+ return -EINVAL;
-LOC_EXPORT int loc_database_new(struct loc_ctx* ctx, struct loc_database** database, size_t pool_size) {
struct loc_database* db = calloc(1, sizeof(*db));
if (!db)
return -ENOMEM;
db->ctx = loc_ref(ctx);
db->refcount = 1;
- DEBUG(db->ctx, "Database allocated at %p\n", db);
+ DEBUG(db->ctx, "Database object allocated at %p\n", db);
- // Create string pool
- int r = loc_stringpool_new(db->ctx, &db->pool, pool_size);
+ int r = loc_database_read(db, f);
if (r) {
loc_database_unref(db);
return r;
return 0;
}
-LOC_EXPORT int loc_database_open(struct loc_ctx* ctx, struct loc_database** database, FILE* f) {
- int r = loc_database_new(ctx, database, 0);
- if (r)
- return r;
-
- return loc_database_read(*database, f);
-}
-
LOC_EXPORT struct loc_database* loc_database_ref(struct loc_database* db) {
db->refcount++;
}
static void loc_database_free(struct loc_database* db) {
+ int r;
+
DEBUG(db->ctx, "Releasing database %p\n", db);
- // Remove references to all ASes
- if (db->as) {
- for (unsigned int i = 0; i < db->as_count; i++) {
- loc_as_unref(db->as[i]);
- }
- free(db->as);
+ // Removing all ASes
+ if (db->as_v0) {
+ r = munmap(db->as_v0, db->as_count * sizeof(*db->as_v0));
+ if (r)
+ ERROR(db->ctx, "Could not unmap AS section: %s\n", strerror(errno));
+ }
+
+ // Remove mapped network sections
+ if (db->networks_v0) {
+ r = munmap(db->networks_v0, db->networks_count * sizeof(*db->networks_v0));
+ if (r)
+ ERROR(db->ctx, "Could not unmap networks section: %s\n", strerror(errno));
+ }
+
+ // Remove mapped network nodes section
+ if (db->network_nodes_v0) {
+ r = munmap(db->network_nodes_v0, db->network_nodes_count * sizeof(*db->network_nodes_v0));
+ if (r)
+ ERROR(db->ctx, "Could not unmap network nodes section: %s\n", strerror(errno));
}
loc_stringpool_unref(db->pool);
return NULL;
}
-LOC_EXPORT const char* loc_database_get_vendor(struct loc_database* db) {
- return loc_stringpool_get(db->pool, db->vendor);
+LOC_EXPORT time_t loc_database_created_at(struct loc_database* db) {
+ return db->created_at;
}
-LOC_EXPORT int loc_database_set_vendor(struct loc_database* db, const char* vendor) {
- // Add the string to the string pool
- off_t offset = loc_stringpool_add(db->pool, vendor);
- if (offset < 0)
- return offset;
-
- db->vendor = offset;
- return 0;
+LOC_EXPORT const char* loc_database_get_vendor(struct loc_database* db) {
+ return loc_stringpool_get(db->pool, db->vendor);
}
LOC_EXPORT const char* loc_database_get_description(struct loc_database* db) {
return loc_stringpool_get(db->pool, db->description);
}
-LOC_EXPORT int loc_database_set_description(struct loc_database* db, const char* description) {
- // Add the string to the string pool
- off_t offset = loc_stringpool_add(db->pool, description);
- if (offset < 0)
- return offset;
-
- db->description = offset;
- return 0;
-}
-
LOC_EXPORT size_t loc_database_count_as(struct loc_database* db) {
return db->as_count;
}
-static int loc_database_has_as(struct loc_database* db, struct loc_as* as) {
- for (unsigned int i = 0; i < db->as_count; i++) {
- if (loc_as_cmp(as, db->as[i]) == 0)
- return i;
+// Returns the AS at position pos
+static int loc_database_fetch_as(struct loc_database* db, struct loc_as** as, off_t pos) {
+ if ((size_t)pos >= db->as_count)
+ return -EINVAL;
+
+ DEBUG(db->ctx, "Fetching AS at position %jd\n", pos);
+
+ int r;
+ switch (db->version) {
+ case 0:
+ r = loc_as_new_from_database_v0(db->ctx, db->pool, as, db->as_v0 + pos);
+ break;
+
+ default:
+ return -1;
}
- return -1;
-}
+ if (r == 0) {
+ DEBUG(db->ctx, "Got AS%u\n", loc_as_get_number(*as));
+ }
-static int __loc_as_cmp(const void* as1, const void* as2) {
- return loc_as_cmp(*(struct loc_as**)as1, *(struct loc_as**)as2);
+ return r;
}
-static void loc_database_sort_ases(struct loc_database* db) {
- qsort(db->as, db->as_count, sizeof(*db->as), __loc_as_cmp);
-}
+// Performs a binary search to find the AS in the list
+LOC_EXPORT int loc_database_get_as(struct loc_database* db, struct loc_as** as, uint32_t number) {
+ off_t lo = 0;
+ off_t hi = db->as_count - 1;
-static struct loc_as* __loc_database_add_as(struct loc_database* db, struct loc_as* as) {
- // Check if AS exists already
- int i = loc_database_has_as(db, as);
- if (i >= 0) {
- loc_as_unref(as);
+ // Save start time
+ clock_t start = clock();
- // Select already existing AS
- as = db->as[i];
+ while (lo <= hi) {
+ off_t i = (lo + hi) / 2;
- return loc_as_ref(as);
- }
+ // Fetch AS in the middle between lo and hi
+ int r = loc_database_fetch_as(db, as, i);
+ if (r)
+ return r;
- db->as_count++;
+ // Check if this is a match
+ uint32_t as_number = loc_as_get_number(*as);
+ if (as_number == number) {
+ clock_t end = clock();
- // Make space for the new entry
- db->as = realloc(db->as, sizeof(*db->as) * db->as_count);
+ // Log how fast this has been
+ DEBUG(db->ctx, "Found AS%u in %.8fs\n", as_number,
+ (double)(end - start) / CLOCKS_PER_SEC);
- // Add the new entry at the end
- db->as[db->as_count - 1] = loc_as_ref(as);
+ return 0;
+ }
- // Sort everything
- loc_database_sort_ases(db);
+ // If it wasn't, we release the AS and
+ // adjust our search pointers
+ loc_as_unref(*as);
- return as;
-}
+ if (as_number < number) {
+ lo = i + 1;
+ } else
+ hi = i - 1;
+ }
-LOC_EXPORT struct loc_as* loc_database_add_as(struct loc_database* db, uint32_t number) {
- struct loc_as* as;
- int r = loc_as_new(db->ctx, db->pool, &as, number);
- if (r)
- return NULL;
+ // Nothing found
+ *as = NULL;
- return __loc_database_add_as(db, as);
+ return 1;
}
-static int loc_database_read_magic(struct loc_database* db, FILE* f) {
- struct loc_database_magic magic;
-
- // Read from file
- size_t bytes_read = fread(&magic, 1, sizeof(magic), f);
-
- // Check if we have been able to read enough data
- if (bytes_read < sizeof(magic)) {
- ERROR(db->ctx, "Could not read enough data to validate magic bytes\n");
- DEBUG(db->ctx, "Read %zu bytes, but needed %zu\n", bytes_read, sizeof(magic));
- return -ENOMSG;
- }
+// Returns the network at position pos
+static int loc_database_fetch_network(struct loc_database* db, struct loc_network** network, struct in6_addr* address, off_t pos) {
+ if ((size_t)pos >= db->networks_count)
+ return -EINVAL;
- // Compare magic bytes
- if (memcmp(LOC_DATABASE_MAGIC, magic.magic, strlen(LOC_DATABASE_MAGIC)) == 0) {
- DEBUG(db->ctx, "Magic value matches\n");
+ DEBUG(db->ctx, "Fetching network at position %jd\n", pos);
- // Parse version
- db->version = ntohs(magic.version);
- DEBUG(db->ctx, "Database version is %u\n", db->version);
+ int r;
+ switch (db->version) {
+ case 0:
+ r = loc_network_new_from_database_v0(db->ctx, network, address, db->networks_v0 + pos);
+ break;
- return 0;
+ default:
+ return -1;
}
- ERROR(db->ctx, "Database format is not compatible\n");
+ if (r == 0) {
+ char* string = loc_network_str(*network);
+ DEBUG(db->ctx, "Got network %s\n", string);
+ free(string);
+ }
- // Return an error
- return 1;
+ return r;
}
-static int loc_database_read_as_section_v0(struct loc_database* db,
- off_t as_offset, size_t as_length, FILE* f) {
- struct loc_database_as_v0 dbobj;
+static int __loc_database_lookup_leaf_node(struct loc_database* db, const struct in6_addr* address,
+ struct loc_network** network, struct in6_addr* network_address,
+ const struct loc_database_network_node_v0* node) {
+ // Check if this node is a leaf node
+ if (node->zero != htobe32(0xffffffff))
+ return 1;
+
+ DEBUG(db->ctx, "Node is a leaf: %jd\n", node - db->network_nodes_v0);
- // Read from the start of the section
- int r = fseek(f, as_offset, SEEK_SET);
+ // Fetch the network
+ int r = loc_database_fetch_network(db, network,
+ network_address, be32toh(node->one));
if (r)
return r;
- // Read all ASes
- size_t as_count = as_length / sizeof(dbobj);
- for (unsigned int i = 0; i < as_count; i++) {
- size_t bytes_read = fread(&dbobj, 1, sizeof(dbobj), f);
- if (bytes_read < sizeof(dbobj)) {
- ERROR(db->ctx, "Could not read an AS object\n");
- return -ENOMSG;
- }
-
- // Allocate a new AS
- struct loc_as* as;
- r = loc_as_new_from_database_v0(db->ctx, db->pool, &as, &dbobj);
- if (r)
- return r;
+ // Check if the given IP address is inside the network
+ r = loc_network_match_address(*network, address);
+ if (r) {
+ DEBUG(db->ctx, "Searched address is not part of the network\n");
- // Attach it to the database
- as = __loc_database_add_as(db, as);
- loc_as_unref(as);
+ loc_network_unref(*network);
+ *network = NULL;
+ return 1;
}
- INFO(db->ctx, "Read %zu ASes from the database\n", db->as_count);
-
+ // A network was found and the IP address matches
return 0;
}
-static int loc_database_read_header_v0(struct loc_database* db, FILE* f) {
- struct loc_database_header_v0 header;
+// Returns the highest result available
+static int __loc_database_lookup_max(struct loc_database* db, const struct in6_addr* address,
+ struct loc_network** network, struct in6_addr* network_address,
+ const struct loc_database_network_node_v0* node, int level) {
- // Read from file
- size_t size = fread(&header, 1, sizeof(header), f);
+ // If the node is a leaf node, we end here
+ int r = __loc_database_lookup_leaf_node(db, address, network, network_address, node);
+ if (r <= 0)
+ return r;
- if (size < sizeof(header)) {
- ERROR(db->ctx, "Could not read enough data for header\n");
- return -ENOMSG;
+ off_t node_index;
+
+ // Try to go down the ones path first
+ if (node->one) {
+ node_index = be32toh(node->one);
+ in6_addr_set_bit(network_address, level, 1);
+
+ // Check boundaries
+ if (node_index > 0 && (size_t)node_index <= db->network_nodes_count) {
+ r = __loc_database_lookup_max(db, address, network, network_address,
+ db->network_nodes_v0 + node_index, level + 1);
+
+ // Abort when match was found or error
+ if (r <= 0)
+ return r;
+ }
}
- // Copy over data
- db->vendor = ntohl(header.vendor);
- db->description = ntohl(header.description);
+ // ... and if that fails, we try to go down one step on a zero
+ // branch and then try the ones again...
+ if (node->zero) {
+ node_index = be32toh(node->zero);
+ in6_addr_set_bit(network_address, level, 0);
- // Open pool
- off_t pool_offset = ntohl(header.pool_offset);
- size_t pool_length = ntohl(header.pool_length);
+ // Check boundaries
+ if (node_index > 0 && (size_t)node_index <= db->network_nodes_count) {
+ r = __loc_database_lookup_max(db, address, network, network_address,
+ db->network_nodes_v0 + node_index, level + 1);
- int r = loc_stringpool_read(db->pool, f, pool_offset, pool_length);
- if (r)
- return r;
+ // Abort when match was found or error
+ if (r <= 0)
+ return r;
+ }
+ }
- // AS section
- off_t as_offset = ntohl(header.as_offset);
- size_t as_length = ntohl(header.as_length);
+ // End of path
+ return 1;
+}
- r = loc_database_read_as_section_v0(db, as_offset, as_length, f);
- if (r)
+// Searches for an exact match along the path
+static int __loc_database_lookup(struct loc_database* db, const struct in6_addr* address,
+ struct loc_network** network, struct in6_addr* network_address,
+ const struct loc_database_network_node_v0* node, int level) {
+ // If the node is a leaf node, we end here
+ int r = __loc_database_lookup_leaf_node(db, address, network, network_address, node);
+ if (r <= 0)
return r;
- return 0;
-}
+ off_t node_index;
-static int loc_database_read_header(struct loc_database* db, FILE* f) {
- switch (db->version) {
- case 0:
- return loc_database_read_header_v0(db, f);
+ // Follow the path
+ int bit = in6_addr_get_bit(address, level);
+ in6_addr_set_bit(network_address, level, bit);
- default:
- ERROR(db->ctx, "Incompatible database version: %u\n", db->version);
- return 1;
+ if (bit == 0)
+ node_index = be32toh(node->zero);
+ else
+ node_index = be32toh(node->one);
+
+ // If we point back to root, the path ends here
+ if (node_index == 0) {
+ DEBUG(db->ctx, "Tree ends here\n");
+ return 1;
}
-}
-LOC_EXPORT int loc_database_read(struct loc_database* db, FILE* f) {
- int r = fseek(f, 0, SEEK_SET);
- if (r)
- return r;
+ // Check boundaries
+ if ((size_t)node_index >= db->network_nodes_count)
+ return -EINVAL;
- // Read magic bytes
- r = loc_database_read_magic(db, f);
- if (r)
- return r;
+ // Move on to the next node
+ r = __loc_database_lookup(db, address, network, network_address,
+ db->network_nodes_v0 + node_index, level + 1);
- // Read the header
- r = loc_database_read_header(db, f);
- if (r)
+ // End here if a result was found
+ if (r == 0)
return r;
- return 0;
-}
+ // Raise any errors
+ else if (r < 0)
+ return r;
-static void loc_database_make_magic(struct loc_database* db, struct loc_database_magic* magic) {
- // Copy magic bytes
- for (unsigned int i = 0; i < strlen(LOC_DATABASE_MAGIC); i++)
- magic->magic[i] = LOC_DATABASE_MAGIC[i];
+ DEBUG(db->ctx, "Could not find an exact match at %u\n", level);
- // Set version
- magic->version = htons(LOC_DATABASE_VERSION);
+ // If nothing was found, we have to search for an inexact match
+ return __loc_database_lookup_max(db, address, network, network_address, node, level);
}
-LOC_EXPORT int loc_database_write(struct loc_database* db, FILE* f) {
- struct loc_database_magic magic;
- loc_database_make_magic(db, &magic);
-
- // Make the header
- struct loc_database_header_v0 header;
- header.vendor = htonl(db->vendor);
- header.description = htonl(db->description);
-
- int r;
- off_t offset = 0;
-
- // Start writing at the beginning of the file
- r = fseek(f, 0, SEEK_SET);
- if (r)
- return r;
+LOC_EXPORT int loc_database_lookup(struct loc_database* db,
+ struct in6_addr* address, struct loc_network** network) {
+ struct in6_addr network_address;
+ memset(&network_address, 0, sizeof(network_address));
- // Write the magic
- offset += fwrite(&magic, 1, sizeof(magic), f);
+ *network = NULL;
- // Skip the space we need to write the header later
- r = fseek(f, sizeof(header), SEEK_CUR);
- if (r) {
- DEBUG(db->ctx, "Could not seek to position after header\n");
- return r;
- }
- offset += sizeof(header);
+ // Save start time
+ clock_t start = clock();
- // Write all ASes
- header.as_offset = htonl(offset);
+ int r = __loc_database_lookup(db, address, network, &network_address,
+ db->network_nodes_v0, 0);
- struct loc_database_as_v0 dbas;
- for (unsigned int i = 0; i < db->as_count; i++) {
- // Convert AS into database format
- loc_as_to_database_v0(db->as[i], &dbas);
+ clock_t end = clock();
- // Write to disk
- offset += fwrite(&dbas, 1, sizeof(dbas), f);
- }
- header.as_length = htonl(db->as_count * sizeof(dbas));
+ // Log how fast this has been
+ DEBUG(db->ctx, "Executed network search in %.8fs\n",
+ (double)(end - start) / CLOCKS_PER_SEC);
- // Save the offset of the pool section
- DEBUG(db->ctx, "Pool starts at %jd bytes\n", offset);
- header.pool_offset = htonl(offset);
+ return r;
+}
- // Size of the pool
- size_t pool_length = loc_stringpool_write(db->pool, f);
- DEBUG(db->ctx, "Pool has a length of %zu bytes\n", pool_length);
- header.pool_length = htonl(pool_length);
+LOC_EXPORT int loc_database_lookup_from_string(struct loc_database* db,
+ const char* string, struct loc_network** network) {
+ struct in6_addr address;
- // Write the header
- r = fseek(f, sizeof(magic), SEEK_SET);
+ int r = loc_parse_address(db->ctx, string, &address);
if (r)
return r;
- offset += fwrite(&header, 1, sizeof(header), f);
-
- return 0;
+ return loc_database_lookup(db, &address, network);
}
projects / people / ms / libloc.git / blobdiff