/**
* Authenticates a connection
*
* Returns 1 when it worked, or 0 when it didn't - with the error_message set.
*/
int mongo_connection_authenticate(mongo_con_manager *manager, mongo_connection *con, char *database, char *username, char *password, char *nonce, char **error_message)
{
mcon_str *packet;
char *data_buffer, *errmsg;
double ok;
char *ptr;
char *salted;
int length;
char *hash, *key;
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "authenticate: start");
/* Calculate hash=md5(${username}:mongo:${password}) */
length = strlen(username) + 7 + strlen(password) + 1;
salted = malloc(length);
snprintf(salted, length, "%s:mongo:%s", username, password);
hash = mongo_util_md5_hex(salted, length - 1); /* -1 to chop off \0 */
free(salted);
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "authenticate: hash=md5(%s:mongo:%s) = %s", username, password, hash);
/* Calculate key=md5(${nonce}${username}${hash}) */
length = strlen(nonce) + strlen(username) + strlen(hash) + 1;
salted = malloc(length);
snprintf(salted, length, "%s%s%s", nonce, username, hash);
key = mongo_util_md5_hex(salted, length - 1); /* -1 to chop off \0 */
free(salted);
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "authenticate: key=md5(%s%s%s) = %s", nonce, username, hash, key);
packet = bson_create_authenticate_packet(con, database, username, nonce, key);
free(hash);
free(key);
if (!mongo_connect_send_packet(manager, con, packet, &data_buffer, error_message)) {
free(data_buffer);
return 0;
}
/* Find data fields */
ptr = data_buffer + sizeof(int32_t); /* Skip the length */
/* Find errmsg */
if (bson_find_field_as_double(ptr, "ok", &ok)) {
if (ok > 0) {
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "authentication successful");
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_WARN, "authentication failed");
}
}
if (bson_find_field_as_string(ptr, "errmsg", &errmsg)) {
*error_message = malloc(256);
snprintf(*error_message, 256, "Authentication failed on database '%s' with username '%s': %s", database, username, errmsg);
free(data_buffer);
return 0;
}
free(data_buffer);
return 1;
}
/**
* Sends a ping command to the server and stores the result.
*
* Returns 1 when it worked, and 0 when an error was encountered.
*/
int mongo_connection_ping(mongo_con_manager *manager, mongo_connection *con, char **error_message)
{
mcon_str *packet;
struct timeval start, end;
char *data_buffer;
gettimeofday(&start, NULL);
if ((con->last_ping + manager->ping_interval) > start.tv_sec) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "is_ping: skipping: last ran at %ld, now: %ld, time left: %ld", con->last_ping, start.tv_sec, con->last_ping + manager->ping_interval - start.tv_sec);
return 2;
}
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "is_ping: pinging %s", con->hash);
packet = bson_create_ping_packet(con);
if (!mongo_connect_send_packet(manager, con, packet, &data_buffer, error_message)) {
return 0;
}
gettimeofday(&end, NULL);
free(data_buffer);
con->last_ping = end.tv_sec;
con->ping_ms = (end.tv_sec - start.tv_sec) * 1000 + (end.tv_usec - start.tv_usec) / 1000;
if (con->ping_ms < 0) { /* some clocks do weird stuff */
con->ping_ms = 0;
}
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "is_ping: last pinged at %ld; time: %dms", con->last_ping, con->ping_ms);
return 1;
}
/**
* Sends a getnonce command to the server for authentication
*
* Returns the nonsense when it worked, or NULL if it didn't.
*/
char *mongo_connection_getnonce(mongo_con_manager *manager, mongo_connection *con, char **error_message)
{
mcon_str *packet;
char *data_buffer;
char *ptr;
char *nonce;
char *retval = NULL;
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "getnonce: start");
packet = bson_create_getnonce_packet(con);
if (!mongo_connect_send_packet(manager, con, packet, &data_buffer, error_message)) {
return NULL;
}
/* Find data fields */
ptr = data_buffer + sizeof(int32_t); /* Skip the length */
/* Find getnonce */
if (bson_find_field_as_string(ptr, "nonce", &nonce)) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "getnonce: found nonce '%s'", nonce);
} else {
*error_message = strdup("Couldn't find the nonce field");
free(data_buffer);
return NULL;
}
retval = strdup(nonce);
free(data_buffer);
return retval;
}
/**
* Sends a ping command to the server and stores the result.
*
* Returns 1 when it worked, and 0 when an error was encountered.
*/
int mongo_connection_ping(mongo_con_manager *manager, mongo_connection *con)
{
mcon_str *packet;
char *error_message = NULL;
struct timeval start, end;
char *data_buffer;
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "is_ping: start");
packet = bson_create_ping_packet(con);
gettimeofday(&start, NULL);
if (!mongo_connect_send_packet(manager, con, packet, &data_buffer, (char **) &error_message)) {
return 0;
}
gettimeofday(&end, NULL);
free(data_buffer);
con->last_ping = end.tv_sec;
con->ping_ms = (end.tv_sec - start.tv_sec) * 1000 + (end.tv_usec - start.tv_usec) / 1000;
if (con->ping_ms < 0) { /* some clocks do weird stuff */
con->ping_ms = 0;
}
mongo_manager_log(manager, MLOG_CON, MLOG_WARN, "is_ping: last pinged at %ld; time: %dms", con->last_ping, con->ping_ms);
return 1;
}
/**
* Sends a ping command to the server and stores the result.
*
* Returns 1 when it worked, and 0 when an error was encountered.
*/
int mongo_connection_ping(mongo_con_manager *manager, mongo_connection *con, mongo_server_options *options, char **error_message)
{
mcon_str *packet;
struct timeval start, end;
char *data_buffer;
/* If we haven't hit the ping_interval yet, then there is no need to do a roundtrip to the server */
if (!mongo_connection_ping_check(manager, con->last_ping, &start)) {
return 1;
}
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "is_ping: pinging %s", con->hash);
packet = bson_create_ping_packet(con);
if (!mongo_connect_send_packet(manager, con, options, packet, &data_buffer, error_message)) {
return 0;
}
gettimeofday(&end, NULL);
free(data_buffer);
con->last_ping = end.tv_sec;
con->ping_ms = (end.tv_sec - start.tv_sec) * 1000 + (end.tv_usec - start.tv_usec) / 1000;
if (con->ping_ms < 0) { /* some clocks do weird stuff */
con->ping_ms = 0;
}
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "is_ping: last pinged at %ld; time: %dms", con->last_ping, con->ping_ms);
return 1;
}
/**
* Sends the db.authenticate() command packet
*
* Returns:
* 0: when it didn't work - with the error_message set (extracted from the 'errmsg' field if possible)
* 1: when it worked
*/
int mongo_connection_authenticate_cmd(mongo_con_manager *manager, mongo_connection *con, mongo_server_options *options, char *database, char *username, mcon_str *packet, char **error_message)
{
char *data_buffer, *errmsg;
double ok;
char *ptr;
if (!mongo_connect_send_packet(manager, con, options, packet, &data_buffer, error_message)) {
return 0;
}
/* Find data fields */
ptr = data_buffer + sizeof(int32_t); /* Skip the length */
/* Find errmsg */
if (bson_find_field_as_double(ptr, "ok", &ok)) {
if (ok > 0) {
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "authentication successful");
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_WARN, "authentication failed");
}
}
if (bson_find_field_as_string(ptr, "errmsg", &errmsg)) {
*error_message = malloc(256);
snprintf(*error_message, 256, "Authentication failed on database '%s' with username '%s': %s", database, username, errmsg);
free(data_buffer);
return 0;
}
free(data_buffer);
return 1;
}
int mongo_connection_authenticate_saslcontinue(mongo_con_manager *manager, mongo_connection *con, mongo_server_options *options, mongo_server_def *server_def, int32_t conversation_id, char *payload, int payload_len, char **out_payload, int *out_payload_len, unsigned char *done, char **error_message)
{
mcon_str *packet;
char *data_buffer;
char *ptr;
double ok;
char *errmsg;
int32_t out_conversation_id;
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "connection_authenticate_saslcontinue: continuing SASL authentication to '%s'", con->hash);
packet = bson_create_saslcontinue_packet(con, conversation_id, payload, payload_len);
if (!mongo_connect_send_packet(manager, con, options, packet, &data_buffer, error_message)) {
return 0;
}
/* Find data fields */
ptr = data_buffer + sizeof(int32_t); /* Skip the length */
if (bson_find_field_as_double(ptr, "ok", &ok)) {
if (ok > 0) {
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "SASL continue successful");
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_WARN, "SASL continue failed");
if (bson_find_field_as_string(ptr, "errmsg", &errmsg)) {
int errlen = strlen("SASL Authentication failed on database '': ") + strlen(server_def->db) + strlen(errmsg);
*error_message = malloc(errlen);
snprintf(*error_message, errlen, "SASL Authentication failed on database '%s': %s", server_def->db, errmsg);
} else {
int errlen = strlen("SASL Authentication failed on database ''") + strlen(server_def->db);
*error_message = malloc(errlen);
snprintf(*error_message, errlen, "SASL Authentication failed on database '%s'", server_def->db);
}
free(data_buffer);
return 0;
}
}
if (bson_find_field_as_int32(ptr, "conversationId", &out_conversation_id)) {
if (out_conversation_id != conversation_id) {
mongo_manager_log(manager, MLOG_CON, MLOG_WARN, "SASL continue failed: Got wrong conversation_id back! Expected %d but got %d", conversation_id, out_conversation_id);
free(data_buffer);
return 0;
}
bson_find_field_as_stringl(ptr, "payload", out_payload, out_payload_len, 1);
bson_find_field_as_bool(ptr, "done", done);
}
free(data_buffer);
return (int)ok;
}
int mongo_connection_authenticate_saslstart(mongo_con_manager *manager, mongo_connection *con, mongo_server_options *options, mongo_server_def *server_def, char *mechanism, char *payload, unsigned int payload_len, char **out_payload, int *out_payload_len, int32_t *out_conversation_id, char **error_message)
{
mcon_str *packet;
char *data_buffer;
char *ptr;
char *smechanism;
double ok;
char *errmsg;
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "connection_authenticate_sasl: Starting SASL authentication process to '%s'", con->hash);
if (server_def->mechanism == MONGO_AUTH_MECHANISM_MONGODB_CR) {
*error_message = strdup("Invalid authentication mechanism. Expected SASL mechanism, got MongoDB-CR");
return 0;
}
packet = bson_create_saslstart_packet(con, server_def->authdb ? server_def->authdb : server_def->db, mechanism, payload, payload_len);
if (!mongo_connect_send_packet(manager, con, options, packet, &data_buffer, error_message)) {
return 0;
}
/* Find data fields */
ptr = data_buffer + sizeof(int32_t); /* Skip the length */
if (bson_find_field_as_double(ptr, "ok", &ok)) {
if (ok > 0) {
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "SASL request successful");
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_WARN, "SASL request failed");
if (bson_find_field_as_string(ptr, "errmsg", &errmsg)) {
*error_message = malloc(256);
snprintf(*error_message, 256, "SASL Authentication failed on database '%s': %s", server_def->db, errmsg);
} else {
*error_message = "SASL Authentication failed";
}
if (bson_find_field_as_document(ptr, "supportedMechanisms", (char**) &smechanism)) {
/* TODO: Retrieve a list of supportedMechanisms and return it somehow */
}
free(data_buffer);
return 0;
}
}
if (bson_find_field_as_int32(ptr, "conversationId", out_conversation_id)) {
bson_find_field_as_stringl(ptr, "payload", out_payload, out_payload_len, 1);
}
free(data_buffer);
return 1;
}
/* Sends an buildInfo command to the server to find server version
*
* Returns 1 when it worked, and 0 when an error was encountered. */
int mongo_connection_get_server_version(mongo_con_manager *manager, mongo_connection *con, mongo_server_options *options, char **error_message)
{
mcon_str *packet;
char *data_buffer;
char *ptr;
char *version_array;
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "get_server_version: start");
packet = bson_create_buildinfo_packet(con);
if (!mongo_connect_send_packet(manager, con, options, packet, &data_buffer, error_message)) {
return 0;
}
/* Find data fields */
ptr = data_buffer + sizeof(int32_t); /* Skip the length */
/* Find read preferences tags */
if (bson_find_field_as_array(ptr, "versionArray", (char**) &version_array)) {
char *it;
it = version_array;
if (bson_array_find_next_int32(&it, NULL, &con->version.major)) {
if (bson_array_find_next_int32(&it, NULL, &con->version.minor)) {
if (bson_array_find_next_int32(&it, NULL, &con->version.mini)) {
if (bson_array_find_next_int32(&it, NULL, &con->version.build)) {
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "get_server_version: server version: %d.%d.%d (%d)", con->version.major, con->version.minor, con->version.mini, con->version.build);
}
}
}
}
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_WARN, "get_server_flags: can't find version information, defaulting to %d.%d.%d (%d)", con->version.major, con->version.minor, con->version.mini, con->version.build);
}
free(data_buffer);
return 1;
}
/**
* Sends an ismaster command to the server to find server flags
*
* Returns 1 when it worked, and 0 when an error was encountered.
*/
int mongo_connection_get_server_flags(mongo_con_manager *manager, mongo_connection *con, char **error_message)
{
mcon_str *packet;
int32_t max_bson_size = 0;
char *data_buffer;
char *ptr;
char *tags;
char *msg; /* If set and its value is "isdbgrid", it signals we connected to a mongos */
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "get_server_flags: start");
packet = bson_create_ismaster_packet(con);
if (!mongo_connect_send_packet(manager, con, packet, &data_buffer, error_message)) {
return 0;
}
/* Find data fields */
ptr = data_buffer + sizeof(int32_t); /* Skip the length */
/* Find max bson size */
if (bson_find_field_as_int32(ptr, "maxBsonObjectSize", &max_bson_size)) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "get_server_flags: setting maxBsonObjectSize to %d", max_bson_size);
con->max_bson_size = max_bson_size;
} else {
*error_message = strdup("Couldn't find the maxBsonObjectSize field");
free(data_buffer);
return 0;
}
/* Find msg and whether it contains "isdbgrid" */
if (bson_find_field_as_string(ptr, "msg", (char**) &msg)) {
if (strcmp(msg, "isdbgrid") == 0) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "get_server_flags: msg contains 'isdbgrid' - we're connected to a mongos");
con->connection_type = MONGO_NODE_MONGOS;
}
}
/* Find read preferences tags */
con->tag_count = 0;
con->tags = NULL;
if (bson_find_field_as_document(ptr, "tags", (char**) &tags)) {
char *it, *name, *value;
int length;
it = tags;
while (bson_array_find_next_string(&it, &name, &value)) {
con->tags = realloc(con->tags, (con->tag_count + 1) * sizeof(char*));
length = strlen(name) + strlen(value) + 2;
con->tags[con->tag_count] = malloc(length);
snprintf(con->tags[con->tag_count], length, "%s:%s", name, value);
free(name);
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "get_server_flags: added tag %s", con->tags[con->tag_count]);
con->tag_count++;
}
}
free(data_buffer);
return 1;
}
/**
* Sends an ismaster command to the server and returns an array of new
* connectable nodes
*
* Returns:
* 0: when an error occurred
* 1: when is master was run and worked
* 2: when is master wasn't run due to the time-out limit
* 3: when it all worked, but we need to remove the seed host (due to its name
* not being what the server thought it is) - in that case, the server in
* the last argument is changed
*/
int mongo_connection_ismaster(mongo_con_manager *manager, mongo_connection *con, char **repl_set_name, int *nr_hosts, char ***found_hosts, char **error_message, mongo_server_def *server)
{
mcon_str *packet;
char *data_buffer;
char *set = NULL; /* For replicaset in return */
char *hosts, *ptr, *string;
unsigned char ismaster = 0, arbiter = 0;
char *connected_name, *we_think_we_are;
struct timeval now;
int retval = 1;
gettimeofday(&now, NULL);
if ((con->last_ismaster + manager->ismaster_interval) > now.tv_sec) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: skipping: last ran at %ld, now: %ld, time left: %ld", con->last_ismaster, now.tv_sec, con->last_ismaster + manager->ismaster_interval - now.tv_sec);
return 2;
}
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "ismaster: start");
packet = bson_create_ismaster_packet(con);
if (!mongo_connect_send_packet(manager, con, packet, &data_buffer, error_message)) {
return 0;
}
/* Find data fields */
ptr = data_buffer + sizeof(int32_t); /* Skip the length */
/* We find out whether the machine we connected too, is actually the
* one we thought we were connecting too */
if (!bson_find_field_as_string(ptr, "me", &connected_name)) {
struct mcon_str *tmp;
mcon_str_ptr_init(tmp);
mcon_str_add(tmp, "Host does not seem to be a replicaset member (", 0);
mcon_str_add(tmp, mongo_server_hash_to_server(con->hash), 1);
mcon_str_add(tmp, ")", 0);
*error_message = strdup(tmp->d);
mcon_str_ptr_dtor(tmp);
mongo_manager_log(manager, MLOG_CON, MLOG_WARN, *error_message);
free(data_buffer);
return 0;
}
we_think_we_are = mongo_server_hash_to_server(con->hash);
if (strcmp(connected_name, we_think_we_are) == 0) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: the server name matches what we thought it'd be (%s).", we_think_we_are);
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_WARN, "ismaster: the server name (%s) did not match with what we thought it'd be (%s).", connected_name, we_think_we_are);
/* We reset the name as the server responded with a different name than
* what we thought it was */
free(server->host);
server->host = mcon_strndup(connected_name, strchr(connected_name, ':') - connected_name);
server->port = atoi(strchr(connected_name, ':') + 1);
retval = 3;
}
free(we_think_we_are);
/* Do replica set name test */
bson_find_field_as_string(ptr, "setName", &set);
if (!set) {
char *errmsg = NULL;
bson_find_field_as_string(ptr, "errmsg", &errmsg);
if (errmsg) {
*error_message = strdup(errmsg);
} else {
*error_message = strdup("Not a replicaset member");
}
free(data_buffer);
return 0;
} else if (*repl_set_name) {
if (strcmp(set, *repl_set_name) != 0) {
struct mcon_str *tmp;
mcon_str_ptr_init(tmp);
mcon_str_add(tmp, "Host does not match replicaset name. Expected: ", 0);
mcon_str_add(tmp, *repl_set_name, 0);
mcon_str_add(tmp, "; Found: ", 0);
mcon_str_add(tmp, set, 0);
*error_message = strdup(tmp->d);
mcon_str_ptr_dtor(tmp);
free(data_buffer);
return 0;
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: the found replicaset name matches the expected one (%s).", set);
}
} else if (*repl_set_name == NULL) {
/* This can happen, in case the replicaset name was not given, but just
* bool(true) (or string("1")) in the connection options. */
mongo_manager_log(manager, MLOG_CON, MLOG_WARN, "ismaster: the replicaset name is not set, so we're using %s.", set);
*repl_set_name = strdup(set);
}
/* If the server definition has not set the repl_set_name member yet, set it here */
if (!server->repl_set_name) {
server->repl_set_name = strdup(set);
}
/* Check for flags */
bson_find_field_as_bool(ptr, "ismaster", &ismaster);
bson_find_field_as_bool(ptr, "arbiterOnly", &arbiter);
/* Find all hosts */
bson_find_field_as_array(ptr, "hosts", &hosts);
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "ismaster: set name: %s, ismaster: %d, is_arbiter: %d", set, ismaster, arbiter);
*nr_hosts = 0;
ptr = hosts;
while (bson_array_find_next_string(&ptr, NULL, &string)) {
(*nr_hosts)++;
*found_hosts = realloc(*found_hosts, (*nr_hosts) * sizeof(char*));
(*found_hosts)[*nr_hosts-1] = strdup(string);
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "found host: %s", string);
}
/* Set connection type depending on flags */
if (ismaster) {
con->connection_type = MONGO_NODE_PRIMARY;
} else if (arbiter) {
con->connection_type = MONGO_NODE_ARBITER;
} else {
con->connection_type = MONGO_NODE_SECONDARY;
} /* TODO: case for mongos */
free(data_buffer);
con->last_ismaster = now.tv_sec;
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "ismaster: last ran at %ld", con->last_ismaster);
return retval;
}
/* Sends an ismaster command to the server and returns an array of new
* connectable nodes
*
* Returns:
* 0: when an error occurred
* 1: when is master was run and worked
* 2: when is master wasn't run due to the time-out limit
* 3: when it all worked, but we need to remove the seed host (due to its name
* not being what the server thought it is) - in that case, the server in
* the last argument is changed
* 4: when the call worked, but wasn't within our supported wire version range */
int mongo_connection_ismaster(mongo_con_manager *manager, mongo_connection *con, mongo_server_options *options, char **repl_set_name, int *nr_hosts, char ***found_hosts, char **error_message, mongo_server_def *server)
{
mcon_str *packet;
char *data_buffer;
int32_t max_bson_size = 0, max_message_size = 0, max_write_batch_size = 0;
int32_t min_wire_version = 0, max_wire_version = 0;
char *set = NULL; /* For replicaset in return */
char *hosts, *passives = NULL, *ptr, *string;
char *msg; /* If set and its value is "isdbgrid", it signals we connected to a mongos */
unsigned char ismaster = 0, secondary = 0, arbiter = 0;
char *connected_name, *we_think_we_are;
char *tags;
struct timeval now;
int retval = 1;
gettimeofday(&now, NULL);
if (((server ? con->last_replcheck : con->last_ismaster) + manager->ismaster_interval) > now.tv_sec) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: skipping: last ran at %ld, now: %ld, time left: %ld", con->last_ismaster, now.tv_sec, con->last_ismaster + manager->ismaster_interval - now.tv_sec);
return 2;
}
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "ismaster: start");
packet = bson_create_ismaster_packet(con);
if (!mongo_connect_send_packet(manager, con, options, packet, &data_buffer, error_message)) {
return 0;
}
/* Find data fields */
ptr = data_buffer + sizeof(int32_t); /* Skip the length */
/* Find [min|max]WireVersion */
if (bson_find_field_as_int32(ptr, "minWireVersion", &min_wire_version)) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: setting minWireVersion to %d", min_wire_version);
con->min_wire_version = min_wire_version;
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: can't find minWireVersion, defaulting to %d", con->min_wire_version);
}
if (bson_find_field_as_int32(ptr, "maxWireVersion", &max_wire_version)) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: setting maxWireVersion to %d", max_wire_version);
con->max_wire_version = max_wire_version;
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: can't find maxWireVersion, defaulting to %d", con->max_wire_version);
}
if (!manager->supports_wire_version(con->min_wire_version, con->max_wire_version, error_message)) {
/* Error message set by supports_wire_version */
free(data_buffer);
return 4;
}
/* Find max bson size */
if (bson_find_field_as_int32(ptr, "maxBsonObjectSize", &max_bson_size)) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: setting maxBsonObjectSize to %d", max_bson_size);
con->max_bson_size = max_bson_size;
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: can't find maxBsonObjectSize, defaulting to %d", con->max_bson_size);
}
/* Find max message size */
if (bson_find_field_as_int32(ptr, "maxMessageSizeBytes", &max_message_size)) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: setting maxMessageSizeBytes to %d", max_message_size);
con->max_message_size = max_message_size;
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: can't find maxMessageSizeBytes, defaulting to %d", con->max_message_size);
}
/* Find max batch item size */
if (bson_find_field_as_int32(ptr, "maxWriteBatchSize", &max_write_batch_size)) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: setting maxWriteBatchSize to %d", max_write_batch_size);
con->max_write_batch_size = max_write_batch_size;
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: can't find maxWriteBatchSize, defaulting to %d", con->max_write_batch_size);
}
/* Check for flags */
bson_find_field_as_bool(ptr, "ismaster", &ismaster);
bson_find_field_as_bool(ptr, "secondary", &secondary);
bson_find_field_as_bool(ptr, "arbiterOnly", &arbiter);
bson_find_field_as_string(ptr, "setName", &set);
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "ismaster: set name: %s, ismaster: %d, secondary: %d, is_arbiter: %d", set, ismaster, secondary, arbiter);
/* Set connection type depending on flags */
if (ismaster) {
/* Find msg and whether it contains "isdbgrid" */
if (bson_find_field_as_string(ptr, "msg", (char**) &msg) && strcmp(msg, "isdbgrid") == 0) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: msg contains 'isdbgrid' - we're connected to a mongos");
con->connection_type = MONGO_NODE_MONGOS;
} else if(set) {
con->connection_type = MONGO_NODE_PRIMARY;
} else {
con->connection_type = MONGO_NODE_STANDALONE;
}
} else if (secondary) {
con->connection_type = MONGO_NODE_SECONDARY;
} else if (arbiter) {
con->connection_type = MONGO_NODE_ARBITER;
} else if (!set) {
/* If there is no set, we assume this is an "old style" "slave" node */
con->connection_type = MONGO_NODE_SECONDARY;
} else {
con->connection_type = MONGO_NODE_INVALID;
}
if (con->connection_type == MONGO_NODE_INVALID) {
*error_message = strdup("ismaster: got unknown node type");
free(data_buffer);
return 0;
}
/* Find read preferences tags */
con->tag_count = 0;
con->tags = NULL;
if (bson_find_field_as_document(ptr, "tags", (char**) &tags)) {
char *it, *name, *value;
int length;
it = tags;
while (bson_array_find_next_string(&it, &name, &value)) {
con->tags = realloc(con->tags, (con->tag_count + 1) * sizeof(char*));
length = strlen(name) + strlen(value) + 2;
con->tags[con->tag_count] = malloc(length);
snprintf(con->tags[con->tag_count], length, "%s:%s", name, value);
free(name);
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: added tag %s", con->tags[con->tag_count]);
con->tag_count++;
}
}
/* If we get passed in a server it means we want to validate this node against it, along with discovery ReplicaSet stuff */
if (!server) {
goto done;
}
/* We find out whether the machine we connected too, is actually the
* one we thought we were connecting too */
/* MongoDB 1.8.x doesn't have the "me" field.
* The replicaset verification is done next step (setName). */
if (bson_find_field_as_string(ptr, "me", &connected_name)) {
we_think_we_are = mongo_server_hash_to_server(con->hash);
if (strcmp(connected_name, we_think_we_are) == 0) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: the server name matches what we thought it'd be (%s).", we_think_we_are);
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_WARN, "ismaster: the server name (%s) did not match with what we thought it'd be (%s).", connected_name, we_think_we_are);
/* We reset the name as the server responded with a different name than
* what we thought it was */
free(server->host);
server->host = mcon_strndup(connected_name, strchr(connected_name, ':') - connected_name);
server->port = atoi(strchr(connected_name, ':') + 1);
retval = 3;
}
free(we_think_we_are);
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_WARN, "Can't find 'me' in ismaster response, possibly not a replicaset (%s)", mongo_server_hash_to_server(con->hash));
}
/* Do replica set name test */
if (!set) {
char *errmsg = NULL;
bson_find_field_as_string(ptr, "errmsg", &errmsg);
if (errmsg) {
*error_message = strdup(errmsg);
} else {
*error_message = strdup("Not a replicaset member");
}
free(data_buffer);
return 0;
} else if (*repl_set_name) {
if (strcmp(set, *repl_set_name) != 0) {
struct mcon_str *tmp;
mcon_str_ptr_init(tmp);
mcon_str_add(tmp, "Host does not match replicaset name. Expected: ", 0);
mcon_str_add(tmp, *repl_set_name, 0);
mcon_str_add(tmp, "; Found: ", 0);
mcon_str_add(tmp, set, 0);
*error_message = strdup(tmp->d);
mcon_str_ptr_dtor(tmp);
free(data_buffer);
return 0;
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: the found replicaset name matches the expected one (%s).", set);
}
} else if (*repl_set_name == NULL) {
/* This can happen, in case the replicaset name was not given, but just
* bool(true) (or string("1")) in the connection options. */
mongo_manager_log(manager, MLOG_CON, MLOG_WARN, "ismaster: the replicaset name is not set, so we're using %s.", set);
*repl_set_name = strdup(set);
}
/* If the server definition has not set the repl_set_name member yet, set it here */
if (!server->repl_set_name) {
server->repl_set_name = strdup(set);
}
/* Find all hosts */
bson_find_field_as_array(ptr, "hosts", &hosts);
bson_find_field_as_array(ptr, "passives", &passives);
*nr_hosts = 0;
/* Iterate over the "hosts" document */
ptr = hosts;
while (bson_array_find_next_string(&ptr, NULL, &string)) {
(*nr_hosts)++;
*found_hosts = realloc(*found_hosts, (*nr_hosts) * sizeof(char*));
(*found_hosts)[*nr_hosts-1] = strdup(string);
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "found host: %s", string);
}
/* Iterate over the "passives" document (priority=0) */
if (passives) {
ptr = passives;
while (bson_array_find_next_string(&ptr, NULL, &string)) {
(*nr_hosts)++;
*found_hosts = realloc(*found_hosts, (*nr_hosts) * sizeof(char*));
(*found_hosts)[*nr_hosts-1] = strdup(string);
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "found host: %s (passive)", string);
}
}
con->last_replcheck = now.tv_sec;
done:
free(data_buffer);
con->last_ismaster = now.tv_sec;
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "ismaster: last ran at %ld", con->last_ismaster);
return retval;
}
/* Sends an ismaster command to the server to find server flags
*
* Returns 1 when it worked, and 0 when an error was encountered. */
int mongo_connection_get_server_flags(mongo_con_manager *manager, mongo_connection *con, mongo_server_options *options, char **error_message)
{
mcon_str *packet;
int32_t max_bson_size = 0, max_message_size = 0;
char *data_buffer;
char *ptr;
char *tags;
char *msg; /* If set and its value is "isdbgrid", it signals we connected to a mongos */
char *set = NULL; /* check if it is a replicaset */
unsigned char ismaster = 0, secondary = 0, arbiter = 0;
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "get_server_flags: start");
packet = bson_create_ismaster_packet(con);
if (!mongo_connect_send_packet(manager, con, options, packet, &data_buffer, error_message)) {
return 0;
}
/* Find data fields */
ptr = data_buffer + sizeof(int32_t); /* Skip the length */
/* Find max bson size */
if (bson_find_field_as_int32(ptr, "maxBsonObjectSize", &max_bson_size)) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "get_server_flags: setting maxBsonObjectSize to %d", max_bson_size);
con->max_bson_size = max_bson_size;
} else {
/* This seems to be a pre-1.8 MongoDB installation, where we need to
* default to 4MB */
con->max_bson_size = 4194304;
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "get_server_flags: can't find maxBsonObjectSize, defaulting to %d", con->max_bson_size);
}
/* Find max message size */
if (bson_find_field_as_int32(ptr, "maxMessageSizeBytes", &max_message_size)) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "get_server_flags: setting maxMessageSizeBytes to %d", max_message_size);
con->max_message_size = max_message_size;
} else {
/* This seems to be a pre-2.4 MongoDB installation, where we need to
* default to two times the max BSON size */
con->max_message_size = 2 * con->max_bson_size;
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "get_server_flags: can't find maxMessageSizeBytes, defaulting to %d", con->max_message_size);
}
/* Check for flags */
bson_find_field_as_bool(ptr, "ismaster", &ismaster);
bson_find_field_as_bool(ptr, "secondary", &secondary);
bson_find_field_as_bool(ptr, "arbiterOnly", &arbiter);
/* Set connection type depending on flags */
if (ismaster) {
/* Find msg and whether it contains "isdbgrid" */
if (bson_find_field_as_string(ptr, "msg", (char**) &msg) && strcmp(msg, "isdbgrid") == 0) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "get_server_flags: msg contains 'isdbgrid' - we're connected to a mongos");
con->connection_type = MONGO_NODE_MONGOS;
} else if (bson_find_field_as_string(ptr, "setName", &set)) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "get_server_flags: got replicaset name: %s", set);
con->connection_type = MONGO_NODE_PRIMARY;
} else {
con->connection_type = MONGO_NODE_STANDALONE;
}
} else if (secondary) {
con->connection_type = MONGO_NODE_SECONDARY;
} else if (arbiter) {
con->connection_type = MONGO_NODE_ARBITER;
} else {
con->connection_type = MONGO_NODE_INVALID;
}
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "get_server_flags: found server type: %s", mongo_connection_type(con->connection_type));
/* Find read preferences tags */
con->tag_count = 0;
con->tags = NULL;
if (bson_find_field_as_document(ptr, "tags", (char**) &tags)) {
char *it, *name, *value;
int length;
it = tags;
while (bson_array_find_next_string(&it, &name, &value)) {
con->tags = (char**) realloc(con->tags, (con->tag_count + 1) * sizeof(char*));
length = strlen(name) + strlen(value) + 2;
con->tags[con->tag_count] = (char*) malloc(length);
snprintf(con->tags[con->tag_count], length, "%s:%s", name, value);
free(name);
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "get_server_flags: added tag %s", con->tags[con->tag_count]);
con->tag_count++;
}
}
free(data_buffer);
return 1;
}
/* Sends an ismaster command to the server and returns an array of new
* connectable nodes
*
* Returns:
* 0: when an error occurred
* 1: when is master was run and worked
* 2: when is master wasn't run due to the time-out limit
* 3: when it all worked, but we need to remove the seed host (due to its name
* not being what the server thought it is) - in that case, the server in
* the last argument is changed */
int mongo_connection_ismaster(mongo_con_manager *manager, mongo_connection *con, mongo_server_options *options, char **repl_set_name, int *nr_hosts, char ***found_hosts, char **error_message, mongo_server_def *server)
{
mcon_str *packet;
char *data_buffer;
char *set = NULL; /* For replicaset in return */
char *hosts, *passives = NULL, *ptr, *string;
char *connected_name, *we_think_we_are;
struct timeval now;
int retval = 1;
gettimeofday(&now, NULL);
if ((con->last_ismaster + manager->ismaster_interval) > now.tv_sec) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: skipping: last ran at %ld, now: %ld, time left: %ld", con->last_ismaster, now.tv_sec, con->last_ismaster + manager->ismaster_interval - now.tv_sec);
return 2;
}
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "ismaster: start");
packet = bson_create_ismaster_packet(con);
if (!mongo_connect_send_packet(manager, con, options, packet, &data_buffer, error_message)) {
return 0;
}
/* Find data fields */
ptr = data_buffer + sizeof(int32_t); /* Skip the length */
/* We find out whether the machine we connected too, is actually the
* one we thought we were connecting too */
/* MongoDB 1.8.x doesn't have the "me" field.
* The replicaset verification is done next step (setName). */
if (bson_find_field_as_string(ptr, "me", &connected_name)) {
we_think_we_are = mongo_server_hash_to_server(con->hash);
if (strcmp(connected_name, we_think_we_are) == 0) {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: the server name matches what we thought it'd be (%s).", we_think_we_are);
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_WARN, "ismaster: the server name (%s) did not match with what we thought it'd be (%s).", connected_name, we_think_we_are);
/* We reset the name as the server responded with a different name than
* what we thought it was */
free(server->host);
server->host = mcon_strndup(connected_name, strchr(connected_name, ':') - connected_name);
server->port = atoi(strchr(connected_name, ':') + 1);
retval = 3;
}
free(we_think_we_are);
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_WARN, "Can't find 'me' in ismaster response, possibly not a replicaset (%s)", mongo_server_hash_to_server(con->hash));
}
/* Do replica set name test */
bson_find_field_as_string(ptr, "setName", &set);
if (!set) {
char *errmsg = NULL;
bson_find_field_as_string(ptr, "errmsg", &errmsg);
if (errmsg) {
*error_message = strdup(errmsg);
} else {
*error_message = strdup("Not a replicaset member");
}
free(data_buffer);
return 0;
} else if (*repl_set_name) {
if (strcmp(set, *repl_set_name) != 0) {
struct mcon_str *tmp;
mcon_str_ptr_init(tmp);
mcon_str_add(tmp, "Host does not match replicaset name. Expected: ", 0);
mcon_str_add(tmp, *repl_set_name, 0);
mcon_str_add(tmp, "; Found: ", 0);
mcon_str_add(tmp, set, 0);
*error_message = strdup(tmp->d);
mcon_str_ptr_dtor(tmp);
free(data_buffer);
return 0;
} else {
mongo_manager_log(manager, MLOG_CON, MLOG_FINE, "ismaster: the found replicaset name matches the expected one (%s).", set);
}
} else if (*repl_set_name == NULL) {
/* This can happen, in case the replicaset name was not given, but just
* bool(true) (or string("1")) in the connection options. */
mongo_manager_log(manager, MLOG_CON, MLOG_WARN, "ismaster: the replicaset name is not set, so we're using %s.", set);
*repl_set_name = strdup(set);
}
/* If the server definition has not set the repl_set_name member yet, set it here */
if (!server->repl_set_name) {
server->repl_set_name = strdup(set);
}
/* Find all hosts */
bson_find_field_as_array(ptr, "hosts", &hosts);
bson_find_field_as_array(ptr, "passives", &passives);
*nr_hosts = 0;
/* Iterate over the "hosts" document */
ptr = hosts;
while (bson_array_find_next_string(&ptr, NULL, &string)) {
(*nr_hosts)++;
*found_hosts = (char**) realloc(*found_hosts, (*nr_hosts) * sizeof(char*));
(*found_hosts)[*nr_hosts-1] = strdup(string);
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "found host: %s", string);
}
/* Iterate over the "passives" document (priority=0) */
if (passives) {
ptr = passives;
while (bson_array_find_next_string(&ptr, NULL, &string)) {
(*nr_hosts)++;
*found_hosts = (char**) realloc(*found_hosts, (*nr_hosts) * sizeof(char*));
(*found_hosts)[*nr_hosts-1] = strdup(string);
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "found host: %s (passive)", string);
}
}
free(data_buffer);
con->last_ismaster = now.tv_sec;
mongo_manager_log(manager, MLOG_CON, MLOG_INFO, "ismaster: last ran at %ld", con->last_ismaster);
return retval;
}
