/**
* \brief This function is main function of new thread for client
* \param *arg The pointer at verse client session
*/
static void *vc_new_session_thread(void *arg)
{
struct VSession *vsession = (struct VSession*)arg;
int i;
/* Start "never ending" thread of connection*/
vc_main_stream_loop(vc_ctx, vsession);
pthread_mutex_lock(&vc_ctx->mutex);
/* Find this session in Verse client session list */
for(i=0; i<vc_ctx->max_sessions; i++) {
if(vc_ctx->vsessions[i] != NULL) {
if(strcmp(vc_ctx->vsessions[i]->peer_hostname, vsession->peer_hostname)==0 &&
strcmp(vc_ctx->vsessions[i]->service, vsession->service)==0) {
vc_ctx->vsessions[i] = NULL;
break;
}
}
}
/* When connection is closed, then destroy this session*/
v_destroy_session(vsession);
free(vsession);
pthread_mutex_unlock(&vc_ctx->mutex);
return NULL;
}
/**
* \brief Destroy Verse server context
*
* \param[in] vs_ctx The Verse server context.
*/
static void vs_destroy_ctx(struct VS_CTX *vs_ctx)
{
struct VSUser *user;
int i;
/* Free all data shared at verse server */
vs_node_destroy_branch(vs_ctx, vs_ctx->data.root_node, 0);
/* Destroy hashed array of nodes */
v_hash_array_destroy(&vs_ctx->data.nodes);
/* Destroy list of connections */
for (i=0; i<vs_ctx->max_sessions; i++) {
if(vs_ctx->vsessions[i] != NULL) {
v_destroy_session(vs_ctx->vsessions[i]);
free(vs_ctx->vsessions[i]);
vs_ctx->vsessions[i] = NULL;
}
}
free(vs_ctx->vsessions); vs_ctx->vsessions = NULL;
free(vs_ctx->port_list); vs_ctx->port_list = NULL;
free(vs_ctx->tcp_io_ctx.buf); vs_ctx->tcp_io_ctx.buf = NULL;
free(vs_ctx->private_cert_file); vs_ctx->private_cert_file = NULL;
if(vs_ctx->ca_cert_file != NULL) {
free(vs_ctx->ca_cert_file);
vs_ctx->ca_cert_file = NULL;
}
free(vs_ctx->public_cert_file); vs_ctx->public_cert_file = NULL;
free(vs_ctx->hostname); vs_ctx->hostname = NULL;
free(vs_ctx->ded); vs_ctx->ded = NULL;
if(vs_ctx->csv_user_file != NULL) {
free(vs_ctx->csv_user_file);
vs_ctx->csv_user_file = NULL;
}
user = (struct VSUser*)vs_ctx->users.first;
while(user != NULL) {
vs_user_free(user);
user = user->next;
}
v_list_free(&vs_ctx->users);
#ifdef WITH_OPENSSL
vs_destroy_stream_ctx(vs_ctx);
#endif
}
/**
* \brief Free verse client context
*/
void vc_free_ctx(VC_CTX *vc_ctx)
{
int i;
for(i=0; i<vc_ctx->max_sessions; i++) {
if(vc_ctx->vsessions[i]!=NULL) {
v_destroy_session(vc_ctx->vsessions[i]);
free(vc_ctx->vsessions[i]);
vc_ctx->vsessions[i] = NULL;
}
}
free(vc_ctx->ca_path);
if(vc_ctx->client_name) free(vc_ctx->client_name);
if(vc_ctx->client_version) free(vc_ctx->client_version);
}
int32_t vrs_send_connect_request(const char *hostname,
const char *service,
const uint16_t flags,
uint8_t *session_id)
{
struct VSession *vsession = NULL;
uint16 _flags = flags;
int already_connected = 0, i, ret;
/* Check if CTX was initialized (initialization is done) */
if(vc_ctx == NULL) {
v_print_log(VRS_PRINT_ERROR,
"Basic callback functions were not set.\n");
return VRS_NO_CB_FUNC;
} else {
/* Check if all needed callback functions was set up */
if(vc_ctx->vfs.receive_connect_accept == NULL) {
v_print_log(VRS_PRINT_ERROR,
"receive_connect_accept() callback functions was not set.\n");
return VRS_NO_CB_CONN_FUNC;
}
if(vc_ctx->vfs.receive_connect_terminate == NULL) {
v_print_log(VRS_PRINT_ERROR,
"receive_connect_terminate() callback functions was not set.\n");
return VRS_NO_CB_TERM_FUNC;
}
if(vc_ctx->vfs.receive_user_authenticate == NULL) {
v_print_log(VRS_PRINT_ERROR,
"receive_user_authenticat() callback functions was not set.\n");
return VRS_NO_CB_USER_AUTH;
}
}
/* Set security protocol */
#if OPENSSL_VERSION_NUMBER >= 0x10000000
/* Check consistency of flags */
if((_flags & VRS_SEC_DATA_NONE) && (_flags & VRS_SEC_DATA_TLS)) {
if(is_log_level(VRS_PRINT_ERROR))
v_print_log(VRS_PRINT_ERROR,
"VRS_SEC_DATA_NONE or VRS_SEC_DATA_TLS could be set, not both.\n");
return VRS_FAILURE;
}
#else
if (_flags & VRS_SEC_DATA_TLS) {
v_print_log(VRS_PRINT_WARNING,
"flag VRS_SEC_DATA_TLS could be set due to low version of OpenSSL (at least 1.0 is required).\n");
_flags &= ~VRS_SEC_DATA_TLS;
_flags |= VRS_SEC_DATA_NONE;
}
#endif
/* Set transport protocol */
if((_flags & VRS_TP_UDP) && (_flags & VRS_TP_TCP)) {
if(is_log_level(VRS_PRINT_ERROR))
v_print_log(VRS_PRINT_ERROR,
"VRS_TP_UDP or VRS_TP_TCP could be set, not both.\n");
return VRS_FAILURE;
} else if(!(_flags & VRS_TP_UDP) && !(_flags & VRS_TP_TCP)) {
/* When no transport protocol is selected, then use UDP as default */
_flags |= VRS_TP_UDP;
}
pthread_mutex_lock(&vc_ctx->mutex);
/* Check if this client isn't already connected to this server or isn't
* trying to connect to the server with hostname:service */
for(i=0; i<vc_ctx->max_sessions; i++) {
if(vc_ctx->vsessions[i] != NULL) {
if(strcmp(vc_ctx->vsessions[i]->peer_hostname, hostname) == 0 &&
strcmp(vc_ctx->vsessions[i]->service, service) == 0) {
v_print_log(VRS_PRINT_ERROR, "Client already connected to this server.\n");
already_connected = 1;
break;
}
}
}
if(already_connected == 0) {
/* Try to find free verse session slot */
for(i=0; i<vc_ctx->max_sessions; i++) {
/* When free VSession slot is found, then create new session */
if(vc_ctx->vsessions[i]==NULL) {
vsession = (struct VSession*)malloc(sizeof(struct VSession));
v_init_session(vsession);
vsession->peer_hostname = strdup(hostname);
vsession->service = strdup(service);
/* Copy flags */
vsession->flags = _flags;
vsession->in_queue = (struct VInQueue*)calloc(1, sizeof(VInQueue));
v_in_queue_init(vsession->in_queue, IN_QUEUE_DEFAULT_MAX_SIZE);
vsession->out_queue = (struct VOutQueue*)calloc(1, sizeof(VOutQueue));
v_out_queue_init(vsession->out_queue, OUT_QUEUE_DEFAULT_MAX_SIZE);
vc_ctx->vsessions[i] = vsession;
break;
}
}
}
pthread_mutex_unlock(&vc_ctx->mutex);
if(already_connected == 1) {
return VRS_FAILURE;
}
/* Check if we found free slot for new session */
if(vsession == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"Maximal count of sessions: %d reached.\n",
vc_ctx->max_sessions);
return VRS_FAILURE;
}
vsession->session_id = vc_ctx->session_counter++;
*session_id = vsession->session_id;
/* Try to initialize thread attributes */
if( (ret = pthread_attr_init(&vsession->tcp_thread_attr)) != 0 ) {
if(is_log_level(VRS_PRINT_ERROR)) v_print_log(VRS_PRINT_ERROR, "pthread_attr_init(): %s\n", strerror(errno));
return VRS_FAILURE;
}
/* Try to set thread attributes as detached */
if( (ret = pthread_attr_setdetachstate(&vsession->tcp_thread_attr, PTHREAD_CREATE_DETACHED)) != 0) {
if(is_log_level(VRS_PRINT_ERROR)) v_print_log(VRS_PRINT_ERROR, "pthread_attr_setdetachstate(): %s\n", strerror(errno));
return VRS_FAILURE;
}
/* Create thread for new client session */
if(pthread_create(&vsession->tcp_thread, &vsession->tcp_thread_attr, vc_new_session_thread, (void*)vsession) != 0) {
if(is_log_level(VRS_PRINT_ERROR)) v_print_log(VRS_PRINT_ERROR, "Thread creation failed.\n");
pthread_mutex_lock(&vc_ctx->mutex);
v_destroy_session(vsession);
free(vsession);
vc_ctx->vsessions[i] = NULL;
pthread_mutex_unlock(&vc_ctx->mutex);
return VRS_FAILURE;
}
/* Destroy thread attributes */
pthread_attr_destroy(&vsession->tcp_thread_attr);
return VRS_SUCCESS;
}
