static int vs_RESPOND_krb_auth_loop(struct vContext *C, const char *u_name) {
struct VS_CTX *vs_ctx = CTX_server_ctx(C);
struct IO_CTX *io_ctx = CTX_io_ctx(C);
struct VSession *vsession = CTX_current_session(C);
struct VMessage *r_message = CTX_r_message(C);
struct VMessage *s_message = CTX_s_message(C);
int i, cmd_rank = 0, client_name_proposed = 0, client_version_proposed = 0;
unsigned short buffer_pos = 0;
int user_id;
/* Reset content of received message */
memset(r_message, 0, sizeof(struct VMessage));
/* Unpack Verse message header */
buffer_pos += v_unpack_message_header(&io_ctx->buf[buffer_pos], (io_ctx->buf_size - buffer_pos), r_message);
/* Unpack all system commands */
buffer_pos += v_unpack_message_system_commands(&io_ctx->buf[buffer_pos], (io_ctx->buf_size - buffer_pos), r_message);
v_print_receive_message(C);
for(i=0; i<MAX_SYSTEM_COMMAND_COUNT && r_message->sys_cmd[i].cmd.id!=CMD_RESERVED_ID; i++) {
switch(r_message->sys_cmd[i].cmd.id) {
case CMD_CHANGE_L_ID:
/* Client could propose client name and version */
if(r_message->sys_cmd[i].negotiate_cmd.feature == FTR_CLIENT_NAME) {
if(r_message->sys_cmd[i].negotiate_cmd.count > 0) {
/* Only first proposed client name will be used */
vsession->client_name = strdup((char*)r_message->sys_cmd[i].negotiate_cmd.value[0].string8.str);
client_name_proposed = 1;
}
} else if(r_message->sys_cmd[i].negotiate_cmd.feature == FTR_CLIENT_VERSION) {
if(r_message->sys_cmd[i].negotiate_cmd.count > 0) {
/* Only first proposed client name will be used */
vsession->client_version = strdup((char*)r_message->sys_cmd[i].negotiate_cmd.value[0].string8.str);
client_version_proposed = 1;
}
}
break;
default:
v_print_log(VRS_PRINT_WARNING,
"This command id: %d is not supported in this state\n",
r_message->sys_cmd[i].cmd.id);
break;
}
}
buffer_pos = VERSE_MESSAGE_HEADER_SIZE;
/* Send confirmation about client name */
if (client_name_proposed == 1) {
v_add_negotiate_cmd(s_message->sys_cmd, cmd_rank++, CMD_CONFIRM_L_ID,
FTR_CLIENT_NAME, vsession->client_name, NULL);
}
/* Send confirmation about client version only in situation, when
* client proposed client name too */
if (client_version_proposed == 1) {
if (client_name_proposed == 1) {
v_add_negotiate_cmd(s_message->sys_cmd, cmd_rank++,
CMD_CONFIRM_L_ID, FTR_CLIENT_VERSION,
vsession->client_version, NULL);
} else {
/* Client version without client name is not allowed */
v_add_negotiate_cmd(s_message->sys_cmd, cmd_rank++,
CMD_CONFIRM_L_ID, FTR_CLIENT_VERSION,
NULL);
}
}
/* Do user authentication */
if ((user_id = vs_krb_make_user(C, u_name)) != -1) {
long int avatar_id;
pthread_mutex_lock(&vs_ctx->data.mutex);
avatar_id = vs_create_avatar_node(vs_ctx, vsession, user_id);
pthread_mutex_unlock(&vs_ctx->data.mutex);
if(avatar_id == -1) {
v_print_log(VRS_PRINT_ERROR, "Failed to create avatar node\n");
return 0;
}
/* Save user_id to the session and send it in
* connect_accept command */
vsession->user_id = user_id;
vsession->avatar_id = avatar_id;
s_message->sys_cmd[cmd_rank].ua_succ.id = CMD_USER_AUTH_SUCCESS;
s_message->sys_cmd[cmd_rank].ua_succ.user_id = user_id;
s_message->sys_cmd[cmd_rank].ua_succ.avatar_id = avatar_id;
cmd_rank++;
/* Generate random string for coockie */
vsession->peer_cookie.str = (char*)calloc((COOKIE_SIZE+1), sizeof(char));
for(i=0; i<COOKIE_SIZE; i++) {
/* Generate only printable characters (debug prints) */
vsession->peer_cookie.str[i] = 32 + (char)((float)rand()*94.0/RAND_MAX);
}
vsession->peer_cookie.str[COOKIE_SIZE] = '\0';
/* Set up negotiate command of the host cookie */
v_add_negotiate_cmd(s_message->sys_cmd, cmd_rank++, CMD_CHANGE_R_ID, FTR_COOKIE,
vsession->peer_cookie.str, NULL);
/* Load DED from configuration and save it to the session */
vsession->ded.str = strdup(vs_ctx->ded);
v_add_negotiate_cmd(s_message->sys_cmd, cmd_rank++, CMD_CHANGE_L_ID, FTR_DED,
vsession->ded.str, NULL);
buffer_pos += v_pack_stream_system_commands(s_message, &io_ctx->buf[buffer_pos]);
s_message->header.len = io_ctx->buf_size = buffer_pos;
s_message->header.version = VRS_VERSION;
/* Pack header to the beginning of the buffer */
v_pack_message_header(s_message, io_ctx->buf);
v_print_send_message(C);
return 1;
} else {
s_message->sys_cmd[0].ua_fail.id = CMD_USER_AUTH_FAILURE;
s_message->sys_cmd[0].ua_fail.count = 0;
s_message->sys_cmd[1].cmd.id = CMD_RESERVED_ID;
buffer_pos += v_pack_stream_system_commands(s_message,
&io_ctx->buf[buffer_pos]);
s_message->header.len = io_ctx->buf_size = buffer_pos;
s_message->header.version = VRS_VERSION;
/* Pack header to the beginning of the buffer */
v_pack_message_header(s_message, io_ctx->buf);
v_print_send_message(C);
return 1;
}
return 0;
}
/**
* \brief This function is called, when server is in NEGOTIATE_cookie_ded state
*
* This function can create new thread for datagram connection
*/
int vs_NEGOTIATE_cookie_ded_loop(struct vContext *C)
{
struct VS_CTX *vs_ctx = CTX_server_ctx(C);
struct IO_CTX *io_ctx = CTX_io_ctx(C);
struct VSession *vsession = CTX_current_session(C);
struct VMessage *r_message = CTX_r_message(C);
struct VMessage *s_message = CTX_s_message(C);
int i, j, ret;
unsigned short buffer_pos = 0;
int host_url_proposed = 0,
host_cookie_proposed = 0,
peer_cookie_confirmed = 0,
ded_confirmed = 0,
client_name_proposed = 0,
client_version_proposed = 0;
struct timeval tv;
struct VURL url;
/* Reset content of received message */
memset(r_message, 0, sizeof(struct VMessage));
/* Unpack Verse message header */
buffer_pos += v_unpack_message_header(&io_ctx->buf[buffer_pos], (io_ctx->buf_size - buffer_pos), r_message);
/* Unpack all system commands */
buffer_pos += v_unpack_message_system_commands(&io_ctx->buf[buffer_pos], (io_ctx->buf_size - buffer_pos), r_message);
v_print_receive_message(C);
/* Process all received system commands */
for(i=0;
i<MAX_SYSTEM_COMMAND_COUNT &&
r_message->sys_cmd[i].cmd.id!=CMD_RESERVED_ID;
i++)
{
switch(r_message->sys_cmd[i].cmd.id) {
case CMD_CHANGE_R_ID:
/* Client has to propose url in this state */
if(r_message->sys_cmd[i].negotiate_cmd.feature == FTR_HOST_URL) {
if(r_message->sys_cmd[i].negotiate_cmd.count > 0) {
if(vsession->host_url!=NULL) {
free(vsession->host_url);
}
/* Only first proposed URL will be used */
vsession->host_url = strdup((char*)r_message->sys_cmd[i].negotiate_cmd.value[0].string8.str);
/* Check if proposed URL is correct */
ret = v_parse_url(vsession->host_url, &url);
if(ret == 1)
host_url_proposed = 1;
else
host_url_proposed = 0;
}
/* Client has to propose host cookie in this state */
} else if(r_message->sys_cmd[i].negotiate_cmd.feature == FTR_COOKIE) {
if(r_message->sys_cmd[i].negotiate_cmd.count > 0) {
if(vsession->host_cookie.str != NULL) {
free(vsession->host_cookie.str);
}
vsession->host_cookie.str = strdup((char*)r_message->sys_cmd[i].negotiate_cmd.value[0].string8.str);
host_cookie_proposed = 1;
}
} else {
v_print_log(VRS_PRINT_WARNING, "This feature id: %d is not supported in this state\n",
r_message->sys_cmd[i].negotiate_cmd.feature);
}
break;
case CMD_CHANGE_L_ID:
/* Client could propose client name and version */
if(r_message->sys_cmd[i].negotiate_cmd.feature == FTR_CLIENT_NAME) {
if(r_message->sys_cmd[i].negotiate_cmd.count > 0) {
/* Only first proposed client name will be used */
vsession->client_name = strdup((char*)r_message->sys_cmd[i].negotiate_cmd.value[0].string8.str);
client_name_proposed = 1;
}
} else if(r_message->sys_cmd[i].negotiate_cmd.feature == FTR_CLIENT_VERSION) {
if(r_message->sys_cmd[i].negotiate_cmd.count > 0) {
/* Only first proposed client name will be used */
vsession->client_version = strdup((char*)r_message->sys_cmd[i].negotiate_cmd.value[0].string8.str);
client_version_proposed = 1;
}
}
break;
case CMD_CONFIRM_R_ID:
/* Client has to confirm peer cookie in this state */
if(r_message->sys_cmd[i].negotiate_cmd.feature == FTR_COOKIE) {
if (r_message->sys_cmd[i].negotiate_cmd.count == 1) {
if(vsession->peer_cookie.str != NULL &&
strcmp(vsession->peer_cookie.str, (char*)r_message->sys_cmd[i].negotiate_cmd.value[0].string8.str) == 0)
{
gettimeofday(&tv, NULL);
vsession->peer_cookie.tv.tv_sec = tv.tv_sec;
vsession->peer_cookie.tv.tv_usec = tv.tv_usec;
peer_cookie_confirmed = 1;
}
}
} else {
v_print_log(VRS_PRINT_WARNING, "This feature id: %d is not supported in this state\n",
r_message->sys_cmd[i].negotiate_cmd.feature);
}
break;
case CMD_CONFIRM_L_ID:
/* Client has to confirm DED in this state */
if(r_message->sys_cmd[i].negotiate_cmd.feature == FTR_DED) {
if(r_message->sys_cmd[i].negotiate_cmd.count == 1) {
if(vsession->ded.str != NULL &&
strcmp(vsession->ded.str, (char*)r_message->sys_cmd[i].negotiate_cmd.value[0].string8.str) == 0)
{
ded_confirmed = 1;
} else {
printf("%s != %s\n", vsession->ded.str, (char*)r_message->sys_cmd[i].negotiate_cmd.value[0].string8.str);
}
}
}
break;
default:
v_print_log(VRS_PRINT_WARNING, "This command id: %d is not supported in this state\n",
r_message->sys_cmd[i].cmd.id);
break;
}
}
/* Send response on cookie request */
if(host_url_proposed==1 &&
host_cookie_proposed==1 &&
peer_cookie_confirmed==1 &&
ded_confirmed==1)
{
struct vContext *new_C;
char trans_proto[4];
char sec_proto[5];
int cmd_rank = 0;
buffer_pos = VERSE_MESSAGE_HEADER_SIZE;
/* Copy address of peer */
memcpy(&vsession->peer_address, &io_ctx->peer_addr, sizeof(struct VNetworkAddress));
/* Do not confirm proposed URL */
v_add_negotiate_cmd(s_message->sys_cmd, cmd_rank++, CMD_CONFIRM_R_ID, FTR_HOST_URL, NULL);
/* Find first unused port from port range */
for(i=vs_ctx->port_low, j=0; i<vs_ctx->port_high; i++, j++) {
if(!(vs_ctx->port_list[j].flag & SERVER_PORT_USED)) {
vsession->dgram_conn->io_ctx.host_addr.port = vs_ctx->port_list[j].port_number;
vs_ctx->port_list[j].flag |= SERVER_PORT_USED;
break;
}
}
/* Do not allow unsecure TCP data connection */
if(url.transport_protocol == VRS_TP_TCP) {
url.security_protocol = VRS_SEC_DATA_TLS;
}
/* Copy settings about data connection to the session */
vsession->flags |= url.security_protocol;
vsession->flags |= url.transport_protocol;
if(vsession->flags & VRS_TP_UDP) {
strncpy(trans_proto, "udp", 3);
trans_proto[3] = '\0';
/* Create copy of new Verse context for new thread */
new_C = (struct vContext*)calloc(1, sizeof(struct vContext));
memcpy(new_C, C, sizeof(struct vContext));
/* Try to create new thread */
if((ret = pthread_create(&vsession->udp_thread, NULL, vs_main_dgram_loop, (void*)new_C)) != 0) {
if(is_log_level(VRS_PRINT_ERROR)) v_print_log(VRS_PRINT_ERROR, "pthread_create(): %s\n", strerror(errno));
ret = 0;
goto end;
}
/* Wait for datagram thread to be in LISTEN state */
while(vsession->dgram_conn->host_state != UDP_SERVER_STATE_LISTEN) {
/* Sleep 1 milisecond */
usleep(1000);
}
} else if(vsession->flags & VRS_TP_TCP) {
strncpy(trans_proto, "tcp", 3);
trans_proto[3] = '\0';
} else if(vsession->flags & VRS_TP_WEBSOCKET) {
strncpy(trans_proto, "wss", 3);
trans_proto[3] = '\0';
}
#if (defined WITH_OPENSSL) && OPENSSL_VERSION_NUMBER>=0x10000000
if(url.security_protocol==VRS_SEC_DATA_NONE ||
!(vs_ctx->security_protocol & VRS_SEC_DATA_TLS))
{
strncpy(sec_proto, "none", 4);
sec_proto[4] = '\0';
} else if(url.security_protocol==VRS_SEC_DATA_TLS) {
if(vsession->flags & VRS_TP_UDP) {
strncpy(sec_proto, "dtls", 4);
sec_proto[4] = '\0';
} else if((vsession->flags & VRS_TP_TCP) ||
(vsession->flags & VRS_TP_WEBSOCKET))
{
strncpy(sec_proto, "tls", 3);
sec_proto[3] = '\0';
}
} else {
strncpy(sec_proto, "none", 4);
sec_proto[4] = '\0';
}
#else
strncpy(sec_proto, "none", 4);
sec_proto[4] = '\0';
#endif
/* Free proposed and now obsolete URL */
if(vsession->host_url != NULL) {
free(vsession->host_url);
vsession->host_url = NULL;
}
/* Set right host URL */
vsession->host_url = calloc(UCHAR_MAX, sizeof(char));
if(url.ip_ver==IPV6) {
sprintf(vsession->host_url, "verse-%s-%s://[%s]:%d",
trans_proto,
sec_proto,
url.node,
vsession->dgram_conn->io_ctx.host_addr.port);
} else {
sprintf(vsession->host_url, "verse-%s-%s://%s:%d",
trans_proto,
sec_proto,
url.node,
vsession->dgram_conn->io_ctx.host_addr.port);
}
v_add_negotiate_cmd(s_message->sys_cmd, cmd_rank++, CMD_CHANGE_L_ID, FTR_HOST_URL, vsession->host_url, NULL);
/* Set time for the host cookie */
gettimeofday(&tv, NULL);
vsession->host_cookie.tv.tv_sec = tv.tv_sec;
vsession->host_cookie.tv.tv_usec = tv.tv_usec;
/* Send confirmation about host cookie */
v_add_negotiate_cmd(s_message->sys_cmd, cmd_rank++, CMD_CONFIRM_R_ID, FTR_COOKIE,
vsession->host_cookie.str, NULL);
/* Send confirmation about client name */
if(client_name_proposed == 1) {
v_add_negotiate_cmd(s_message->sys_cmd, cmd_rank++, CMD_CONFIRM_L_ID, FTR_CLIENT_NAME,
vsession->client_name, NULL);
}
/* Send confirmation about client version only in situation, when
* client proposed client name too */
if(client_version_proposed == 1) {
if(client_name_proposed == 1) {
v_add_negotiate_cmd(s_message->sys_cmd, cmd_rank++, CMD_CONFIRM_L_ID, FTR_CLIENT_VERSION,
vsession->client_version, NULL);
} else {
/* Client version without client name is not allowed */
v_add_negotiate_cmd(s_message->sys_cmd, cmd_rank++, CMD_CONFIRM_L_ID, FTR_CLIENT_VERSION,
NULL);
}
}
/* Pack all system commands to the buffer */
buffer_pos += v_pack_stream_system_commands(s_message, &io_ctx->buf[buffer_pos]);
/* Update length of message in the header (data in buffer) */
s_message->header.version = VRS_VERSION;
s_message->header.len = io_ctx->buf_size = buffer_pos;
/* Pack header to the beginning of the buffer */
v_pack_message_header(s_message, io_ctx->buf);
v_print_send_message(C);
ret = 1;
} else {
ret = 0;
}
end:
v_clear_url(&url);
return ret;
}
int vs_RESPOND_userauth_loop(struct vContext *C)
{
struct VS_CTX *vs_ctx = CTX_server_ctx(C);
struct IO_CTX *io_ctx = CTX_io_ctx(C);
struct VSession *vsession = CTX_current_session(C);
struct VMessage *r_message = CTX_r_message(C);
struct VMessage *s_message = CTX_s_message(C);
int i, cmd_rank = 0;
unsigned short buffer_pos = 0;
/* Reset content of received message */
memset(r_message, 0, sizeof(struct VMessage));
/* Unpack Verse message header */
buffer_pos += v_unpack_message_header(&io_ctx->buf[buffer_pos], (io_ctx->buf_size - buffer_pos), r_message);
/* Unpack all system commands */
buffer_pos += v_unpack_message_system_commands(&io_ctx->buf[buffer_pos], (io_ctx->buf_size - buffer_pos), r_message);
v_print_receive_message(C);
for(i=0; i<MAX_SYSTEM_COMMAND_COUNT && r_message->sys_cmd[i].cmd.id!=CMD_RESERVED_ID; i++) {
if(r_message->sys_cmd[i].cmd.id == CMD_USER_AUTH_REQUEST) {
if(r_message->sys_cmd[i].ua_req.method_type == VRS_UA_METHOD_PASSWORD) {
int user_id;
/* Do user authentication */
if((user_id = vs_user_auth(C,
r_message->sys_cmd[i].ua_req.username,
r_message->sys_cmd[i].ua_req.data)) != -1)
{
long int avatar_id;
pthread_mutex_lock(&vs_ctx->data.mutex);
avatar_id = vs_create_avatar_node(vs_ctx, vsession, user_id);
pthread_mutex_unlock(&vs_ctx->data.mutex);
if(avatar_id == -1) {
v_print_log(VRS_PRINT_ERROR, "Failed to create avatar node\n");
return 0;
}
buffer_pos = VERSE_MESSAGE_HEADER_SIZE;
/* Save user_id to the session and send it in
* connect_accept command */
vsession->user_id = user_id;
vsession->avatar_id = avatar_id;
s_message->sys_cmd[cmd_rank].ua_succ.id = CMD_USER_AUTH_SUCCESS;
s_message->sys_cmd[cmd_rank].ua_succ.user_id = user_id;
s_message->sys_cmd[cmd_rank].ua_succ.avatar_id = avatar_id;
cmd_rank++;
/* Generate random string for coockie */
vsession->peer_cookie.str = (char*)calloc((COOKIE_SIZE+1), sizeof(char));
for(i=0; i<COOKIE_SIZE; i++) {
/* Generate only printable characters (debug prints) */
vsession->peer_cookie.str[i] = 32 + (char)((float)rand()*94.0/RAND_MAX);
}
vsession->peer_cookie.str[COOKIE_SIZE] = '\0';
/* Set up negotiate command of the host cookie */
v_add_negotiate_cmd(s_message->sys_cmd, cmd_rank++, CMD_CHANGE_R_ID, FTR_COOKIE,
vsession->peer_cookie.str, NULL);
/* Load DED from configuration and save it to the session */
vsession->ded.str = strdup(vs_ctx->ded);
v_add_negotiate_cmd(s_message->sys_cmd, cmd_rank++, CMD_CHANGE_L_ID, FTR_DED,
vsession->ded.str, NULL);
buffer_pos += v_pack_stream_system_commands(s_message, &io_ctx->buf[buffer_pos]);
s_message->header.len = io_ctx->buf_size = buffer_pos;
s_message->header.version = VRS_VERSION;
/* Pack header to the beginning of the buffer */
v_pack_message_header(s_message, io_ctx->buf);
v_print_send_message(C);
return 1;
} else {
buffer_pos = VERSE_MESSAGE_HEADER_SIZE;
s_message->sys_cmd[0].ua_fail.id = CMD_USER_AUTH_FAILURE;
s_message->sys_cmd[0].ua_fail.count = 0;
s_message->sys_cmd[1].cmd.id = CMD_RESERVED_ID;
buffer_pos += v_pack_stream_system_commands(s_message, &io_ctx->buf[buffer_pos]);
s_message->header.len = io_ctx->buf_size = buffer_pos;
s_message->header.version = VRS_VERSION;
/* Pack header to the beginning of the buffer */
v_pack_message_header(s_message, io_ctx->buf);
v_print_send_message(C);
return 1;
}
}
}
}
return 0;
}
/**
* \brief This function packs and compress command to the packet from one
* priority queue.
*
* \param[in] *C The verse context
* \param[in] *sent_packet The pointer at structure with send packet
* \param[in] buffer_pos The curent size of buffer of sent packet
* \param[in] prio The priority of sub queue
* \param[in] prio_win The window size of current prio queue
* \param[out] tot_cmd_size The total size of commands that were poped from prio queue
*/
static int pack_prio_queue(struct vContext *C,
struct VSent_Packet *sent_packet,
int buffer_pos,
uint8 prio,
uint16 prio_win,
uint16 *tot_cmd_size)
{
struct VSession *vsession = CTX_current_session(C);
struct VDgramConn *vconn = CTX_current_dgram_conn(C);
struct IO_CTX *io_ctx = CTX_io_ctx(C);
struct Generic_Cmd *cmd;
int ret, last_cmd_count = 0;
uint16 cmd_count, cmd_len, cmd_size, sum_len=0;
int8 cmd_share;
uint8 last_cmd_id = CMD_RESERVED_ID;
while( (v_out_queue_get_count_prio(vsession->out_queue, prio) > 0) &&
(sum_len < prio_win) &&
(buffer_pos < vconn->io_ctx.mtu))
{
cmd_count = 0;
cmd_share = 0;
/* Compute how many commands could be compressed to the packet
* and compute right length of compressed commands. */
cmd_len = ((prio_win - sum_len)<(vconn->io_ctx.mtu - buffer_pos)) ?
(prio_win - sum_len) :
(vconn->io_ctx.mtu - buffer_pos);
/* Remove command from queue */
cmd = v_out_queue_pop(vsession->out_queue, prio, &cmd_count, &cmd_share, &cmd_len);
/* When it is not possible to pop more commands from queue, then break
* while loop */
if(cmd == NULL) {
break;
}
/* Is this command fake command? */
if(cmd->id < MIN_CMD_ID) {
if(cmd->id == FAKE_CMD_CONNECT_TERMINATE) {
struct VS_CTX *vs_ctx = CTX_server_ctx(C);
if(vs_ctx != NULL) {
vconn->host_state = UDP_SERVER_STATE_CLOSEREQ;
} else {
vconn->host_state = UDP_CLIENT_STATE_CLOSING;
}
} else if(cmd->id == FAKE_CMD_FPS) {
struct Fps_Cmd *fps_cmd = (struct Fps_Cmd*)cmd;
/* Change value of FPS. It will be sent in negotiate command
* until it is confirmed be the peer (server) */
vsession->fps_host = fps_cmd->fps;
}
v_cmd_destroy(&cmd);
} else {
/* What was size of command in queue */
cmd_size = v_cmd_size(cmd);
if(!(buffer_pos < (vconn->io_ctx.mtu - cmd_size))) {
/* When there is not enough space for other command,
* then push command back to the beginning of queue. */
v_out_queue_push_head(vsession->out_queue, prio, cmd);
break;
} else {
/* Update total size of commands that were poped from queue */
*tot_cmd_size += cmd_size;
/* When compression is not allowed, then add this command as is */
if( vconn->host_cmd_cmpr == CMPR_NONE) {
cmd_count = 0;
cmd_len = cmd_size;
/* Debug print */
v_print_log(VRS_PRINT_DEBUG_MSG, "Cmd: %d, count: %d, length: %d\n",
cmd->id, cmd_count, cmd_len);
/* Add command to the buffer */
buffer_pos += v_cmd_pack(&io_ctx->buf[buffer_pos], cmd, cmd_len, 0);
} else {
/* When command compression is allowed and was ID of command changed? */
if( (cmd->id != last_cmd_id) || (last_cmd_count <= 0) ) {
/* When this command is alone, then use default command size */
if(cmd_count == 0) {
cmd_len = cmd_size;
} else {
/* FIXME: do not recompute command length here, but do it right,
* when command is added to the queue */
cmd_len = v_cmds_len(cmd, cmd_count, cmd_share, cmd_len);
}
/* Debug print */
v_print_log(VRS_PRINT_DEBUG_MSG, "Cmd: %d, count: %d, length: %d\n",
cmd->id, cmd_count, cmd_len);
/* Add command to the buffer */
buffer_pos += v_cmd_pack(&io_ctx->buf[buffer_pos], cmd, cmd_len, cmd_share);
/* Set up current count of commands in the line */
last_cmd_count = cmd_count;
/* Update summary of commands length */
sum_len += cmd_len;
} else {
buffer_pos += v_cmd_pack(&io_ctx->buf[buffer_pos], cmd, 0, cmd_share);
}
}
/* Print command */
v_cmd_print(VRS_PRINT_DEBUG_MSG, cmd);
/* TODO: remove command alias here (layer value set/unset) */
/* Add command to the packet history */
ret = v_packet_history_add_cmd(&vconn->packet_history, sent_packet, cmd, prio);
assert(ret==1);
/* Update last command id */
last_cmd_id = cmd->id;
/* Decrement counter of commands in queue */
last_cmd_count--;
}
}
}
return buffer_pos;
}
/**
* \brief This function is never ending loop of server state STREAM_OPEN.
* This loop is used, when Verse server uses TCP for data exchange (not
* UDP nor WebSocket)
*/
int vs_STREAM_OPEN_tcp_loop(struct vContext *C)
{
struct VS_CTX *vs_ctx = CTX_server_ctx(C);
struct VSession *vsession = CTX_current_session(C);
struct IO_CTX *io_ctx = CTX_io_ctx(C);
struct timeval tv;
fd_set set;
int flag, ret, error;
/* Set socket non-blocking */
flag = fcntl(io_ctx->sockfd, F_GETFL, 0);
if( (fcntl(io_ctx->sockfd, F_SETFL, flag | O_NONBLOCK)) == -1) {
if(is_log_level(VRS_PRINT_ERROR)) v_print_log(VRS_PRINT_ERROR, "fcntl(): %s\n", strerror(errno));
return -1;
}
/* "Never ending" loop */
while(1)
{
FD_ZERO(&set);
FD_SET(io_ctx->sockfd, &set);
/* Use negotiated FPS */
tv.tv_sec = 0;
tv.tv_usec = 1000000/vsession->fps_host;
/* Wait for recieved data */
if( (ret = select(io_ctx->sockfd+1, &set, NULL, NULL, &tv)) == -1) {
if(is_log_level(VRS_PRINT_ERROR)) v_print_log(VRS_PRINT_ERROR, "%s:%s():%d select(): %s\n",
__FILE__, __FUNCTION__, __LINE__, strerror(errno));
goto end;
/* Was event on the listen socket */
} else if(ret>0 && FD_ISSET(io_ctx->sockfd, &set)) {
/* Try to receive data through SSL connection */
if( v_tcp_read(io_ctx, &error) <= 0 ) {
goto end;
}
if(v_STREAM_handle_messages(C) == 0) {
goto end;
}
/* When some payload data were received, then poke data thread */
sem_post(vs_ctx->data.sem);
}
if( (ret = v_STREAM_pack_message(C)) == 0 ) {
goto end;
}
/* Send command to the client */
if(ret == 1) {
if( v_tcp_write(io_ctx, &error) <= 0) {
goto end;
}
}
}
end:
/* Set socket blocking again */
flag = fcntl(io_ctx->sockfd, F_GETFL, 0);
if( (fcntl(io_ctx->sockfd, F_SETFL, flag & ~O_NONBLOCK)) == -1) {
if(is_log_level(VRS_PRINT_ERROR)) v_print_log(VRS_PRINT_ERROR, "fcntl(): %s\n", strerror(errno));
return -1;
}
return 0;
}
/**
* \brief This function removes packet with id from history of sent packets.
* It removes all its commands from the command history too.
*
* \param[in] *C The verse context.
* \param[in] id The ID of packet, the will be removed from the history.
*
* \return This function returns 1, then packet with id was found in the history
* and it returns 0 otherwise.
*/
int v_packet_history_rem_packet(struct vContext *C, uint32 id)
{
struct VS_CTX *vs_ctx = CTX_server_ctx(C);
struct VDgramConn *dgram_conn = CTX_current_dgram_conn(C);
struct VPacket_History *history = &dgram_conn->packet_history;
struct VPacket *r_packet = CTX_r_packet(C);
struct VSent_Packet *sent_packet;
int ret = 0, is_fake_cmd_received = 0;
sent_packet = v_packet_history_find_packet(history, id);
if(sent_packet != NULL) {
struct VSent_Command *sent_cmd;
v_print_log(VRS_PRINT_DEBUG_MSG, "Removing packet: %d from history\n", sent_packet->id);
/* Go through the whole list of sent commands and free them from the
* hashed linked list */
sent_cmd = sent_packet->cmds.first;
while(sent_cmd != NULL) {
/* Remove own command from hashed linked list if it wasn't already
* removed, when command was obsoleted by some newer packet */
if(sent_cmd->vbucket!=NULL) {
struct Generic_Cmd *cmd = (struct Generic_Cmd*)sent_cmd->vbucket->data;
/* Bucket has to include some data */
assert(sent_cmd->vbucket->data!=NULL);
/* Decrease total size of commands that were sent and wasn't acknowladged yet*/
dgram_conn->sent_size -= v_cmd_size(cmd);
/* Put fake command for create/destroy commands at verse server */
if(vs_ctx != NULL) {
struct VSession *vsession = CTX_current_session(C);
struct Generic_Cmd *fake_cmd = NULL;
switch(cmd->id) {
case CMD_NODE_CREATE:
fake_cmd = v_fake_node_create_ack_create(UINT32(cmd->data[UINT16_SIZE + UINT32_SIZE]));
break;
case CMD_NODE_DESTROY:
fake_cmd = v_fake_node_destroy_ack_create(UINT32(cmd->data[0]));
break;
case CMD_TAGGROUP_CREATE:
fake_cmd = v_fake_taggroup_create_ack_create(UINT32(cmd->data[0]),
UINT16(cmd->data[UINT32_SIZE]));
break;
case CMD_TAGGROUP_DESTROY:
fake_cmd = v_fake_taggroup_destroy_ack_create(UINT32(cmd->data[0]),
UINT16(cmd->data[UINT32_SIZE]));
break;
case CMD_TAG_CREATE:
fake_cmd = v_tag_create_ack_create(UINT32(cmd->data[0]),
UINT16(cmd->data[UINT32_SIZE]),
UINT16(cmd->data[UINT32_SIZE + UINT16_SIZE]));
break;
case CMD_TAG_DESTROY:
fake_cmd = v_tag_destroy_ack_create(UINT32(cmd->data[0]),
UINT16(cmd->data[UINT32_SIZE]),
UINT16(cmd->data[UINT32_SIZE + UINT16_SIZE]));
break;
case CMD_LAYER_CREATE:
fake_cmd = v_fake_layer_create_ack_create(UINT32(cmd->data[0]),
UINT16(cmd->data[UINT32_SIZE + UINT16_SIZE]));
break;
case CMD_LAYER_DESTROY:
fake_cmd = v_fake_layer_destroy_ack_create(UINT32(cmd->data[0]),
UINT16(cmd->data[UINT32_SIZE]));
break;
default:
break;
}
if(fake_cmd != NULL) {
is_fake_cmd_received = 1;
/* Push command to the queue of incomming commands */
v_in_queue_push(vsession->in_queue, fake_cmd);
/* Print content of fake command */
v_fake_cmd_print(VRS_PRINT_DEBUG_MSG, fake_cmd);
}
}
/* Remove command from the history of sent commands */
ret = v_hash_array_remove_item(&history->cmd_hist[sent_cmd->id]->cmds, sent_cmd->vbucket->data);
if(ret == 1) {
/* Destroy command */
v_cmd_destroy(&cmd);
} else {
v_print_log(VRS_PRINT_ERROR, "Unable to remove command id: %d\n", sent_cmd->id);
ret = 0;
}
}
sent_cmd = sent_cmd->next;
}
/* Free linked list of sent commands */
v_list_free(&sent_packet->cmds);
/* Remove packet itself from the linked list of sent packet */
v_list_rem_item(&history->packets, sent_packet);
free(sent_packet);
ret = 1;
} else {
/* When acknowledged payload packet is not found in history, then it
* is OK, because it is probably keep alive packet without any node
* commands */
v_print_log(VRS_PRINT_DEBUG_MSG, "Packet with id: %d, not found in history\n", id);
}
/* When pure ack packet caused adding some fake commands to the queue, then
* poke server data thread */
if( (vs_ctx != NULL) && (is_fake_cmd_received == 1) && (r_packet->data == NULL)) {
sem_post(vs_ctx->data.sem);
}
return ret;
}
/**
* \brief The function with WebSocket infinite loop
*/
void *vs_websocket_loop(void *arg)
{
/* The vContext is passed as *user_data* in callback functions. */
struct vContext *C = (struct vContext*)arg;
struct VS_CTX *vs_ctx = CTX_server_ctx(C);
struct IO_CTX *io_ctx = CTX_io_ctx(C);
struct VStreamConn *stream_conn = CTX_current_stream_conn(C);
struct VSession *vsession = CTX_current_session(C);
struct VMessage *r_message=NULL, *s_message=NULL;
wslay_event_context_ptr wslay_ctx;
fd_set read_set, write_set;
struct timeval tv;
int ret, flags;
unsigned int int_size;
struct wslay_event_callbacks callbacks = {
vs_recv_ws_callback_data,
vs_send_ws_callback_data,
NULL,
NULL,
NULL,
NULL,
vs_ws_recv_msg_callback
};
vsession->flags |= VRS_TP_WEBSOCKET;
/* Set socket non-blocking */
flags = fcntl(io_ctx->sockfd, F_GETFL, 0);
if( fcntl(io_ctx->sockfd, F_SETFL, flags | O_NONBLOCK) == -1) {
v_print_log(VRS_PRINT_ERROR, "fcntl(): %s\n", strerror(errno));
goto end;
}
/* Listen for HTTP request from web client and try to do
* WebSocket handshake */
if(http_handshake(io_ctx->sockfd) != 0 ) {
goto end;
}
/* Try to get size of TCP buffer */
int_size = sizeof(int_size);
if( getsockopt(io_ctx->sockfd, SOL_SOCKET, SO_RCVBUF,
(void *)&stream_conn->socket_buffer_size, &int_size) != 0)
{
v_print_log(VRS_PRINT_ERROR,
"Unable to get TCP buffer size of WebSocket connection.\n");
goto end;
}
r_message = (struct VMessage*)calloc(1, sizeof(struct VMessage));
s_message = (struct VMessage*)calloc(1, sizeof(struct VMessage));
if(r_message == NULL || s_message == NULL) {
v_print_log(VRS_PRINT_ERROR, "Out of memory\n");
goto end;
}
CTX_r_message_set(C, r_message);
CTX_s_message_set(C, s_message);
/* Try to initialize WebSocket server context */
if(wslay_event_context_server_init(&wslay_ctx, &callbacks, C) != 0) {
v_print_log(VRS_PRINT_ERROR,
"Unable to initialize WebSocket server context\n");
goto end;
}
/* Set initial state */
stream_conn->host_state = TCP_SERVER_STATE_RESPOND_METHODS;
if(is_log_level(VRS_PRINT_DEBUG_MSG)) {
printf("%c[%d;%dm", 27, 1, 31);
v_print_log(VRS_PRINT_DEBUG_MSG,
"Server WebSocket state: RESPOND_methods\n");
printf("%c[%dm", 27, 0);
}
/* "Never ending" loop */
while(vsession->stream_conn->host_state != TCP_SERVER_STATE_CLOSED &&
( wslay_event_want_read(wslay_ctx) == 1 ||
wslay_event_want_write(wslay_ctx) == 1) )
{
/* When server is going to stop, then close connection with WebSocket
* client */
if(vs_ctx->state != SERVER_STATE_READY) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"Closing WebSocket connection: Server shutdown\n");
stream_conn->host_state = TCP_SERVER_STATE_CLOSING;
/* Try to close connection with WebSocket client */
wslay_event_queue_close(wslay_ctx,
WSLAY_CODE_GOING_AWAY,
(uint8_t*)"Server shutdown", /* Close message */
15); /* The length of close message s*/
}
/* Initialize read set */
FD_ZERO(&read_set);
if(wslay_event_want_read(wslay_ctx) == 1) {
/*
v_print_log(VRS_PRINT_DEBUG_MSG,
"Waiting for WebSocket message ...\n");
*/
FD_SET(io_ctx->sockfd, &read_set);
}
/* Initialize write set */
FD_ZERO(&write_set);
if(wslay_event_want_write(wslay_ctx) == 1) {
#if DEBUG_WEB_SOCKET
v_print_log(VRS_PRINT_DEBUG_MSG,
"Going to write message to WebSocket ...\n");
#endif
FD_SET(io_ctx->sockfd, &write_set);
}
/* Set timeout for select() */
if(stream_conn->host_state == TCP_SERVER_STATE_STREAM_OPEN) {
/* Use negotiated FPS */
tv.tv_sec = 0;
tv.tv_usec = 1000000/vsession->fps_host;
} else {
/* User have to send something in 30 seconds */
tv.tv_sec = VRS_TIMEOUT;
tv.tv_usec = 0;
}
if( (ret = select(io_ctx->sockfd + 1,
&read_set,
&write_set,
NULL, /* Don't care about exception */
&tv)) == -1) {
v_print_log(VRS_PRINT_ERROR, "%s:%s():%d select(): %s\n",
__FILE__, __FUNCTION__, __LINE__, strerror(errno));
goto end;
/* Was event on the listen socket */
} else if(ret > 0) {
if(FD_ISSET(io_ctx->sockfd, &read_set)) {
if( wslay_event_recv(wslay_ctx) != 0 ) {
goto end;
}
}
if (FD_ISSET(io_ctx->sockfd, &write_set)) {
if( wslay_event_send(wslay_ctx) != 0 ) {
goto end;
}
}
} else if(ret == 0 && stream_conn->host_state != TCP_SERVER_STATE_STREAM_OPEN) {
/* When handshake is not finished during VRS_TIMEOT seconds, then
* close connection with WebSocket client. */
v_print_log(VRS_PRINT_DEBUG_MSG,
"Closing WebSocket connection: Handshake timed-out\n");
stream_conn->host_state = TCP_SERVER_STATE_CLOSING;
wslay_event_queue_close(wslay_ctx,
WSLAY_CODE_PROTOCOL_ERROR,
(uint8_t*)"Handshake timed-out", /* Close message */
19); /* The length of close message */
}
if(stream_conn->host_state == TCP_SERVER_STATE_STREAM_OPEN) {
/* Check if there is any command in outgoing queue
* and eventually pack these commands to buffer */
if((ret = v_STREAM_pack_message(C)) == 0 ) {
goto end;
}
/* When at least one command was packed to buffer, then
* queue this buffer to WebSocket layer */
if(ret == 1) {
struct wslay_event_msg msgarg;
msgarg.opcode = WSLAY_BINARY_FRAME;
msgarg.msg = (uint8_t*)io_ctx->buf;
msgarg.msg_length = io_ctx->buf_size;
wslay_event_queue_msg(wslay_ctx, &msgarg);
}
}
}
end:
if(is_log_level(VRS_PRINT_DEBUG_MSG)) {
printf("%c[%d;%dm", 27, 1, 31);
v_print_log(VRS_PRINT_DEBUG_MSG, "Server WebSocket state: CLOSING\n");
printf("%c[%dm", 27, 0);
}
/* Set up TCP CLOSING state (non-blocking) */
vs_CLOSING(C);
/* Receive and Send messages are not necessary any more */
if(r_message != NULL) {
free(r_message);
r_message = NULL;
CTX_r_message_set(C, NULL);
}
if(s_message != NULL) {
free(s_message);
s_message = NULL;
CTX_s_message_set(C, NULL);
}
/* TCP connection is considered as CLOSED, but it is not possible to use
* this connection for other client */
stream_conn->host_state = TCP_SERVER_STATE_CLOSED;
/* NULL pointer at stream connection */
CTX_current_stream_conn_set(C, NULL);
/* Set TCP connection to CLOSED */
if(is_log_level(VRS_PRINT_DEBUG_MSG)) {
printf("%c[%d;%dm", 27, 1, 31);
v_print_log(VRS_PRINT_DEBUG_MSG, "Server WebSocket state: CLOSED\n");
printf("%c[%dm", 27, 0);
}
pthread_mutex_lock(&vs_ctx->data.mutex);
/* Unsubscribe this session (this avatar) from all nodes */
vs_node_free_avatar_reference(vs_ctx, vsession);
/* Try to destroy avatar node */
vs_node_destroy_avatar_node(vs_ctx, vsession);
pthread_mutex_unlock(&vs_ctx->data.mutex);
/* This session could be used again for authentication */
stream_conn->host_state = TCP_SERVER_STATE_LISTEN;
/* Clear session flags */
vsession->flags = 0;
if(is_log_level(VRS_PRINT_DEBUG_MSG)) {
printf("%c[%d;%dm", 27, 1, 31);
v_print_log(VRS_PRINT_DEBUG_MSG, "Server WebSocket state: LISTEN\n");
printf("%c[%dm", 27, 0);
}
free(C);
C = NULL;
pthread_exit(NULL);
return NULL;
}
/**
* \brief WebSocket callback function for received message
*/
void vs_ws_recv_msg_callback(wslay_event_context_ptr wslay_ctx,
const struct wslay_event_on_msg_recv_arg *arg,
void *user_data)
{
struct vContext *C = (struct vContext*)user_data;
struct VS_CTX *vs_ctx = CTX_server_ctx(C);
struct VSession *session = CTX_current_session(C);
struct IO_CTX *io_ctx = CTX_io_ctx(C);
int ret;
if(!wslay_is_ctrl_frame(arg->opcode)) {
/* Verse server uses only binary message for communication */
if(arg->opcode == WSLAY_BINARY_FRAME) {
struct wslay_event_msg msgarg;
#if DEBUG_WEB_SOCKET
unsigned int i;
v_print_log(VRS_PRINT_DEBUG_MSG,
"WS Callback received binary message\n");
v_print_log(VRS_PRINT_DEBUG_MSG,
"Binary dump\n");
/* Print dump of received data */
for(i=0; i<arg->msg_length; i++) {
v_print_log_simple(VRS_PRINT_DEBUG_MSG, "%d,", arg->msg[i]);
}
v_print_log_simple(VRS_PRINT_DEBUG_MSG, "\n");
#endif
/* Copy received data to IO context */
memcpy(io_ctx->buf, arg->msg, arg->msg_length);
io_ctx->buf_size = arg->msg_length;
if(session->stream_conn->host_state == TCP_SERVER_STATE_STREAM_OPEN) {
if(v_STREAM_handle_messages(C) != 0) {
/* When some payload data were received, then poke data thread */
sem_post(vs_ctx->data.sem);
} else {
/* End connection */
session->stream_conn->host_state = TCP_SERVER_STATE_CLOSING;
/* Try to close connection with WebSocket client */
wslay_event_queue_close(wslay_ctx,
WSLAY_CODE_PROTOCOL_ERROR,
(uint8_t*)"Wrong command", /* Close message */
13); /* The length of close message */
return;
}
} else {
if( vs_handle_handshake(C) == -1 ) {
/* End connection */
session->stream_conn->host_state = TCP_SERVER_STATE_CLOSING;
/* Try to close connection with WebSocket client */
wslay_event_queue_close(wslay_ctx,
WSLAY_CODE_PROTOCOL_ERROR,
(uint8_t*)"Wrong command", /* Close message */
13); /* The length of close message */
return;
}
/* During handshake send response immediately. */
/* TODO: optionally send message fragmented, when it is needed using:
* wslay_event_queue_fragmented_msg() */
msgarg.opcode = WSLAY_BINARY_FRAME;
msgarg.msg = (uint8_t*)io_ctx->buf;
msgarg.msg_length = io_ctx->buf_size;
/* Queue message for sending */
if((ret = wslay_event_queue_msg(wslay_ctx, &msgarg)) != 0) {
v_print_log(VRS_PRINT_ERROR,
"Unable to queue message to WebSocket: %d\n", ret);
return;
} else {
v_print_log(VRS_PRINT_DEBUG_MSG,
"WebSocket message successfully queued\n");
}
}
} else if(arg->opcode == WSLAY_TEXT_FRAME) {
v_print_log(VRS_PRINT_ERROR, "WebSocket text frame is not supported\n");
return;
}
} else {
/* Print opcode of control message */
v_print_log(VRS_PRINT_DEBUG_MSG,
"WS Callback Received Ctrl Message: opcode: %d\n",
arg->opcode);
/* Is it closing message? */
if(arg->opcode & WSLAY_CONNECTION_CLOSE) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"Close message with code: %d, message: %s\n",
arg->status_code,
arg->msg);
/* When this control message was received at second time, then
* switch to the state CLOSED. Otherwise switch to the state
* CLOSING */
if(session->stream_conn->host_state == TCP_SERVER_STATE_CLOSING) {
session->stream_conn->host_state = TCP_SERVER_STATE_CLOSED;
} else {
session->stream_conn->host_state = TCP_SERVER_STATE_CLOSING;
/* When server wasn't in the state closing, then send
* confirmation to the client, that this connection will be
* closed */
wslay_event_queue_close(wslay_ctx,
WSLAY_CODE_NORMAL_CLOSURE,
(uint8_t*)"Closing connection",
15);
}
}
}
}
/**
* \brief Main function for new thread. This thread is created for new
* connection with client. This thread will try to authenticate new user
* and negotiate new udp port. */
void *vs_tcp_conn_loop(void *arg)
{
struct vContext *C = (struct vContext*)arg;
struct VS_CTX *vs_ctx = CTX_server_ctx(C);
struct VSession *vsession = CTX_current_session(C);
struct IO_CTX *io_ctx = CTX_io_ctx(C);
struct VStreamConn *stream_conn = CTX_current_stream_conn(C);
struct VMessage *r_message=NULL, *s_message=NULL;
struct timeval tv;
fd_set set;
int error, ret;
void *udp_thread_result;
unsigned int int_size;
/* Try to get size of TCP buffer */
int_size = sizeof(int_size);
getsockopt(io_ctx->sockfd, SOL_SOCKET, SO_RCVBUF,
(void *)&stream_conn->socket_buffer_size, &int_size);
#ifdef WITH_OPENSSL
/* Try to do TLS handshake with client */
if(vs_TLS_handshake(C)!=1) {
goto end;
}
#endif
r_message = (struct VMessage*)calloc(1, sizeof(struct VMessage));
s_message = (struct VMessage*)calloc(1, sizeof(struct VMessage));
CTX_r_message_set(C, r_message);
CTX_s_message_set(C, s_message);
stream_conn->host_state = TCP_SERVER_STATE_RESPOND_METHODS;
if(is_log_level(VRS_PRINT_DEBUG_MSG)) {
printf("%c[%d;%dm", 27, 1, 31);
v_print_log(VRS_PRINT_DEBUG_MSG, "Server TCP state: RESPOND_methods\n");
printf("%c[%dm", 27, 0);
}
/* "Never ending" loop */
while(1)
{
FD_ZERO(&set);
FD_SET(io_ctx->sockfd, &set);
tv.tv_sec = VRS_TIMEOUT; /* User have to send something in 30 seconds */
tv.tv_usec = 0;
if( (ret = select(io_ctx->sockfd+1, &set, NULL, NULL, &tv)) == -1) {
if(is_log_level(VRS_PRINT_ERROR)) v_print_log(VRS_PRINT_ERROR, "%s:%s():%d select(): %s\n",
__FILE__, __FUNCTION__, __LINE__, strerror(errno));
goto end;
/* Was event on the listen socket */
} else if(ret>0 && FD_ISSET(io_ctx->sockfd, &set)) {
/* Try to receive data through TCP connection */
if( v_tcp_read(io_ctx, &error) <= 0 ) {
goto end;
}
/* Handle verse handshake at TCP connection */
if( (ret = vs_handle_handshake(C)) == -1) {
goto end;
}
/* When there is something to send, then send it to peer */
if( ret == 1 ) {
/* Send response message to the client */
if( (ret = v_tcp_write(io_ctx, &error)) <= 0) {
goto end;
}
}
} else {
if(is_log_level(VRS_PRINT_ERROR)) v_print_log(VRS_PRINT_ERROR, "No response in %d seconds\n", VRS_TIMEOUT);
goto end;
}
}
end:
if(is_log_level(VRS_PRINT_DEBUG_MSG)) {
printf("%c[%d;%dm", 27, 1, 31);
v_print_log(VRS_PRINT_DEBUG_MSG, "Server TCP state: CLOSING\n");
printf("%c[%dm", 27, 0);
}
/* Set up TCP CLOSING state (non-blocking) */
vs_CLOSING(C);
/* Receive and Send messages are not neccessary any more */
if(r_message != NULL) {
free(r_message);
r_message = NULL;
CTX_r_message_set(C, NULL);
}
if(s_message != NULL) {
free(s_message);
s_message = NULL;
CTX_s_message_set(C, NULL);
}
/* TCP connection is considered as CLOSED, but it is not possible to use
* this connection for other client */
stream_conn->host_state = TCP_SERVER_STATE_CLOSED;
/* NULL pointer at stream connection */
CTX_current_stream_conn_set(C, NULL);
/* Set TCP connection to CLOSED */
if(is_log_level(VRS_PRINT_DEBUG_MSG)) {
printf("%c[%d;%dm", 27, 1, 31);
v_print_log(VRS_PRINT_DEBUG_MSG, "Server TCP state: CLOSED\n");
printf("%c[%dm", 27, 0);
}
/* Was udp thread created? */
if(vsession->udp_thread != 0 ) {
/* Wait for UDP thread (this is blocking operation) */
v_print_log(VRS_PRINT_DEBUG_MSG, "Waiting for join with UDP thread ...\n");
if(pthread_join(vsession->udp_thread, &udp_thread_result) != 0) {
v_print_log(VRS_PRINT_DEBUG_MSG, "UDP thread was not joined\n");
}
}
pthread_mutex_lock(&vs_ctx->data.mutex);
/* Unsubscribe this session (this avatar) from all nodes */
vs_node_free_avatar_reference(vs_ctx, vsession);
/* Try to destroy avatar node */
vs_node_destroy_avatar_node(vs_ctx, vsession);
pthread_mutex_unlock(&vs_ctx->data.mutex);
/* This session could be used again for authentication */
stream_conn->host_state = TCP_SERVER_STATE_LISTEN;
/* Clear session flags */
vsession->flags = 0;
if(vsession->peer_cookie.str != NULL) {
free(vsession->peer_cookie.str);
vsession->peer_cookie.str = NULL;
}
if(vsession->ded.str != NULL) {
free(vsession->ded.str);
vsession->ded.str = NULL;
}
if(vsession->client_name != NULL) {
free(vsession->client_name);
vsession->client_name = NULL;
}
if(vsession->client_version != NULL) {
free(vsession->client_version);
vsession->client_version = NULL;
}
if(is_log_level(VRS_PRINT_DEBUG_MSG)) {
printf("%c[%d;%dm", 27, 1, 31);
v_print_log(VRS_PRINT_DEBUG_MSG, "Server TCP state: LISTEN\n");
printf("%c[%dm", 27, 0);
}
free(C);
C = NULL;
pthread_exit(NULL);
return NULL;
}
/**
* \brief This connection tries to handle new connection attempt. When this
* attempt is successful, then it creates new thread
*/
static int vs_new_stream_conn(struct vContext *C, void *(*conn_loop)(void*))
{
VS_CTX *vs_ctx = CTX_server_ctx(C);
struct IO_CTX *io_ctx = CTX_io_ctx(C);
struct VSession *current_session = NULL;
socklen_t addr_len;
int ret, i;
static uint32 last_session_id = 0;
/* Try to find free session */
for(i=0; i< vs_ctx->max_sessions; i++) {
if(vs_ctx->vsessions[i]->stream_conn->host_state == TCP_SERVER_STATE_LISTEN) {
/* TODO: lock mutex here */
current_session = vs_ctx->vsessions[i];
current_session->stream_conn->host_state = TCP_SERVER_STATE_RESPOND_METHODS;
current_session->session_id = last_session_id++;
/* TODO: unlock mutex here */
break;
}
}
if(current_session != NULL) {
struct vContext *new_C;
int flag;
/* Try to accept client connection (do TCP handshake) */
if(io_ctx->host_addr.ip_ver==IPV4) {
/* Prepare IPv4 variables for TCP handshake */
struct sockaddr_in *client_addr4 = ¤t_session->stream_conn->io_ctx.peer_addr.addr.ipv4;
current_session->stream_conn->io_ctx.peer_addr.ip_ver = IPV4;
addr_len = sizeof(current_session->stream_conn->io_ctx.peer_addr.addr.ipv4);
/* Try to do TCP handshake */
if( (current_session->stream_conn->io_ctx.sockfd = accept(io_ctx->sockfd, (struct sockaddr*)client_addr4, &addr_len)) == -1) {
if(is_log_level(VRS_PRINT_ERROR)) v_print_log(VRS_PRINT_ERROR, "accept(): %s\n", strerror(errno));
return 0;
}
/* Save the IPv4 of the client as string in verse session */
inet_ntop(AF_INET, &client_addr4->sin_addr, current_session->peer_hostname, INET_ADDRSTRLEN);
} else if(io_ctx->host_addr.ip_ver==IPV6) {
/* Prepare IPv6 variables for TCP handshake */
struct sockaddr_in6 *client_addr6 = ¤t_session->stream_conn->io_ctx.peer_addr.addr.ipv6;
current_session->stream_conn->io_ctx.peer_addr.ip_ver = IPV6;
addr_len = sizeof(current_session->stream_conn->io_ctx.peer_addr.addr.ipv6);
/* Try to do TCP handshake */
if( (current_session->stream_conn->io_ctx.sockfd = accept(io_ctx->sockfd, (struct sockaddr*)client_addr6, &addr_len)) == -1) {
if(is_log_level(VRS_PRINT_ERROR)) v_print_log(VRS_PRINT_ERROR, "accept(): %s\n", strerror(errno));
return 0;
}
/* Save the IPv6 of the client as string in verse session */
inet_ntop(AF_INET6, &client_addr6->sin6_addr, current_session->peer_hostname, INET6_ADDRSTRLEN);
}
/* Set to this socket flag "no delay" */
flag = 1;
if(setsockopt(current_session->stream_conn->io_ctx.sockfd,
IPPROTO_TCP, TCP_NODELAY, &flag, (socklen_t)sizeof(flag)) == -1)
{
if(is_log_level(VRS_PRINT_ERROR)) {
v_print_log(VRS_PRINT_ERROR,
"setsockopt: TCP_NODELAY: %d\n",
strerror(errno));
}
return -1;;
}
CTX_current_session_set(C, current_session);
CTX_current_stream_conn_set(C, current_session->stream_conn);
CTX_io_ctx_set(C, ¤t_session->stream_conn->io_ctx);
if(is_log_level(VRS_PRINT_DEBUG_MSG)) {
v_print_log(VRS_PRINT_DEBUG_MSG, "New connection from: ");
v_print_addr_port(VRS_PRINT_DEBUG_MSG, &(current_session->stream_conn->io_ctx.peer_addr));
v_print_log_simple(VRS_PRINT_DEBUG_MSG, "\n");
}
/* Duplicate verse context for new thread */
new_C = (struct vContext*)calloc(1, sizeof(struct vContext));
memcpy(new_C, C, sizeof(struct vContext));
/* Try to initialize thread attributes */
if( (ret = pthread_attr_init(¤t_session->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 0;
}
/* Try to set thread attributes as detached */
if( (ret = pthread_attr_setdetachstate(¤t_session->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 0;
}
/* Try to create new thread */
if((ret = pthread_create(¤t_session->tcp_thread, ¤t_session->tcp_thread_attr, conn_loop, (void*)new_C)) != 0) {
if(is_log_level(VRS_PRINT_ERROR)) v_print_log(VRS_PRINT_ERROR, "pthread_create(): %s\n", strerror(errno));
}
/* Destroy thread attributes */
pthread_attr_destroy(¤t_session->tcp_thread_attr);
} else {
int tmp_sockfd;
v_print_log(VRS_PRINT_DEBUG_MSG, "Number of session slot: %d reached\n", vs_ctx->max_sessions);
/* TODO: return some error. Not only accept and close connection. */
/* Try to accept client connection (do TCP handshake) */
if(io_ctx->host_addr.ip_ver == IPV4) {
/* Prepare IP6 variables for TCP handshake */
struct sockaddr_in client_addr4;
addr_len = sizeof(client_addr4);
/* Try to do TCP handshake */
if( (tmp_sockfd = accept(io_ctx->sockfd, (struct sockaddr*)&client_addr4, &addr_len)) == -1) {
if(is_log_level(VRS_PRINT_ERROR)) v_print_log(VRS_PRINT_ERROR, "accept(): %s\n", strerror(errno));
return 0;
}
/* Close connection (no more free session slots) */
close(tmp_sockfd);
} else if(io_ctx->host_addr.ip_ver == IPV6) {
/* Prepare IP6 variables for TCP handshake */
struct sockaddr_in6 client_addr6;
addr_len = sizeof(client_addr6);
/* Try to do TCP handshake */
if( (tmp_sockfd = accept(io_ctx->sockfd, (struct sockaddr*)&client_addr6, &addr_len)) == -1) {
if(is_log_level(VRS_PRINT_ERROR)) v_print_log(VRS_PRINT_ERROR, "accept(): %s\n", strerror(errno));
return 0;
}
/* Close connection (no more free session slots) */
close(tmp_sockfd);
}
/* TODO: Fix this */
sleep(1);
}
return 1;
}
