static int request_recv(struct knot_request *request,
const struct timeval *timeout)
{
knot_pkt_t *resp = request->resp;
knot_pkt_clear(resp);
/* Each request has unique timeout. */
struct timeval tv = { timeout->tv_sec, timeout->tv_usec };
/* Wait for readability */
int ret = request_ensure_connected(request);
if (ret != KNOT_EOK) {
return ret;
}
/* Receive it */
if (use_tcp(request)) {
ret = tcp_recv_msg(request->fd, resp->wire, resp->max_size, &tv);
} else {
ret = udp_recv_msg(request->fd, resp->wire, resp->max_size, &tv);
}
if (ret <= 0) {
resp->size = 0;
if (ret == 0) {
return KNOT_ECONN;
}
return ret;
}
resp->size = ret;
return ret;
}
static void* responder_thread(void *arg)
{
int fd = *((int *)arg);
uint8_t buf[KNOT_WIRE_MAX_PKTSIZE];
while(true) {
int client = accept(fd, NULL, NULL);
if (client < 0) {
break;
}
int len = tcp_recv_msg(client, buf, sizeof(buf), NULL);
if (len < KNOT_WIRE_HEADER_SIZE) {
close(client);
break;
}
knot_wire_set_qr(buf);
tcp_send_msg(client, buf, len, NULL);
close(client);
}
return NULL;
}
void ServerConnection::receive() {
int res = tcp_recv_msg(conn.dia_conn, &conn.rb,
0, CONN_WAIT_USECS);
if (res < 0) {
if (res == AAA_CONN_SHUTDOWN) {
INFO( M_NAME "receive(): shutdown - closing connection.\n");
closeConnection(true);
} else {
closeConnection();
ERROR( M_NAME "receive(): tcp_recv_reply() failed.\n");
}
return;
}
if (!res) // nothing received
return;
/* obtain the structure corresponding to the message */
AAAMessage* msg = AAATranslateMessage(conn.rb.buf, conn.rb.buf_len, 0);
if(!msg) {
ERROR( M_NAME "receive(): message structure not obtained from message.\n");
closeConnection();
return;
}
#ifdef EXTRA_DEBUG
AAAPrintMessage(msg);
#endif
if (is_req(msg))
handleRequest(msg);
else
handleReply(msg);
AAAFreeMessage(&msg);
}
void ServerConnection::openConnection() {
DBG("init TCP connection\n");
if (conn.dia_conn) {
ERROR("CRITICAL: trying to open new connection, while current one still"
" opened.\n");
abort();
}
conn.dia_conn = tcp_create_connection(server_name.c_str(), server_port,
ca_file.c_str(), cert_file.c_str());
if (!conn.dia_conn) {
ERROR("establishing connection to %s\n",
server_name.c_str());
setRetryConnectLater();
return;
}
// send CER
AAAMessage* cer;
if ((cer=AAAInMessage(AAA_CC_CER, AAA_APP_DIAMETER_COMMON_MSG))==NULL) {
ERROR(M_NAME":openConnection(): can't create new "
"CER AAA message!\n");
conn.terminate();
setRetryConnectLater();
return;
}
if (addOrigin(cer)
|| addDataAVP(cer, AVP_Host_IP_Address, origin_ip_address, sizeof(origin_ip_address))
|| addDataAVP(cer, AVP_Vendor_Id, (char*)&vendorID, sizeof(vendorID))
|| addDataAVP(cer, AVP_Supported_Vendor_Id, (char*)&vendorID, sizeof(vendorID))
|| addStringAVP(cer, AVP_Product_Name, product_name)) {
ERROR("openConnection(): adding AVPs failed\n");
conn.terminate();
setRetryConnectLater();
return;
}
// supported applications
AAA_AVP* vs_appid;
if( (vs_appid=AAACreateAVP(AVP_Vendor_Specific_Application_Id, (AAA_AVPFlag)AAA_AVP_FLAG_NONE, 0, 0,
0, AVP_DONT_FREE_DATA)) == 0) {
ERROR( M_NAME":openConnection(): creating AVP failed."
" (no more free memory!)\n");
conn.terminate();
setRetryConnectLater();
return;
}
// feels like c coding...
if (addGroupedAVP(vs_appid, AVP_Auth_Application_Id,
(char*)&app_id, sizeof(app_id)) ||
addGroupedAVP(vs_appid, AVP_Vendor_Id,
(char*)&vendorID, sizeof(vendorID)) ||
(AAAAddAVPToMessage(cer, vs_appid, 0) != AAA_ERR_SUCCESS)
) {
ERROR( M_NAME":openConnection(): creating AVP failed."
" (no more free memory!)\n");
conn.terminate();
setRetryConnectLater();
return;
}
#ifdef EXTRA_DEBUG
AAAPrintMessage(cer);
#endif
conn.setIDs(cer);
if(AAABuildMsgBuffer(cer) != AAA_ERR_SUCCESS) {
ERROR( " openConnection(): message buffer not created\n");
AAAFreeMessage(&cer);
return;
}
int ret = tcp_send(conn.dia_conn, cer->buf.s, cer->buf.len);
if (ret) {
ERROR( "openConnection(): could not send message\n");
conn.terminate();
setRetryConnectLater();
AAAFreeMessage(&cer);
return;
}
AAAFreeMessage(&cer);
unsigned int cea_receive_cnt = 3;
while (true) {
int res = tcp_recv_msg(conn.dia_conn, &conn.rb,
CONNECT_CEA_REPLY_TIMEOUT, 0);
if (res <= 0) {
if (!res) {
ERROR( " openConnection(): did not receive response (CEA).\n");
} else {
ERROR( " openConnection(): error receiving response (CEA).\n");
}
conn.terminate();
setRetryConnectLater();
return;
}
/* obtain the structure corresponding to the message */
AAAMessage* cea = AAATranslateMessage(conn.rb.buf, conn.rb.buf_len, 0);
if(!cea) {
ERROR( " openConnection(): could not decipher response (CEA).\n");
conn.terminate();
setRetryConnectLater();
return;
}
if (cea->commandCode == AAA_CC_CEA) {
#ifdef EXTRA_DEBUG
AAAPrintMessage(cea);
#endif
AAAFreeMessage(&cea);
break;
}
AAAFreeMessage(&cea);
if (!(cea_receive_cnt--)) {
ERROR( " openConnection(): no CEA received.\n");
conn.terminate();
setRetryConnectLater();
return;
}
}
DBG("Connection opened.\n");
open = true;
}
/*!
* \brief TCP event handler function.
*/
static int tcp_handle(tcp_context_t *tcp, int fd,
struct iovec *rx, struct iovec *tx)
{
/* Create query processing parameter. */
struct sockaddr_storage ss;
memset(&ss, 0, sizeof(struct sockaddr_storage));
struct process_query_param param = {0};
param.socket = fd;
param.remote = &ss;
param.server = tcp->server;
param.thread_id = tcp->thread_id;
rx->iov_len = KNOT_WIRE_MAX_PKTSIZE;
tx->iov_len = KNOT_WIRE_MAX_PKTSIZE;
/* Receive peer name. */
socklen_t addrlen = sizeof(struct sockaddr_storage);
if (getpeername(fd, (struct sockaddr *)&ss, &addrlen) < 0) {
;
}
/* Timeout. */
struct timeval tmout = { conf()->max_conn_reply, 0 };
/* Receive data. */
int ret = tcp_recv_msg(fd, rx->iov_base, rx->iov_len, &tmout);
if (ret <= 0) {
dbg_net("tcp: client on fd=%d disconnected\n", fd);
if (ret == KNOT_EAGAIN) {
rcu_read_lock();
char addr_str[SOCKADDR_STRLEN] = {0};
sockaddr_tostr(addr_str, sizeof(addr_str), &ss);
log_warning("connection timed out, address '%s', "
"timeout %d seconds",
addr_str, conf()->max_conn_idle);
rcu_read_unlock();
}
return KNOT_ECONNREFUSED;
} else {
rx->iov_len = ret;
}
/* Create packets. */
mm_ctx_t *mm = tcp->overlay.mm;
knot_pkt_t *ans = knot_pkt_new(tx->iov_base, tx->iov_len, mm);
knot_pkt_t *query = knot_pkt_new(rx->iov_base, rx->iov_len, mm);
/* Initialize processing overlay. */
knot_overlay_init(&tcp->overlay, mm);
knot_overlay_add(&tcp->overlay, NS_PROC_QUERY, ¶m);
/* Input packet. */
int state = knot_overlay_in(&tcp->overlay, query);
/* Resolve until NOOP or finished. */
ret = KNOT_EOK;
while (state & (KNOT_NS_PROC_FULL|KNOT_NS_PROC_FAIL)) {
state = knot_overlay_out(&tcp->overlay, ans);
/* Send, if response generation passed and wasn't ignored. */
if (ans->size > 0 && !(state & (KNOT_NS_PROC_FAIL|KNOT_NS_PROC_NOOP))) {
if (tcp_send_msg(fd, ans->wire, ans->size) != ans->size) {
ret = KNOT_ECONNREFUSED;
break;
}
}
}
/* Reset after processing. */
knot_overlay_finish(&tcp->overlay);
knot_overlay_deinit(&tcp->overlay);
/* Cleanup. */
knot_pkt_free(&query);
knot_pkt_free(&ans);
return ret;
}
