1 /* ****************************************************************
3 * Copyright 2015 Samsung Electronics All Rights Reserved.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
19 ******************************************************************/
21 #include <sys/types.h>
22 #include <sys/socket.h>
23 #include <sys/select.h>
24 #include <sys/ioctl.h>
29 #include <arpa/inet.h>
30 #include <netinet/in.h>
35 #include <sys/socket.h>
36 #include <netinet/in.h>
40 #include "catcpinterface.h"
41 #include "caipnwmonitor.h"
43 #include "caadapterutils.h"
45 #include "oic_malloc.h"
48 #include "ca_adapter_net_ssl.h"
52 * Logging tag for module name.
54 #define TAG "OIC_CA_TCP_SERVER"
57 * Maximum CoAP over TCP header length
58 * to know the total data length.
60 #define COAP_MAX_HEADER_SIZE 6
65 #define TLS_HEADER_SIZE 5
68 * Mutex to synchronize device object list.
70 static ca_mutex g_mutexObjectList = NULL;
73 * Conditional mutex to synchronize.
75 static ca_cond g_condObjectList = NULL;
78 * Maintains the callback to be notified when data received from remote device.
80 static CATCPPacketReceivedCallback g_packetReceivedCallback = NULL;
83 * Error callback to update error in TCP.
85 static CATCPErrorHandleCallback g_tcpErrorHandler = NULL;
88 * Connected Callback to pass the connection information to RI.
90 static CATCPConnectionHandleCallback g_connectionCallback = NULL;
92 static CAResult_t CATCPCreateMutex();
93 static void CATCPDestroyMutex();
94 static CAResult_t CATCPCreateCond();
95 static void CATCPDestroyCond();
96 static int CACreateAcceptSocket(int family, CASocket_t *sock);
97 static void CAAcceptConnection(CATransportFlags_t flag, CASocket_t *sock);
98 static void CAFindReadyMessage();
99 static void CASelectReturned(fd_set *readFds);
100 static void CAReceiveMessage(int fd);
101 static void CAReceiveHandler(void *data);
102 static CAResult_t CATCPCreateSocket(int family, CATCPSessionInfo_t *tcpServerInfo);
104 #define CHECKFD(FD) \
105 if (FD > caglobals.tcp.maxfd) \
106 caglobals.tcp.maxfd = FD;
109 * Read length amount of data from socket item->fd
110 * Can read less data length then requested
111 * Actual read length added to item->len variable
113 * @param[in/out] item - used socket, buffer and to update received message length
114 * @param[in] length - length of data required to read
115 * @param[in] flags - additional info about socket
116 * @return - CA_STATUS_OK or appropriate error code
118 static CAResult_t CARecv(CATCPSessionInfo_t *item, size_t length, int flags)
122 return CA_STATUS_INVALID_PARAM;
125 //skip read operation if requested zero length
131 unsigned char *buffer = item->data + item->len;
133 int len = recv(item->fd, buffer, length, flags);
137 OIC_LOG_V(ERROR, TAG, "recv failed %s", strerror(errno));
138 return CA_RECEIVE_FAILED;
142 OIC_LOG(INFO, TAG, "Received disconnect from peer. Close connection");
143 item->state = DISCONNECTED;
144 return CA_DESTINATION_DISCONNECTED;
147 OIC_LOG_V(DEBUG, TAG, "recv len = %d", len);
148 OIC_LOG_BUFFER(DEBUG, TAG, buffer, len);
155 static void CATCPDestroyMutex()
157 if (g_mutexObjectList)
159 ca_mutex_free(g_mutexObjectList);
160 g_mutexObjectList = NULL;
164 static CAResult_t CATCPCreateMutex()
166 if (!g_mutexObjectList)
168 g_mutexObjectList = ca_mutex_new();
169 if (!g_mutexObjectList)
171 OIC_LOG(ERROR, TAG, "Failed to created mutex!");
172 return CA_STATUS_FAILED;
179 static void CATCPDestroyCond()
181 if (g_condObjectList)
183 ca_cond_free(g_condObjectList);
184 g_condObjectList = NULL;
188 static CAResult_t CATCPCreateCond()
190 if (!g_condObjectList)
192 g_condObjectList = ca_cond_new();
193 if (!g_condObjectList)
195 OIC_LOG(ERROR, TAG, "Failed to created cond!");
196 return CA_STATUS_FAILED;
202 static void CAReceiveHandler(void *data)
205 OIC_LOG(DEBUG, TAG, "IN - CAReceiveHandler");
207 while (!caglobals.tcp.terminate)
209 CAFindReadyMessage();
212 ca_mutex_lock(g_mutexObjectList);
213 ca_cond_signal(g_condObjectList);
214 ca_mutex_unlock(g_mutexObjectList);
216 OIC_LOG(DEBUG, TAG, "OUT - CAReceiveHandler");
219 static void CAFindReadyMessage()
222 struct timeval timeout = { .tv_sec = caglobals.tcp.selectTimeout };
226 if (-1 != caglobals.tcp.ipv4.fd)
228 FD_SET(caglobals.tcp.ipv4.fd, &readFds);
230 if (-1 != caglobals.tcp.ipv6.fd)
232 FD_SET(caglobals.tcp.ipv6.fd, &readFds);
234 if (-1 != caglobals.tcp.shutdownFds[0])
236 FD_SET(caglobals.tcp.shutdownFds[0], &readFds);
238 if (-1 != caglobals.tcp.connectionFds[0])
240 FD_SET(caglobals.tcp.connectionFds[0], &readFds);
243 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
244 for (size_t i = 0; i < length; i++)
246 CATCPSessionInfo_t *svritem =
247 (CATCPSessionInfo_t *) u_arraylist_get(caglobals.tcp.svrlist, i);
248 if (svritem && 0 <= svritem->fd && CONNECTED == svritem->state)
250 FD_SET(svritem->fd, &readFds);
254 int ret = select(caglobals.tcp.maxfd + 1, &readFds, NULL, NULL, &timeout);
256 if (caglobals.tcp.terminate)
258 OIC_LOG_V(DEBUG, TAG, "Packet receiver Stop request received.");
264 CASelectReturned(&readFds);
268 OIC_LOG_V(FATAL, TAG, "select error %s", strerror(errno));
272 static void CASelectReturned(fd_set *readFds)
274 VERIFY_NON_NULL_VOID(readFds, TAG, "readFds is NULL");
276 if (caglobals.tcp.ipv4.fd != -1 && FD_ISSET(caglobals.tcp.ipv4.fd, readFds))
278 CAAcceptConnection(CA_IPV4, &caglobals.tcp.ipv4);
281 else if (caglobals.tcp.ipv6.fd != -1 && FD_ISSET(caglobals.tcp.ipv6.fd, readFds))
283 CAAcceptConnection(CA_IPV6, &caglobals.tcp.ipv6);
286 else if (-1 != caglobals.tcp.connectionFds[0] &&
287 FD_ISSET(caglobals.tcp.connectionFds[0], readFds))
289 // new connection was created from remote device.
290 // exit the function to update read file descriptor.
291 char buf[MAX_ADDR_STR_SIZE_CA] = {0};
292 ssize_t len = read(caglobals.tcp.connectionFds[0], buf, sizeof (buf));
297 OIC_LOG_V(DEBUG, TAG, "Received new connection event with [%s]", buf);
298 FD_CLR(caglobals.tcp.connectionFds[0], readFds);
303 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
304 for (size_t i = 0; i < length; i++)
306 CATCPSessionInfo_t *svritem =
307 (CATCPSessionInfo_t *) u_arraylist_get(caglobals.tcp.svrlist, i);
308 if (svritem && svritem->fd >= 0)
310 if (FD_ISSET(svritem->fd, readFds))
312 CAReceiveMessage(svritem->fd);
313 if (-1 != svritem->fd)
315 FD_CLR(svritem->fd, readFds);
323 static void CAAcceptConnection(CATransportFlags_t flag, CASocket_t *sock)
325 VERIFY_NON_NULL_VOID(sock, TAG, "sock is NULL");
327 struct sockaddr_storage clientaddr;
328 socklen_t clientlen = sizeof (struct sockaddr_in);
331 clientlen = sizeof(struct sockaddr_in6);
334 int sockfd = accept(sock->fd, (struct sockaddr *)&clientaddr, &clientlen);
337 CATCPSessionInfo_t *svritem =
338 (CATCPSessionInfo_t *) OICCalloc(1, sizeof (*svritem));
341 OIC_LOG(ERROR, TAG, "Out of memory");
346 svritem->fd = sockfd;
347 svritem->sep.endpoint.flags = flag;
348 svritem->sep.endpoint.adapter = CA_ADAPTER_TCP;
349 svritem->state = CONNECTED;
350 CAConvertAddrToName((struct sockaddr_storage *)&clientaddr, clientlen,
351 svritem->sep.endpoint.addr, &svritem->sep.endpoint.port);
353 ca_mutex_lock(g_mutexObjectList);
354 bool result = u_arraylist_add(caglobals.tcp.svrlist, svritem);
357 OIC_LOG(ERROR, TAG, "u_arraylist_add failed.");
360 ca_mutex_unlock(g_mutexObjectList);
363 ca_mutex_unlock(g_mutexObjectList);
370 static bool CAIsTlsMessage(const unsigned char* data, size_t length)
372 if (NULL == data || 0 == length)
374 OIC_LOG_V(ERROR, TAG, "%s: null input param", __func__);
378 unsigned char first_byte = data[0];
380 //TLS Plaintext has four types: change_cipher_spec = [14], alert = [15],
381 //handshake = [16], application_data = [17] in HEX
382 const uint8_t tls_head_type[] = {0x14, 0x15, 0x16, 0x17};
385 for (i = 0; i < sizeof(tls_head_type); i++)
387 if(tls_head_type[i] == first_byte)
398 * Clean socket state data
400 * @param[in/out] item - socket state data
402 static void CACleanData(CATCPSessionInfo_t *svritem)
406 OICFree(svritem->data);
407 svritem->data = NULL;
409 svritem->totalLen = 0;
410 svritem->protocol = UNKNOWN;
415 * Read message header from socket item->fd
417 * @param[in/out] item - used socket, buffer, current received message length and protocol
418 * @return - CA_STATUS_OK or appropriate error code
420 static CAResult_t CAReadHeader(CATCPSessionInfo_t *svritem)
422 CAResult_t res = CA_STATUS_OK;
426 return CA_STATUS_INVALID_PARAM;
429 if (NULL == svritem->data)
431 // allocate memory for message header (CoAP header size because it is bigger)
432 svritem->data = (unsigned char *) OICCalloc(1, COAP_MAX_HEADER_SIZE);
433 if (NULL == svritem->data)
435 OIC_LOG(ERROR, TAG, "OICCalloc - out of memory");
436 return CA_MEMORY_ALLOC_FAILED;
440 //read data (assume TLS header) from remote device.
441 //use TLS_HEADER_SIZE - svritem->len because even header can be read partially
442 res = CARecv(svritem, TLS_HEADER_SIZE - svritem->len, 0);
444 //return if any error occurs
445 if (CA_STATUS_OK != res)
450 //if not enough data received - read them on next CAReceiveMessage() call
451 if (svritem->len < TLS_HEADER_SIZE)
453 OIC_LOG(DEBUG, TAG, "Header received partially. Wait for rest header data");
457 //if enough data received - parse header
459 if (CAIsTlsMessage(svritem->data, svritem->len))
461 svritem->protocol = TLS;
463 //[3][4] bytes in tls header are tls payload length
464 unsigned int message_length = (unsigned int)((svritem->data[3] << 8) | svritem->data[4]);
465 OIC_LOG_V(DEBUG, TAG, "%s: message_length = %d", __func__, message_length);
467 svritem->totalLen = message_length + TLS_HEADER_SIZE;
472 svritem->protocol = COAP;
474 //seems CoAP data received. read full coap header.
475 coap_transport_t transport = coap_get_tcp_header_type_from_initbyte(svritem->data[0] >> 4);
477 size_t headerLen = coap_get_tcp_header_length_for_transport(transport);
479 if (svritem->len < headerLen)
481 //read required bytes to have full CoAP header
482 //it should be 1 byte (COAP_MAX_HEADER_SIZE - TLS_HEADER_SIZE)
483 res = CARecv(svritem, headerLen - svritem->len, 0);
485 //return if any error occurs
486 if (CA_STATUS_OK != res)
491 //if not enough data received - read them on next CAReceiveMessage() call
492 if (svritem->len < headerLen)
494 OIC_LOG(DEBUG, TAG, "CoAP header received partially. Wait for rest header data");
499 //calculate CoAP message length
500 svritem->totalLen = CAGetTotalLengthFromHeader(svritem->data);
503 unsigned char *buffer = OICRealloc(svritem->data, svritem->totalLen);
506 OIC_LOG(ERROR, TAG, "OICRealloc - out of memory");
507 return CA_MEMORY_ALLOC_FAILED;
509 svritem->data = buffer;
515 * Read message payload from socket item->fd
518 * @param[in/out] item - used socket, buffer and to update received message length
519 * @return - CA_STATUS_OK or appropriate error code
521 static CAResult_t CAReadPayload(CATCPSessionInfo_t *svritem)
525 return CA_STATUS_INVALID_PARAM;
528 return CARecv(svritem, svritem->totalLen - svritem->len, 0);
532 * Pass received data to app layer depending on protocol
534 * @param[in/out] item - used buffer, received message length and protocol
536 static void CAExecuteRequest(CATCPSessionInfo_t *svritem)
543 switch(svritem->protocol)
547 if (g_packetReceivedCallback)
549 g_packetReceivedCallback(&svritem->sep, svritem->data, svritem->len);
556 int ret = CAdecryptSsl(&svritem->sep, (uint8_t *)svritem->data, svritem->len);
558 OIC_LOG_V(DEBUG, TAG, "%s: CAdecryptSsl returned %d", __func__, ret);
562 case UNKNOWN: /* pass through */
564 OIC_LOG(ERROR, TAG, "unknown application protocol. Ignore it");
569 static void CAReceiveMessage(int fd)
571 CAResult_t res = CA_STATUS_OK;
573 //get remote device information from file descriptor.
575 CATCPSessionInfo_t *svritem = CAGetSessionInfoFromFD(fd, &index);
578 OIC_LOG(ERROR, TAG, "there is no connection information in list");
582 //totalLen filled only when header fully read and parsed
583 if (0 == svritem->totalLen)
585 res = CAReadHeader(svritem);
589 res = CAReadPayload(svritem);
591 //when successfully read all required data - pass them to upper layer.
592 if (CA_STATUS_OK == res && svritem->len == svritem->totalLen)
594 CAExecuteRequest(svritem);
595 CACleanData(svritem);
599 //disconnect session and clean-up data if any error occurs
600 if (res != CA_STATUS_OK)
603 if (CA_STATUS_OK != CAcloseSslConnection(&svritem->sep.endpoint))
605 OIC_LOG(ERROR, TAG, "Failed to close TLS session");
608 CASearchAndDeleteTCPSession(&(svritem->sep.endpoint));
613 static ssize_t CAWakeUpForReadFdsUpdate(const char *host)
615 if (caglobals.tcp.connectionFds[1] != -1)
620 len = write(caglobals.tcp.connectionFds[1], host, strlen(host));
621 } while ((len == -1) && (errno == EINTR));
623 if ((len == -1) && (errno != EINTR) && (errno != EPIPE))
625 OIC_LOG_V(DEBUG, TAG, "write failed: %s", strerror(errno));
632 static CAResult_t CATCPConvertNameToAddr(int family, const char *host, uint16_t port,
633 struct sockaddr_storage *sockaddr)
635 struct addrinfo *addrs = NULL;
636 struct addrinfo hints = { .ai_family = family,
637 .ai_protocol = IPPROTO_TCP,
638 .ai_socktype = SOCK_STREAM,
639 .ai_flags = AI_NUMERICHOST };
641 int r = getaddrinfo(host, NULL, &hints, &addrs);
646 OIC_LOG_V(ERROR, TAG, "getaddrinfo failed: errno %s", strerror(errno));
650 OIC_LOG_V(ERROR, TAG, "getaddrinfo failed: %s", gai_strerror(r));
653 return CA_STATUS_FAILED;
655 // assumption: in this case, getaddrinfo will only return one addrinfo
656 // or first is the one we want.
657 if (addrs[0].ai_family == AF_INET6)
659 memcpy(sockaddr, addrs[0].ai_addr, sizeof (struct sockaddr_in6));
660 ((struct sockaddr_in6 *)sockaddr)->sin6_port = htons(port);
664 memcpy(sockaddr, addrs[0].ai_addr, sizeof (struct sockaddr_in));
665 ((struct sockaddr_in *)sockaddr)->sin_port = htons(port);
671 static CAResult_t CATCPCreateSocket(int family, CATCPSessionInfo_t *svritem)
673 // #1. create tcp socket.
674 int fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
677 OIC_LOG_V(ERROR, TAG, "create socket failed: %s", strerror(errno));
678 return CA_SOCKET_OPERATION_FAILED;
682 // #2. convert address from string to binary.
683 struct sockaddr_storage sa = { .ss_family = family };
684 CAResult_t res = CATCPConvertNameToAddr(family, svritem->sep.endpoint.addr,
685 svritem->sep.endpoint.port, &sa);
686 if (CA_STATUS_OK != res)
688 return CA_SOCKET_OPERATION_FAILED;
691 // #3. set socket length.
692 socklen_t socklen = 0;
693 if (sa.ss_family == AF_INET6)
695 struct sockaddr_in6 *sock6 = (struct sockaddr_in6 *)&sa;
696 if (!sock6->sin6_scope_id)
698 sock6->sin6_scope_id = svritem->sep.endpoint.ifindex;
700 socklen = sizeof(struct sockaddr_in6);
704 socklen = sizeof(struct sockaddr_in);
707 // #4. connect to remote server device.
708 if (connect(fd, (struct sockaddr *)&sa, socklen) < 0)
710 OIC_LOG_V(ERROR, TAG, "failed to connect socket, %s", strerror(errno));
711 return CA_SOCKET_OPERATION_FAILED;
714 OIC_LOG(DEBUG, TAG, "connect socket success");
715 svritem->state = CONNECTED;
716 CHECKFD(svritem->fd);
717 ssize_t len = CAWakeUpForReadFdsUpdate(svritem->sep.endpoint.addr);
720 return CA_SOCKET_OPERATION_FAILED;
725 static int CACreateAcceptSocket(int family, CASocket_t *sock)
727 VERIFY_NON_NULL_RET(sock, TAG, "sock", -1);
731 OIC_LOG(DEBUG, TAG, "accept socket created already");
735 socklen_t socklen = 0;
736 struct sockaddr_storage server = { .ss_family = family };
738 int fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
741 OIC_LOG(ERROR, TAG, "Failed to create socket");
745 if (family == AF_INET6)
747 // the socket is restricted to sending and receiving IPv6 packets only.
749 if (-1 == setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof (on)))
751 OIC_LOG_V(ERROR, TAG, "IPV6_V6ONLY failed: %s", strerror(errno));
754 ((struct sockaddr_in6 *)&server)->sin6_port = htons(sock->port);
755 socklen = sizeof (struct sockaddr_in6);
759 ((struct sockaddr_in *)&server)->sin_port = htons(sock->port);
760 socklen = sizeof (struct sockaddr_in);
764 if (-1 == setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)))
766 OIC_LOG(ERROR, TAG, "setsockopt SO_REUSEADDR");
770 if (-1 == bind(fd, (struct sockaddr *)&server, socklen))
772 OIC_LOG_V(ERROR, TAG, "bind socket failed: %s", strerror(errno));
776 if (listen(fd, caglobals.tcp.listenBacklog) != 0)
778 OIC_LOG(ERROR, TAG, "listen() error");
782 if (!sock->port) // return the assigned port
784 if (-1 == getsockname(fd, (struct sockaddr *)&server, &socklen))
786 OIC_LOG_V(ERROR, TAG, "getsockname failed: %s", strerror(errno));
789 sock->port = ntohs(family == AF_INET6 ?
790 ((struct sockaddr_in6 *)&server)->sin6_port :
791 ((struct sockaddr_in *)&server)->sin_port);
804 static void CAInitializePipe(int *fds)
809 ret = fcntl(fds[0], F_GETFD);
812 ret = fcntl(fds[0], F_SETFD, ret|FD_CLOEXEC);
816 ret = fcntl(fds[1], F_GETFD);
820 ret = fcntl(fds[1], F_SETFD, ret|FD_CLOEXEC);
830 OIC_LOG_V(ERROR, TAG, "pipe failed: %s", strerror(errno));
835 #define NEWSOCKET(FAMILY, NAME) \
836 caglobals.tcp.NAME.fd = CACreateAcceptSocket(FAMILY, &caglobals.tcp.NAME); \
837 if (caglobals.tcp.NAME.fd == -1) \
839 caglobals.tcp.NAME.port = 0; \
840 caglobals.tcp.NAME.fd = CACreateAcceptSocket(FAMILY, &caglobals.tcp.NAME); \
842 CHECKFD(caglobals.tcp.NAME.fd);
844 CAResult_t CATCPStartServer(const ca_thread_pool_t threadPool)
846 if (caglobals.tcp.started)
851 if (!caglobals.tcp.ipv4tcpenabled)
853 caglobals.tcp.ipv4tcpenabled = true; // only needed to run CA tests
855 if (!caglobals.tcp.ipv6tcpenabled)
857 caglobals.tcp.ipv6tcpenabled = true; // only needed to run CA tests
860 CAResult_t res = CATCPCreateMutex();
861 if (CA_STATUS_OK == res)
863 res = CATCPCreateCond();
865 if (CA_STATUS_OK != res)
867 OIC_LOG(ERROR, TAG, "failed to create mutex/cond");
871 ca_mutex_lock(g_mutexObjectList);
872 if (!caglobals.tcp.svrlist)
874 caglobals.tcp.svrlist = u_arraylist_create();
876 ca_mutex_unlock(g_mutexObjectList);
878 if (caglobals.server)
880 NEWSOCKET(AF_INET, ipv4);
881 NEWSOCKET(AF_INET6, ipv6);
882 OIC_LOG_V(DEBUG, TAG, "IPv4 socket fd=%d, port=%d",
883 caglobals.tcp.ipv4.fd, caglobals.tcp.ipv4.port);
884 OIC_LOG_V(DEBUG, TAG, "IPv6 socket fd=%d, port=%d",
885 caglobals.tcp.ipv6.fd, caglobals.tcp.ipv6.port);
888 // create pipe for fast shutdown
889 CAInitializePipe(caglobals.tcp.shutdownFds);
890 CHECKFD(caglobals.tcp.shutdownFds[0]);
891 CHECKFD(caglobals.tcp.shutdownFds[1]);
893 // create pipe for connection event
894 CAInitializePipe(caglobals.tcp.connectionFds);
895 CHECKFD(caglobals.tcp.connectionFds[0]);
896 CHECKFD(caglobals.tcp.connectionFds[1]);
898 caglobals.tcp.terminate = false;
899 res = ca_thread_pool_add_task(threadPool, CAReceiveHandler, NULL);
900 if (CA_STATUS_OK != res)
902 OIC_LOG(ERROR, TAG, "thread_pool_add_task failed");
905 OIC_LOG(DEBUG, TAG, "CAReceiveHandler thread started successfully.");
907 caglobals.tcp.started = true;
911 void CATCPStopServer()
914 ca_mutex_lock(g_mutexObjectList);
916 // set terminate flag
917 caglobals.tcp.terminate = true;
919 if (caglobals.tcp.shutdownFds[1] != -1)
921 close(caglobals.tcp.shutdownFds[1]);
922 // receive thread will stop immediately
925 if (caglobals.tcp.connectionFds[1] != -1)
927 close(caglobals.tcp.connectionFds[1]);
930 if (caglobals.tcp.started)
932 ca_cond_wait(g_condObjectList, g_mutexObjectList);
934 caglobals.tcp.started = false;
937 ca_mutex_unlock(g_mutexObjectList);
939 if (-1 != caglobals.tcp.ipv4.fd)
941 close(caglobals.tcp.ipv4.fd);
942 caglobals.tcp.ipv4.fd = -1;
945 if (-1 != caglobals.tcp.ipv6.fd)
947 close(caglobals.tcp.ipv6.fd);
948 caglobals.tcp.ipv6.fd = -1;
951 CATCPDisconnectAll();
956 void CATCPSetPacketReceiveCallback(CATCPPacketReceivedCallback callback)
958 g_packetReceivedCallback = callback;
961 void CATCPSetConnectionChangedCallback(CATCPConnectionHandleCallback connHandler)
963 g_connectionCallback = connHandler;
966 size_t CACheckPayloadLengthFromHeader(const void *data, size_t dlen)
968 VERIFY_NON_NULL_RET(data, TAG, "data", -1);
970 coap_transport_t transport = coap_get_tcp_header_type_from_initbyte(
971 ((unsigned char *)data)[0] >> 4);
973 coap_pdu_t *pdu = coap_new_pdu2(transport, dlen);
976 OIC_LOG(ERROR, TAG, "outpdu is null");
980 int ret = coap_pdu_parse2((unsigned char *) data, dlen, pdu, transport);
983 OIC_LOG(ERROR, TAG, "pdu parse failed");
984 coap_delete_pdu(pdu);
988 size_t payloadLen = 0;
989 size_t headerSize = coap_get_tcp_header_length_for_transport(transport);
990 OIC_LOG_V(DEBUG, TAG, "headerSize : %zu, pdu length : %d",
991 headerSize, pdu->length);
992 if (pdu->length > headerSize)
994 payloadLen = (unsigned char *) pdu->hdr + pdu->length - pdu->data;
1002 static ssize_t sendData(const CAEndpoint_t *endpoint, const void *data,
1003 size_t dlen, const char *fam)
1005 // #1. get TCP Server object from list
1007 CATCPSessionInfo_t *svritem = CAGetTCPSessionInfoFromEndpoint(endpoint, &index);
1010 // if there is no connection info, connect to TCP Server
1011 svritem = CAConnectTCPSession(endpoint);
1014 OIC_LOG(ERROR, TAG, "Failed to create TCP server object");
1019 // #2. check connection state
1020 if (svritem->fd < 0)
1022 // if file descriptor value is wrong, remove TCP Server info from list
1023 OIC_LOG(ERROR, TAG, "Failed to connect to TCP server");
1027 // #3. send data to TCP Server
1028 ssize_t remainLen = dlen;
1031 ssize_t len = send(svritem->fd, data, remainLen, 0);
1034 if (EWOULDBLOCK != errno)
1036 OIC_LOG_V(ERROR, TAG, "unicast ipv4tcp sendTo failed: %s", strerror(errno));
1043 } while (remainLen > 0);
1048 OIC_LOG_V(INFO, TAG, "unicast %stcp sendTo is successful: %zu bytes", fam, dlen);
1052 ssize_t CATCPSendData(CAEndpoint_t *endpoint, const void *data, size_t datalen)
1054 VERIFY_NON_NULL_RET(endpoint, TAG, "endpoint is NULL", -1);
1055 VERIFY_NON_NULL_RET(data, TAG, "data is NULL", -1);
1057 if (caglobals.tcp.ipv6tcpenabled && (endpoint->flags & CA_IPV6))
1059 return sendData(endpoint, data, datalen, "ipv6");
1061 if (caglobals.tcp.ipv4tcpenabled && (endpoint->flags & CA_IPV4))
1063 return sendData(endpoint, data, datalen, "ipv4");
1068 CAResult_t CAGetTCPInterfaceInformation(CAEndpoint_t **info, uint32_t *size)
1070 VERIFY_NON_NULL(info, TAG, "info is NULL");
1071 VERIFY_NON_NULL(size, TAG, "size is NULL");
1073 return CA_NOT_SUPPORTED;
1076 CATCPSessionInfo_t *CAConnectTCPSession(const CAEndpoint_t *endpoint)
1078 VERIFY_NON_NULL_RET(endpoint, TAG, "endpoint is NULL", NULL);
1080 // #1. create TCP server object
1081 CATCPSessionInfo_t *svritem = (CATCPSessionInfo_t *) OICCalloc(1, sizeof (*svritem));
1084 OIC_LOG(ERROR, TAG, "Out of memory");
1087 memcpy(svritem->sep.endpoint.addr, endpoint->addr, sizeof(svritem->sep.endpoint.addr));
1088 svritem->sep.endpoint.adapter = endpoint->adapter;
1089 svritem->sep.endpoint.port = endpoint->port;
1090 svritem->sep.endpoint.flags = endpoint->flags;
1091 svritem->sep.endpoint.ifindex = endpoint->ifindex;
1092 svritem->state = CONNECTING;
1094 // #2. add TCP connection info to list
1095 ca_mutex_lock(g_mutexObjectList);
1096 if (caglobals.tcp.svrlist)
1098 bool res = u_arraylist_add(caglobals.tcp.svrlist, svritem);
1101 OIC_LOG(ERROR, TAG, "u_arraylist_add failed.");
1104 ca_mutex_unlock(g_mutexObjectList);
1108 ca_mutex_unlock(g_mutexObjectList);
1110 // #3. create the socket and connect to TCP server
1111 int family = (svritem->sep.endpoint.flags & CA_IPV6) ? AF_INET6 : AF_INET;
1112 if (CA_STATUS_OK != CATCPCreateSocket(family, svritem))
1117 // #4. pass the connection information to CA Common Layer.
1118 if (g_connectionCallback)
1120 g_connectionCallback(&(svritem->sep.endpoint), true);
1126 CAResult_t CADisconnectTCPSession(CATCPSessionInfo_t *svritem, size_t index)
1128 VERIFY_NON_NULL(svritem, TAG, "svritem is NULL");
1130 // close the socket and remove TCP connection info in list.
1131 if (svritem->fd >= 0)
1133 shutdown(svritem->fd, SHUT_RDWR);
1136 svritem->state = (CONNECTED == svritem->state) ? DISCONNECTED : svritem->state;
1138 // pass the connection information to CA Common Layer.
1139 if (g_connectionCallback && DISCONNECTED == svritem->state)
1141 g_connectionCallback(&(svritem->sep.endpoint), false);
1144 u_arraylist_remove(caglobals.tcp.svrlist, index);
1145 OICFree(svritem->data);
1146 svritem->data = NULL;
1150 return CA_STATUS_OK;
1153 void CATCPDisconnectAll()
1155 ca_mutex_lock(g_mutexObjectList);
1157 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
1158 CATCPSessionInfo_t *svritem = NULL;
1159 for (size_t i = 0; i < length; i++)
1161 svritem = (CATCPSessionInfo_t *) u_arraylist_get(caglobals.tcp.svrlist, i);
1162 if (svritem && svritem->fd >= 0)
1164 shutdown(svritem->fd, SHUT_RDWR);
1166 OICFree(svritem->data);
1167 svritem->data = NULL;
1168 svritem->state = (CONNECTED == svritem->state) ? DISCONNECTED : svritem->state;
1170 // pass the connection information to CA Common Layer.
1171 if (g_connectionCallback && DISCONNECTED == svritem->state)
1173 g_connectionCallback(&(svritem->sep.endpoint), false);
1177 u_arraylist_destroy(caglobals.tcp.svrlist);
1178 caglobals.tcp.svrlist = NULL;
1179 ca_mutex_unlock(g_mutexObjectList);
1182 CAcloseSslConnectionAll();
1187 CATCPSessionInfo_t *CAGetTCPSessionInfoFromEndpoint(const CAEndpoint_t *endpoint, size_t *index)
1189 VERIFY_NON_NULL_RET(endpoint, TAG, "endpoint is NULL", NULL);
1190 VERIFY_NON_NULL_RET(index, TAG, "index is NULL", NULL);
1192 // get connection info from list
1193 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
1194 for (size_t i = 0; i < length; i++)
1196 CATCPSessionInfo_t *svritem = (CATCPSessionInfo_t *) u_arraylist_get(
1197 caglobals.tcp.svrlist, i);
1203 if (!strncmp(svritem->sep.endpoint.addr, endpoint->addr,
1204 sizeof(svritem->sep.endpoint.addr))
1205 && (svritem->sep.endpoint.port == endpoint->port)
1206 && (svritem->sep.endpoint.flags & endpoint->flags))
1216 CATCPSessionInfo_t *CAGetSessionInfoFromFD(int fd, size_t *index)
1218 ca_mutex_lock(g_mutexObjectList);
1220 // check from the last item.
1221 CATCPSessionInfo_t *svritem = NULL;
1222 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
1223 for (size_t i = 0; i < length; i++)
1225 svritem = (CATCPSessionInfo_t *) u_arraylist_get(caglobals.tcp.svrlist, i);
1227 if (svritem && svritem->fd == fd)
1230 ca_mutex_unlock(g_mutexObjectList);
1235 ca_mutex_unlock(g_mutexObjectList);
1240 CAResult_t CASearchAndDeleteTCPSession(const CAEndpoint_t *endpoint)
1242 ca_mutex_lock(g_mutexObjectList);
1244 CAResult_t result = CA_STATUS_OK;
1246 CATCPSessionInfo_t *svritem = CAGetTCPSessionInfoFromEndpoint(endpoint, &index);
1249 result = CADisconnectTCPSession(svritem, index);
1250 if (CA_STATUS_OK != result)
1252 OIC_LOG_V(ERROR, TAG, "CADisconnectTCPSession failed, result[%d]", result);
1256 ca_mutex_unlock(g_mutexObjectList);
1260 size_t CAGetTotalLengthFromHeader(const unsigned char *recvBuffer)
1262 OIC_LOG(DEBUG, TAG, "IN - CAGetTotalLengthFromHeader");
1264 coap_transport_t transport = coap_get_tcp_header_type_from_initbyte(
1265 ((unsigned char *)recvBuffer)[0] >> 4);
1266 size_t optPaylaodLen = coap_get_length_from_header((unsigned char *)recvBuffer,
1268 size_t headerLen = coap_get_tcp_header_length((unsigned char *)recvBuffer);
1270 OIC_LOG_V(DEBUG, TAG, "option/paylaod length [%zu]", optPaylaodLen);
1271 OIC_LOG_V(DEBUG, TAG, "header length [%zu]", headerLen);
1272 OIC_LOG_V(DEBUG, TAG, "total data length [%zu]", headerLen + optPaylaodLen);
1274 OIC_LOG(DEBUG, TAG, "OUT - CAGetTotalLengthFromHeader");
1275 return headerLen + optPaylaodLen;
1278 void CATCPSetErrorHandler(CATCPErrorHandleCallback errorHandleCallback)
1280 g_tcpErrorHandler = errorHandleCallback;