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 CASocketFd_t 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 *svritem);
104 #define CHECKFD(FD) \
105 if (FD > caglobals.tcp.maxfd) \
106 caglobals.tcp.maxfd = FD;
108 #define CLOSE_SOCKET(TYPE) \
109 if (caglobals.tcp.TYPE.fd != OC_INVALID_SOCKET) \
111 close(caglobals.tcp.TYPE.fd); \
112 caglobals.tcp.TYPE.fd = OC_INVALID_SOCKET; \
115 #define CA_FD_SET(TYPE, FDS) \
116 if (caglobals.tcp.TYPE.fd != OC_INVALID_SOCKET) \
118 FD_SET(caglobals.tcp.TYPE.fd, FDS); \
122 * Read length amount of data from socket item->fd
123 * Can read less data length then requested
124 * Actual read length added to item->len variable
126 * @param[in/out] item - used socket, buffer and to update received message length
127 * @param[in] length - length of data required to read
128 * @param[in] flags - additional info about socket
129 * @return - CA_STATUS_OK or appropriate error code
131 static CAResult_t CARecv(CATCPSessionInfo_t *item, size_t length, int flags)
135 return CA_STATUS_INVALID_PARAM;
138 //skip read operation if requested zero length
144 unsigned char *buffer = item->data + item->len;
146 int len = recv(item->fd, buffer, length, flags);
150 OIC_LOG_V(ERROR, TAG, "recv failed %s", strerror(errno));
151 return CA_RECEIVE_FAILED;
155 OIC_LOG(INFO, TAG, "Received disconnect from peer. Close connection");
156 item->state = DISCONNECTED;
157 return CA_DESTINATION_DISCONNECTED;
160 OIC_LOG_V(DEBUG, TAG, "recv len = %d", len);
161 OIC_LOG_BUFFER(DEBUG, TAG, buffer, len);
168 static void CATCPDestroyMutex()
170 if (g_mutexObjectList)
172 ca_mutex_free(g_mutexObjectList);
173 g_mutexObjectList = NULL;
177 static CAResult_t CATCPCreateMutex()
179 if (!g_mutexObjectList)
181 g_mutexObjectList = ca_mutex_new();
182 if (!g_mutexObjectList)
184 OIC_LOG(ERROR, TAG, "Failed to created mutex!");
185 return CA_STATUS_FAILED;
192 static void CATCPDestroyCond()
194 if (g_condObjectList)
196 ca_cond_free(g_condObjectList);
197 g_condObjectList = NULL;
201 static CAResult_t CATCPCreateCond()
203 if (!g_condObjectList)
205 g_condObjectList = ca_cond_new();
206 if (!g_condObjectList)
208 OIC_LOG(ERROR, TAG, "Failed to created cond!");
209 return CA_STATUS_FAILED;
215 static void CAReceiveHandler(void *data)
218 OIC_LOG(DEBUG, TAG, "IN - CAReceiveHandler");
220 while (!caglobals.tcp.terminate)
222 CAFindReadyMessage();
225 ca_mutex_lock(g_mutexObjectList);
226 ca_cond_signal(g_condObjectList);
227 ca_mutex_unlock(g_mutexObjectList);
229 OIC_LOG(DEBUG, TAG, "OUT - CAReceiveHandler");
232 static void CAFindReadyMessage()
235 struct timeval timeout = { .tv_sec = caglobals.tcp.selectTimeout };
238 CA_FD_SET(ipv4, &readFds);
239 CA_FD_SET(ipv6, &readFds);
241 if (OC_INVALID_SOCKET != caglobals.tcp.shutdownFds[0])
243 FD_SET(caglobals.tcp.shutdownFds[0], &readFds);
245 if (OC_INVALID_SOCKET != caglobals.tcp.connectionFds[0])
247 FD_SET(caglobals.tcp.connectionFds[0], &readFds);
250 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
251 for (size_t i = 0; i < length; i++)
253 CATCPSessionInfo_t *svritem =
254 (CATCPSessionInfo_t *) u_arraylist_get(caglobals.tcp.svrlist, i);
255 if (svritem && 0 <= svritem->fd && CONNECTED == svritem->state)
257 FD_SET(svritem->fd, &readFds);
261 int ret = select(caglobals.tcp.maxfd + 1, &readFds, NULL, NULL, &timeout);
263 if (caglobals.tcp.terminate)
265 OIC_LOG_V(DEBUG, TAG, "Packet receiver Stop request received.");
271 CASelectReturned(&readFds);
275 OIC_LOG_V(FATAL, TAG, "select error %s", strerror(errno));
279 static void CASelectReturned(fd_set *readFds)
281 VERIFY_NON_NULL_VOID(readFds, TAG, "readFds is NULL");
283 if (caglobals.tcp.ipv4.fd != -1 && FD_ISSET(caglobals.tcp.ipv4.fd, readFds))
285 CAAcceptConnection(CA_IPV4, &caglobals.tcp.ipv4);
288 else if (caglobals.tcp.ipv6.fd != -1 && FD_ISSET(caglobals.tcp.ipv6.fd, readFds))
290 CAAcceptConnection(CA_IPV6, &caglobals.tcp.ipv6);
293 else if (-1 != caglobals.tcp.connectionFds[0] &&
294 FD_ISSET(caglobals.tcp.connectionFds[0], readFds))
296 // new connection was created from remote device.
297 // exit the function to update read file descriptor.
298 char buf[MAX_ADDR_STR_SIZE_CA] = {0};
299 ssize_t len = read(caglobals.tcp.connectionFds[0], buf, sizeof (buf));
304 OIC_LOG_V(DEBUG, TAG, "Received new connection event with [%s]", buf);
305 FD_CLR(caglobals.tcp.connectionFds[0], readFds);
310 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
311 for (size_t i = 0; i < length; i++)
313 CATCPSessionInfo_t *svritem =
314 (CATCPSessionInfo_t *) u_arraylist_get(caglobals.tcp.svrlist, i);
315 if (svritem && svritem->fd >= 0)
317 if (FD_ISSET(svritem->fd, readFds))
319 CAReceiveMessage(svritem->fd);
320 if (-1 != svritem->fd)
322 FD_CLR(svritem->fd, readFds);
330 static void CAAcceptConnection(CATransportFlags_t flag, CASocket_t *sock)
332 VERIFY_NON_NULL_VOID(sock, TAG, "sock is NULL");
334 struct sockaddr_storage clientaddr;
335 socklen_t clientlen = sizeof (struct sockaddr_in);
338 clientlen = sizeof(struct sockaddr_in6);
341 CASocketFd_t sockfd = accept(sock->fd, (struct sockaddr *)&clientaddr, &clientlen);
342 if (OC_INVALID_SOCKET != sockfd)
344 CATCPSessionInfo_t *svritem =
345 (CATCPSessionInfo_t *) OICCalloc(1, sizeof (*svritem));
348 OIC_LOG(ERROR, TAG, "Out of memory");
353 svritem->fd = sockfd;
354 svritem->sep.endpoint.flags = flag;
355 svritem->sep.endpoint.adapter = CA_ADAPTER_TCP;
356 svritem->state = CONNECTED;
357 CAConvertAddrToName((struct sockaddr_storage *)&clientaddr, clientlen,
358 svritem->sep.endpoint.addr, &svritem->sep.endpoint.port);
360 ca_mutex_lock(g_mutexObjectList);
361 bool result = u_arraylist_add(caglobals.tcp.svrlist, svritem);
364 OIC_LOG(ERROR, TAG, "u_arraylist_add failed.");
367 ca_mutex_unlock(g_mutexObjectList);
370 ca_mutex_unlock(g_mutexObjectList);
377 static bool CAIsTlsMessage(const unsigned char* data, size_t length)
379 if (NULL == data || 0 == length)
381 OIC_LOG_V(ERROR, TAG, "%s: null input param", __func__);
385 unsigned char first_byte = data[0];
387 //TLS Plaintext has four types: change_cipher_spec = [14], alert = [15],
388 //handshake = [16], application_data = [17] in HEX
389 const uint8_t tls_head_type[] = {0x14, 0x15, 0x16, 0x17};
392 for (i = 0; i < sizeof(tls_head_type); i++)
394 if(tls_head_type[i] == first_byte)
405 * Clean socket state data
407 * @param[in/out] item - socket state data
409 static void CACleanData(CATCPSessionInfo_t *svritem)
413 OICFree(svritem->data);
414 svritem->data = NULL;
416 svritem->totalLen = 0;
417 svritem->protocol = UNKNOWN;
422 * Read message header from socket item->fd
424 * @param[in/out] item - used socket, buffer, current received message length and protocol
425 * @return - CA_STATUS_OK or appropriate error code
427 static CAResult_t CAReadHeader(CATCPSessionInfo_t *svritem)
429 CAResult_t res = CA_STATUS_OK;
433 return CA_STATUS_INVALID_PARAM;
436 if (NULL == svritem->data)
438 // allocate memory for message header (CoAP header size because it is bigger)
439 svritem->data = (unsigned char *) OICCalloc(1, COAP_MAX_HEADER_SIZE);
440 if (NULL == svritem->data)
442 OIC_LOG(ERROR, TAG, "OICCalloc - out of memory");
443 return CA_MEMORY_ALLOC_FAILED;
447 //read data (assume TLS header) from remote device.
448 //use TLS_HEADER_SIZE - svritem->len because even header can be read partially
449 res = CARecv(svritem, TLS_HEADER_SIZE - svritem->len, 0);
451 //return if any error occurs
452 if (CA_STATUS_OK != res)
457 //if not enough data received - read them on next CAReceiveMessage() call
458 if (svritem->len < TLS_HEADER_SIZE)
460 OIC_LOG(DEBUG, TAG, "Header received partially. Wait for rest header data");
464 //if enough data received - parse header
466 if (CAIsTlsMessage(svritem->data, svritem->len))
468 svritem->protocol = TLS;
470 //[3][4] bytes in tls header are tls payload length
471 unsigned int message_length = (unsigned int)((svritem->data[3] << 8) | svritem->data[4]);
472 OIC_LOG_V(DEBUG, TAG, "%s: message_length = %d", __func__, message_length);
474 svritem->totalLen = message_length + TLS_HEADER_SIZE;
479 svritem->protocol = COAP;
481 //seems CoAP data received. read full coap header.
482 coap_transport_t transport = coap_get_tcp_header_type_from_initbyte(svritem->data[0] >> 4);
484 size_t headerLen = coap_get_tcp_header_length_for_transport(transport);
486 if (svritem->len < headerLen)
488 //read required bytes to have full CoAP header
489 //it should be 1 byte (COAP_MAX_HEADER_SIZE - TLS_HEADER_SIZE)
490 res = CARecv(svritem, headerLen - svritem->len, 0);
492 //return if any error occurs
493 if (CA_STATUS_OK != res)
498 //if not enough data received - read them on next CAReceiveMessage() call
499 if (svritem->len < headerLen)
501 OIC_LOG(DEBUG, TAG, "CoAP header received partially. Wait for rest header data");
506 //calculate CoAP message length
507 svritem->totalLen = CAGetTotalLengthFromHeader(svritem->data);
510 unsigned char *buffer = OICRealloc(svritem->data, svritem->totalLen);
513 OIC_LOG(ERROR, TAG, "OICRealloc - out of memory");
514 return CA_MEMORY_ALLOC_FAILED;
516 svritem->data = buffer;
522 * Read message payload from socket item->fd
525 * @param[in/out] item - used socket, buffer and to update received message length
526 * @return - CA_STATUS_OK or appropriate error code
528 static CAResult_t CAReadPayload(CATCPSessionInfo_t *svritem)
532 return CA_STATUS_INVALID_PARAM;
535 return CARecv(svritem, svritem->totalLen - svritem->len, 0);
539 * Pass received data to app layer depending on protocol
541 * @param[in/out] item - used buffer, received message length and protocol
543 static void CAExecuteRequest(CATCPSessionInfo_t *svritem)
550 switch(svritem->protocol)
554 if (g_packetReceivedCallback)
556 g_packetReceivedCallback(&svritem->sep, svritem->data, svritem->len);
563 int ret = CAdecryptSsl(&svritem->sep, (uint8_t *)svritem->data, svritem->len);
565 OIC_LOG_V(DEBUG, TAG, "%s: CAdecryptSsl returned %d", __func__, ret);
569 case UNKNOWN: /* pass through */
571 OIC_LOG(ERROR, TAG, "unknown application protocol. Ignore it");
576 static void CAReceiveMessage(int fd)
578 CAResult_t res = CA_STATUS_OK;
580 //get remote device information from file descriptor.
582 CATCPSessionInfo_t *svritem = CAGetSessionInfoFromFD(fd, &index);
585 OIC_LOG(ERROR, TAG, "there is no connection information in list");
589 //totalLen filled only when header fully read and parsed
590 if (0 == svritem->totalLen)
592 res = CAReadHeader(svritem);
596 res = CAReadPayload(svritem);
598 //when successfully read all required data - pass them to upper layer.
599 if (CA_STATUS_OK == res && svritem->len == svritem->totalLen)
601 CAExecuteRequest(svritem);
602 CACleanData(svritem);
606 //disconnect session and clean-up data if any error occurs
607 if (res != CA_STATUS_OK)
610 if (CA_STATUS_OK != CAcloseSslConnection(&svritem->sep.endpoint))
612 OIC_LOG(ERROR, TAG, "Failed to close TLS session");
615 CASearchAndDeleteTCPSession(&(svritem->sep.endpoint));
620 static ssize_t CAWakeUpForReadFdsUpdate(const char *host)
622 if (caglobals.tcp.connectionFds[1] != -1)
627 len = write(caglobals.tcp.connectionFds[1], host, strlen(host));
628 } while ((len == -1) && (errno == EINTR));
630 if ((len == -1) && (errno != EINTR) && (errno != EPIPE))
632 OIC_LOG_V(DEBUG, TAG, "write failed: %s", strerror(errno));
639 static CAResult_t CATCPConvertNameToAddr(int family, const char *host, uint16_t port,
640 struct sockaddr_storage *sockaddr)
642 struct addrinfo *addrs = NULL;
643 struct addrinfo hints = { .ai_family = family,
644 .ai_protocol = IPPROTO_TCP,
645 .ai_socktype = SOCK_STREAM,
646 .ai_flags = AI_NUMERICHOST };
648 int r = getaddrinfo(host, NULL, &hints, &addrs);
653 OIC_LOG_V(ERROR, TAG, "getaddrinfo failed: errno %s", strerror(errno));
657 OIC_LOG_V(ERROR, TAG, "getaddrinfo failed: %s", gai_strerror(r));
660 return CA_STATUS_FAILED;
662 // assumption: in this case, getaddrinfo will only return one addrinfo
663 // or first is the one we want.
664 if (addrs[0].ai_family == AF_INET6)
666 memcpy(sockaddr, addrs[0].ai_addr, sizeof (struct sockaddr_in6));
667 ((struct sockaddr_in6 *)sockaddr)->sin6_port = htons(port);
671 memcpy(sockaddr, addrs[0].ai_addr, sizeof (struct sockaddr_in));
672 ((struct sockaddr_in *)sockaddr)->sin_port = htons(port);
678 static CAResult_t CATCPCreateSocket(int family, CATCPSessionInfo_t *svritem)
680 VERIFY_NON_NULL(svritem, TAG, "svritem is NULL");
682 OIC_LOG_V(DEBUG, TAG, "try to connect with [%s:%u]",
683 svritem->sep.endpoint.addr, svritem->sep.endpoint.port);
685 // #1. create tcp socket.
686 int fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
689 OIC_LOG_V(ERROR, TAG, "create socket failed: %s", strerror(errno));
690 return CA_SOCKET_OPERATION_FAILED;
694 // #2. convert address from string to binary.
695 struct sockaddr_storage sa = { .ss_family = family };
696 CAResult_t res = CATCPConvertNameToAddr(family, svritem->sep.endpoint.addr,
697 svritem->sep.endpoint.port, &sa);
698 if (CA_STATUS_OK != res)
700 OIC_LOG(ERROR, TAG, "convert name to sockaddr failed");
701 return CA_SOCKET_OPERATION_FAILED;
704 // #3. set socket length.
705 socklen_t socklen = 0;
706 if (sa.ss_family == AF_INET6)
708 struct sockaddr_in6 *sock6 = (struct sockaddr_in6 *)&sa;
709 if (!sock6->sin6_scope_id)
711 sock6->sin6_scope_id = svritem->sep.endpoint.ifindex;
713 socklen = sizeof(struct sockaddr_in6);
717 socklen = sizeof(struct sockaddr_in);
720 // #4. connect to remote server device.
721 if (connect(fd, (struct sockaddr *)&sa, socklen) < 0)
723 OIC_LOG_V(ERROR, TAG, "failed to connect socket, %s", strerror(errno));
724 return CA_SOCKET_OPERATION_FAILED;
727 OIC_LOG(DEBUG, TAG, "connect socket success");
728 svritem->state = CONNECTED;
729 CHECKFD(svritem->fd);
730 ssize_t len = CAWakeUpForReadFdsUpdate(svritem->sep.endpoint.addr);
733 OIC_LOG(ERROR, TAG, "wakeup receive thread failed");
734 return CA_SOCKET_OPERATION_FAILED;
739 static CASocketFd_t CACreateAcceptSocket(int family, CASocket_t *sock)
741 VERIFY_NON_NULL_RET(sock, TAG, "sock", -1);
743 if (OC_INVALID_SOCKET != sock->fd)
745 OIC_LOG(DEBUG, TAG, "accept socket created already");
749 socklen_t socklen = 0;
750 struct sockaddr_storage server = { .ss_family = family };
752 int fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
753 if (OC_INVALID_SOCKET == fd)
755 OIC_LOG(ERROR, TAG, "Failed to create socket");
759 if (family == AF_INET6)
761 // the socket is restricted to sending and receiving IPv6 packets only.
763 if (-1 == setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof (on)))
765 OIC_LOG_V(ERROR, TAG, "IPV6_V6ONLY failed: %s", strerror(errno));
768 ((struct sockaddr_in6 *)&server)->sin6_port = htons(sock->port);
769 socklen = sizeof (struct sockaddr_in6);
773 ((struct sockaddr_in *)&server)->sin_port = htons(sock->port);
774 socklen = sizeof (struct sockaddr_in);
778 if (-1 == setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)))
780 OIC_LOG(ERROR, TAG, "setsockopt SO_REUSEADDR");
784 if (-1 == bind(fd, (struct sockaddr *)&server, socklen))
786 OIC_LOG_V(ERROR, TAG, "bind socket failed: %s", strerror(errno));
790 if (listen(fd, caglobals.tcp.listenBacklog) != 0)
792 OIC_LOG(ERROR, TAG, "listen() error");
796 if (!sock->port) // return the assigned port
798 if (-1 == getsockname(fd, (struct sockaddr *)&server, &socklen))
800 OIC_LOG_V(ERROR, TAG, "getsockname failed: %s", strerror(errno));
803 sock->port = ntohs(family == AF_INET6 ?
804 ((struct sockaddr_in6 *)&server)->sin6_port :
805 ((struct sockaddr_in *)&server)->sin_port);
815 return OC_INVALID_SOCKET;
818 static void CAInitializePipe(int *fds)
823 ret = fcntl(fds[0], F_GETFD);
826 ret = fcntl(fds[0], F_SETFD, ret|FD_CLOEXEC);
830 ret = fcntl(fds[1], F_GETFD);
834 ret = fcntl(fds[1], F_SETFD, ret|FD_CLOEXEC);
844 OIC_LOG_V(ERROR, TAG, "pipe failed: %s", strerror(errno));
849 #define NEWSOCKET(FAMILY, NAME) \
850 caglobals.tcp.NAME.fd = CACreateAcceptSocket(FAMILY, &caglobals.tcp.NAME); \
851 if (caglobals.tcp.NAME.fd == -1) \
853 caglobals.tcp.NAME.port = 0; \
854 caglobals.tcp.NAME.fd = CACreateAcceptSocket(FAMILY, &caglobals.tcp.NAME); \
856 CHECKFD(caglobals.tcp.NAME.fd);
858 CAResult_t CATCPStartServer(const ca_thread_pool_t threadPool)
860 if (caglobals.tcp.started)
862 OIC_LOG(DEBUG, TAG, "Adapter is started already");
866 if (!caglobals.tcp.ipv4tcpenabled)
868 caglobals.tcp.ipv4tcpenabled = true; // only needed to run CA tests
870 if (!caglobals.tcp.ipv6tcpenabled)
872 caglobals.tcp.ipv6tcpenabled = true; // only needed to run CA tests
875 CAResult_t res = CATCPCreateMutex();
876 if (CA_STATUS_OK == res)
878 res = CATCPCreateCond();
880 if (CA_STATUS_OK != res)
882 OIC_LOG(ERROR, TAG, "failed to create mutex/cond");
886 ca_mutex_lock(g_mutexObjectList);
887 if (!caglobals.tcp.svrlist)
889 caglobals.tcp.svrlist = u_arraylist_create();
891 ca_mutex_unlock(g_mutexObjectList);
893 if (caglobals.server)
895 NEWSOCKET(AF_INET, ipv4);
896 NEWSOCKET(AF_INET6, ipv6);
897 OIC_LOG_V(DEBUG, TAG, "IPv4 socket fd=%d, port=%d",
898 caglobals.tcp.ipv4.fd, caglobals.tcp.ipv4.port);
899 OIC_LOG_V(DEBUG, TAG, "IPv6 socket fd=%d, port=%d",
900 caglobals.tcp.ipv6.fd, caglobals.tcp.ipv6.port);
903 // create pipe for fast shutdown
904 CAInitializePipe(caglobals.tcp.shutdownFds);
905 CHECKFD(caglobals.tcp.shutdownFds[0]);
906 CHECKFD(caglobals.tcp.shutdownFds[1]);
908 // create pipe for connection event
909 CAInitializePipe(caglobals.tcp.connectionFds);
910 CHECKFD(caglobals.tcp.connectionFds[0]);
911 CHECKFD(caglobals.tcp.connectionFds[1]);
913 caglobals.tcp.terminate = false;
914 res = ca_thread_pool_add_task(threadPool, CAReceiveHandler, NULL);
915 if (CA_STATUS_OK != res)
917 OIC_LOG(ERROR, TAG, "thread_pool_add_task failed");
920 OIC_LOG(DEBUG, TAG, "CAReceiveHandler thread started successfully.");
922 caglobals.tcp.started = true;
926 void CATCPStopServer()
928 if (caglobals.tcp.terminate)
930 OIC_LOG(DEBUG, TAG, "Adapter is not enabled");
935 ca_mutex_lock(g_mutexObjectList);
937 // set terminate flag.
938 caglobals.tcp.terminate = true;
940 if (caglobals.tcp.shutdownFds[1] != -1)
942 close(caglobals.tcp.shutdownFds[1]);
943 caglobals.tcp.shutdownFds[1] = OC_INVALID_SOCKET;
944 // receive thread will stop immediately
946 if (caglobals.tcp.connectionFds[1] != -1)
948 close(caglobals.tcp.connectionFds[1]);
949 caglobals.tcp.connectionFds[1] = OC_INVALID_SOCKET;
952 // close accept socket.
956 if (caglobals.tcp.started)
958 ca_cond_wait(g_condObjectList, g_mutexObjectList);
960 caglobals.tcp.started = false;
963 ca_mutex_unlock(g_mutexObjectList);
965 CATCPDisconnectAll();
969 OIC_LOG(DEBUG, TAG, "Adapter terminated successfully");
972 void CATCPSetPacketReceiveCallback(CATCPPacketReceivedCallback callback)
974 g_packetReceivedCallback = callback;
977 void CATCPSetConnectionChangedCallback(CATCPConnectionHandleCallback connHandler)
979 g_connectionCallback = connHandler;
982 size_t CACheckPayloadLengthFromHeader(const void *data, size_t dlen)
984 VERIFY_NON_NULL_RET(data, TAG, "data", -1);
986 coap_transport_t transport = coap_get_tcp_header_type_from_initbyte(
987 ((unsigned char *)data)[0] >> 4);
989 coap_pdu_t *pdu = coap_new_pdu2(transport, dlen);
992 OIC_LOG(ERROR, TAG, "outpdu is null");
996 int ret = coap_pdu_parse2((unsigned char *) data, dlen, pdu, transport);
999 OIC_LOG(ERROR, TAG, "pdu parse failed");
1000 coap_delete_pdu(pdu);
1004 size_t payloadLen = 0;
1005 size_t headerSize = coap_get_tcp_header_length_for_transport(transport);
1006 OIC_LOG_V(DEBUG, TAG, "headerSize : %zu, pdu length : %d",
1007 headerSize, pdu->length);
1008 if (pdu->length > headerSize)
1010 payloadLen = (unsigned char *) pdu->hdr + pdu->length - pdu->data;
1018 static ssize_t sendData(const CAEndpoint_t *endpoint, const void *data,
1019 size_t dlen, const char *fam)
1021 OIC_LOG_V(INFO, TAG, "The length of data that needs to be sent is %zu bytes", dlen);
1023 // #1. find a session info from list.
1024 CASocketFd_t sockFd = CAGetSocketFDFromEndpoint(endpoint);
1025 if (OC_INVALID_SOCKET == sockFd)
1027 // if there is no connection info, connect to remote device.
1028 sockFd = CAConnectTCPSession(endpoint);
1029 if (OC_INVALID_SOCKET == sockFd)
1031 OIC_LOG(ERROR, TAG, "Failed to create tcp session object");
1036 // #2. send data to remote device.
1037 ssize_t remainLen = dlen;
1040 ssize_t len = send(sockFd, data, remainLen, 0);
1043 if (EWOULDBLOCK != errno)
1045 OIC_LOG_V(ERROR, TAG, "unicast ipv4tcp sendTo failed: %s", strerror(errno));
1052 } while (remainLen > 0);
1057 OIC_LOG_V(INFO, TAG, "unicast %stcp sendTo is successful: %zu bytes", fam, dlen);
1061 ssize_t CATCPSendData(CAEndpoint_t *endpoint, const void *data, size_t datalen)
1063 VERIFY_NON_NULL_RET(endpoint, TAG, "endpoint is NULL", -1);
1064 VERIFY_NON_NULL_RET(data, TAG, "data is NULL", -1);
1066 if (caglobals.tcp.ipv6tcpenabled && (endpoint->flags & CA_IPV6))
1068 return sendData(endpoint, data, datalen, "ipv6");
1070 if (caglobals.tcp.ipv4tcpenabled && (endpoint->flags & CA_IPV4))
1072 return sendData(endpoint, data, datalen, "ipv4");
1075 OIC_LOG(ERROR, TAG, "Not supported transport flags");
1079 CAResult_t CAGetTCPInterfaceInformation(CAEndpoint_t **info, uint32_t *size)
1081 VERIFY_NON_NULL(info, TAG, "info is NULL");
1082 VERIFY_NON_NULL(size, TAG, "size is NULL");
1084 return CA_NOT_SUPPORTED;
1087 CASocketFd_t CAConnectTCPSession(const CAEndpoint_t *endpoint)
1089 VERIFY_NON_NULL_RET(endpoint, TAG, "endpoint is NULL", OC_INVALID_SOCKET);
1091 // #1. create TCP server object
1092 CATCPSessionInfo_t *svritem = (CATCPSessionInfo_t *) OICCalloc(1, sizeof (*svritem));
1095 OIC_LOG(ERROR, TAG, "Out of memory");
1096 return OC_INVALID_SOCKET;
1098 memcpy(svritem->sep.endpoint.addr, endpoint->addr, sizeof(svritem->sep.endpoint.addr));
1099 svritem->sep.endpoint.adapter = endpoint->adapter;
1100 svritem->sep.endpoint.port = endpoint->port;
1101 svritem->sep.endpoint.flags = endpoint->flags;
1102 svritem->sep.endpoint.ifindex = endpoint->ifindex;
1103 svritem->state = CONNECTING;
1105 // #2. add TCP connection info to list
1106 ca_mutex_lock(g_mutexObjectList);
1107 if (caglobals.tcp.svrlist)
1109 bool res = u_arraylist_add(caglobals.tcp.svrlist, svritem);
1112 OIC_LOG(ERROR, TAG, "u_arraylist_add failed.");
1115 ca_mutex_unlock(g_mutexObjectList);
1116 return OC_INVALID_SOCKET;
1119 ca_mutex_unlock(g_mutexObjectList);
1121 // #3. create the socket and connect to TCP server
1122 int family = (svritem->sep.endpoint.flags & CA_IPV6) ? AF_INET6 : AF_INET;
1123 if (CA_STATUS_OK != CATCPCreateSocket(family, svritem))
1125 return OC_INVALID_SOCKET;
1128 // #4. pass the connection information to CA Common Layer.
1129 if (g_connectionCallback)
1131 g_connectionCallback(&(svritem->sep.endpoint), true);
1137 CAResult_t CADisconnectTCPSession(size_t index)
1139 CATCPSessionInfo_t *removedData = u_arraylist_remove(caglobals.tcp.svrlist, index);
1142 OIC_LOG(DEBUG, TAG, "there is no data to be removed");
1143 return CA_STATUS_OK;
1146 // close the socket and remove session info in list.
1147 if (removedData->fd >= 0)
1149 shutdown(removedData->fd, SHUT_RDWR);
1150 close(removedData->fd);
1151 removedData->fd = -1;
1152 removedData->state = (CONNECTED == removedData->state) ?
1153 DISCONNECTED : removedData->state;
1155 // pass the connection information to CA Common Layer.
1156 if (g_connectionCallback && DISCONNECTED == removedData->state)
1158 g_connectionCallback(&(removedData->sep.endpoint), false);
1161 OICFree(removedData->data);
1162 removedData->data = NULL;
1164 OICFree(removedData);
1167 OIC_LOG(DEBUG, TAG, "data is removed from session list");
1168 return CA_STATUS_OK;
1171 void CATCPDisconnectAll()
1173 ca_mutex_lock(g_mutexObjectList);
1175 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
1176 for (ssize_t index = length; index > 0; index--)
1178 // disconnect session from remote device.
1179 CADisconnectTCPSession(index - 1);
1182 u_arraylist_destroy(caglobals.tcp.svrlist);
1183 caglobals.tcp.svrlist = NULL;
1185 ca_mutex_unlock(g_mutexObjectList);
1188 CAcloseSslConnectionAll();
1193 CATCPSessionInfo_t *CAGetTCPSessionInfoFromEndpoint(const CAEndpoint_t *endpoint, size_t *index)
1195 VERIFY_NON_NULL_RET(endpoint, TAG, "endpoint is NULL", NULL);
1196 VERIFY_NON_NULL_RET(index, TAG, "index is NULL", NULL);
1198 OIC_LOG_V(DEBUG, TAG, "Looking for [%s:%d]", endpoint->addr, endpoint->port);
1200 // get connection info from list
1201 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
1202 for (size_t i = 0; i < length; i++)
1204 CATCPSessionInfo_t *svritem = (CATCPSessionInfo_t *) u_arraylist_get(
1205 caglobals.tcp.svrlist, i);
1211 if (!strncmp(svritem->sep.endpoint.addr, endpoint->addr,
1212 sizeof(svritem->sep.endpoint.addr))
1213 && (svritem->sep.endpoint.port == endpoint->port)
1214 && (svritem->sep.endpoint.flags & endpoint->flags))
1216 OIC_LOG(DEBUG, TAG, "Found in session list");
1222 OIC_LOG(DEBUG, TAG, "Session not found");
1226 CASocketFd_t CAGetSocketFDFromEndpoint(const CAEndpoint_t *endpoint)
1228 VERIFY_NON_NULL_RET(endpoint, TAG, "endpoint is NULL", OC_INVALID_SOCKET);
1230 OIC_LOG_V(DEBUG, TAG, "Looking for [%s:%d]", endpoint->addr, endpoint->port);
1232 // get connection info from list.
1233 ca_mutex_lock(g_mutexObjectList);
1234 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
1235 for (size_t i = 0; i < length; i++)
1237 CATCPSessionInfo_t *svritem = (CATCPSessionInfo_t *) u_arraylist_get(
1238 caglobals.tcp.svrlist, i);
1244 if (!strncmp(svritem->sep.endpoint.addr, endpoint->addr,
1245 sizeof(svritem->sep.endpoint.addr))
1246 && (svritem->sep.endpoint.port == endpoint->port)
1247 && (svritem->sep.endpoint.flags & endpoint->flags))
1249 ca_mutex_unlock(g_mutexObjectList);
1250 OIC_LOG(DEBUG, TAG, "Found in session list");
1255 ca_mutex_unlock(g_mutexObjectList);
1256 OIC_LOG(DEBUG, TAG, "Session not found");
1257 return OC_INVALID_SOCKET;
1260 CATCPSessionInfo_t *CAGetSessionInfoFromFD(int fd, size_t *index)
1262 ca_mutex_lock(g_mutexObjectList);
1264 // check from the last item.
1265 CATCPSessionInfo_t *svritem = NULL;
1266 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
1267 for (size_t i = 0; i < length; i++)
1269 svritem = (CATCPSessionInfo_t *) u_arraylist_get(caglobals.tcp.svrlist, i);
1271 if (svritem && svritem->fd == fd)
1274 ca_mutex_unlock(g_mutexObjectList);
1279 ca_mutex_unlock(g_mutexObjectList);
1284 CAResult_t CASearchAndDeleteTCPSession(const CAEndpoint_t *endpoint)
1286 ca_mutex_lock(g_mutexObjectList);
1288 CAResult_t result = CA_STATUS_OK;
1290 CATCPSessionInfo_t *svritem = CAGetTCPSessionInfoFromEndpoint(endpoint, &index);
1293 result = CADisconnectTCPSession(index);
1294 if (CA_STATUS_OK != result)
1296 OIC_LOG_V(ERROR, TAG, "CADisconnectTCPSession failed, result[%d]", result);
1300 ca_mutex_unlock(g_mutexObjectList);
1304 size_t CAGetTotalLengthFromHeader(const unsigned char *recvBuffer)
1306 OIC_LOG(DEBUG, TAG, "IN - CAGetTotalLengthFromHeader");
1308 coap_transport_t transport = coap_get_tcp_header_type_from_initbyte(
1309 ((unsigned char *)recvBuffer)[0] >> 4);
1310 size_t optPaylaodLen = coap_get_length_from_header((unsigned char *)recvBuffer,
1312 size_t headerLen = coap_get_tcp_header_length((unsigned char *)recvBuffer);
1314 OIC_LOG_V(DEBUG, TAG, "option/paylaod length [%zu]", optPaylaodLen);
1315 OIC_LOG_V(DEBUG, TAG, "header length [%zu]", headerLen);
1316 OIC_LOG_V(DEBUG, TAG, "total data length [%zu]", headerLen + optPaylaodLen);
1318 OIC_LOG(DEBUG, TAG, "OUT - CAGetTotalLengthFromHeader");
1319 return headerLen + optPaylaodLen;
1322 void CATCPSetErrorHandler(CATCPErrorHandleCallback errorHandleCallback)
1324 g_tcpErrorHandler = errorHandleCallback;