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"
42 #include "caadapterutils.h"
44 #include "oic_malloc.h"
47 #include "ca_adapter_net_tls.h"
51 * Logging tag for module name.
53 #define TAG "OIC_CA_TCP_SERVER"
56 * Maximum CoAP over TCP header length
57 * to know the total data length.
59 #define COAP_MAX_HEADER_SIZE 6
64 #define TLS_HEADER_SIZE 5
67 * Mutex to synchronize device object list.
69 static ca_mutex g_mutexObjectList = NULL;
72 * Conditional mutex to synchronize.
74 static ca_cond g_condObjectList = NULL;
77 * Maintains the callback to be notified when data received from remote device.
79 static CATCPPacketReceivedCallback g_packetReceivedCallback = NULL;
82 * Error callback to update error in TCP.
84 static CATCPErrorHandleCallback g_tcpErrorHandler = NULL;
87 * Connected Callback to pass the connection information to RI.
89 static CATCPConnectionHandleCallback g_connectionCallback = NULL;
91 static CAResult_t CATCPCreateMutex();
92 static void CATCPDestroyMutex();
93 static CAResult_t CATCPCreateCond();
94 static void CATCPDestroyCond();
95 static int CACreateAcceptSocket(int family, CASocket_t *sock);
96 static void CAAcceptConnection(CATransportFlags_t flag, CASocket_t *sock);
97 static void CAFindReadyMessage();
98 static void CASelectReturned(fd_set *readFds);
99 static void CAReceiveMessage(int fd);
100 static void CAReceiveHandler(void *data);
101 static int CATCPCreateSocket(int family, CATCPSessionInfo_t *tcpServerInfo);
103 #define CHECKFD(FD) \
104 if (FD > caglobals.tcp.maxfd) \
105 caglobals.tcp.maxfd = FD;
108 * Read length amount of data from socket item->fd
109 * Can read less data length then requested
110 * Actual read length added to item->len variable
112 * @param[in/out] item - used socket, buffer and to update received message length
113 * @param[in] length - length of data required to read
114 * @param[in] flags - additional info about socket
115 * @return - CA_STATUS_OK or appropriate error code
117 static CAResult_t CARecv(CATCPSessionInfo_t *item, size_t length, int flags)
121 return CA_STATUS_INVALID_PARAM;
124 //skip read operation if requested zero length
130 unsigned char *buffer = item->data + item->len;
132 int len = recv(item->fd, buffer, length, flags);
136 OIC_LOG_V(ERROR, TAG, "recv failed %s", strerror(errno));
137 return CA_RECEIVE_FAILED;
141 OIC_LOG(INFO, TAG, "Received disconnect from peer. Close connection");
142 return CA_DESTINATION_DISCONNECTED;
145 OIC_LOG_V(DEBUG, TAG, "recv len = %d", len);
146 OIC_LOG_BUFFER(DEBUG, TAG, buffer, len);
153 static void CATCPDestroyMutex()
155 if (g_mutexObjectList)
157 ca_mutex_free(g_mutexObjectList);
158 g_mutexObjectList = NULL;
162 static CAResult_t CATCPCreateMutex()
164 if (!g_mutexObjectList)
166 g_mutexObjectList = ca_mutex_new();
167 if (!g_mutexObjectList)
169 OIC_LOG(ERROR, TAG, "Failed to created mutex!");
170 return CA_STATUS_FAILED;
177 static void CATCPDestroyCond()
179 if (g_condObjectList)
181 ca_cond_free(g_condObjectList);
182 g_condObjectList = NULL;
186 static CAResult_t CATCPCreateCond()
188 if (!g_condObjectList)
190 g_condObjectList = ca_cond_new();
191 if (!g_condObjectList)
193 OIC_LOG(ERROR, TAG, "Failed to created cond!");
194 return CA_STATUS_FAILED;
200 static void CAReceiveHandler(void *data)
203 OIC_LOG(DEBUG, TAG, "IN - CAReceiveHandler");
205 while (!caglobals.tcp.terminate)
207 CAFindReadyMessage();
210 ca_mutex_lock(g_mutexObjectList);
211 ca_cond_signal(g_condObjectList);
212 ca_mutex_unlock(g_mutexObjectList);
214 OIC_LOG(DEBUG, TAG, "OUT - CAReceiveHandler");
217 static void CAFindReadyMessage()
220 struct timeval timeout = { .tv_sec = caglobals.tcp.selectTimeout };
224 if (-1 != caglobals.tcp.ipv4.fd)
226 FD_SET(caglobals.tcp.ipv4.fd, &readFds);
228 if (-1 != caglobals.tcp.ipv6.fd)
230 FD_SET(caglobals.tcp.ipv6.fd, &readFds);
232 if (-1 != caglobals.tcp.shutdownFds[0])
234 FD_SET(caglobals.tcp.shutdownFds[0], &readFds);
236 if (-1 != caglobals.tcp.connectionFds[0])
238 FD_SET(caglobals.tcp.connectionFds[0], &readFds);
241 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
242 for (size_t i = 0; i < length; i++)
244 CATCPSessionInfo_t *svritem =
245 (CATCPSessionInfo_t *) u_arraylist_get(caglobals.tcp.svrlist, i);
246 if (svritem && 0 <= svritem->fd)
248 FD_SET(svritem->fd, &readFds);
252 int ret = select(caglobals.tcp.maxfd + 1, &readFds, NULL, NULL, &timeout);
254 if (caglobals.tcp.terminate)
256 OIC_LOG_V(DEBUG, TAG, "Packet receiver Stop request received.");
263 OIC_LOG_V(FATAL, TAG, "select error %s", strerror(errno));
268 CASelectReturned(&readFds);
271 static void CASelectReturned(fd_set *readFds)
273 VERIFY_NON_NULL_VOID(readFds, TAG, "readFds is NULL");
275 if (caglobals.tcp.ipv4.fd != -1 && FD_ISSET(caglobals.tcp.ipv4.fd, readFds))
277 CAAcceptConnection(CA_IPV4, &caglobals.tcp.ipv4);
280 else if (caglobals.tcp.ipv6.fd != -1 && FD_ISSET(caglobals.tcp.ipv6.fd, readFds))
282 CAAcceptConnection(CA_IPV6, &caglobals.tcp.ipv6);
285 else if (-1 != caglobals.tcp.connectionFds[0] &&
286 FD_ISSET(caglobals.tcp.connectionFds[0], readFds))
288 // new connection was created from remote device.
289 // exit the function to update read file descriptor.
290 char buf[MAX_ADDR_STR_SIZE_CA] = {0};
291 ssize_t len = read(caglobals.tcp.connectionFds[0], buf, sizeof (buf));
296 OIC_LOG_V(DEBUG, TAG, "Received new connection event with [%s]", buf);
297 FD_CLR(caglobals.tcp.connectionFds[0], readFds);
302 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
303 for (size_t i = 0; i < length; i++)
305 CATCPSessionInfo_t *svritem =
306 (CATCPSessionInfo_t *) u_arraylist_get(caglobals.tcp.svrlist, i);
307 if (svritem && svritem->fd >= 0)
309 if (FD_ISSET(svritem->fd, readFds))
311 CAReceiveMessage(svritem->fd);
312 FD_CLR(svritem->fd, readFds);
319 static void CAAcceptConnection(CATransportFlags_t flag, CASocket_t *sock)
321 VERIFY_NON_NULL_VOID(sock, TAG, "sock is NULL");
323 struct sockaddr_storage clientaddr;
324 socklen_t clientlen = sizeof (struct sockaddr_in);
327 clientlen = sizeof(struct sockaddr_in6);
330 int sockfd = accept(sock->fd, (struct sockaddr *)&clientaddr, &clientlen);
333 CATCPSessionInfo_t *svritem =
334 (CATCPSessionInfo_t *) OICCalloc(1, sizeof (*svritem));
337 OIC_LOG(ERROR, TAG, "Out of memory");
342 svritem->fd = sockfd;
343 svritem->sep.endpoint.flags = flag;
344 CAConvertAddrToName((struct sockaddr_storage *)&clientaddr, clientlen,
345 svritem->sep.endpoint.addr, &svritem->sep.endpoint.port);
347 ca_mutex_lock(g_mutexObjectList);
348 bool result = u_arraylist_add(caglobals.tcp.svrlist, svritem);
351 OIC_LOG(ERROR, TAG, "u_arraylist_add failed.");
354 ca_mutex_unlock(g_mutexObjectList);
357 ca_mutex_unlock(g_mutexObjectList);
364 static bool CAIsTlsMessage(const CATCPSessionInfo_t * recvinfo)
366 if (recvinfo->data == NULL || recvinfo->len == 0)
368 OIC_LOG_V(ERROR, TAG, "%s: null input param", __func__);
372 unsigned char first_byte = recvinfo->data[0];
374 //TLS Plaintext has four types: change_cipher_spec = [14], alert = [15],
375 //handshake = [16], application_data = [17] in HEX
376 const uint8_t tls_head_type[] = {0x14, 0x15, 0x16, 0x17};
379 for (i = 0; i < sizeof(tls_head_type); i++)
381 if(tls_head_type[i] == first_byte)
392 * Clean socket state data
394 * @param[in/out] item - socket state data
396 static void CACleanData(CATCPSessionInfo_t *svritem)
400 OICFree(svritem->data);
401 svritem->data = NULL;
403 svritem->totalLen = 0;
404 svritem->protocol = UNKNOWN;
409 * Read message header from socket item->fd
411 * @param[in/out] item - used socket, buffer, current received message length and protocol
412 * @return - CA_STATUS_OK or appropriate error code
414 static CAResult_t CAReadHeader(CATCPSessionInfo_t *svritem)
416 CAResult_t res = CA_STATUS_OK;
420 return CA_STATUS_INVALID_PARAM;
423 if (NULL == svritem->data)
425 // allocate memory for message header (CoAP header size because it is bigger)
426 svritem->data = (unsigned char *) OICCalloc(1, COAP_MAX_HEADER_SIZE);
427 if (NULL == svritem->data)
429 OIC_LOG(ERROR, TAG, "OICCalloc - out of memory");
430 return CA_MEMORY_ALLOC_FAILED;
434 //read data (assume TLS header) from remote device.
435 //use TLS_HEADER_SIZE - svritem->len because even header can be read partially
436 res = CARecv(svritem, TLS_HEADER_SIZE - svritem->len, 0);
438 //return if any error occurs
439 if (CA_STATUS_OK != res)
444 //if not enough data received - read them on next CAReceiveMessage() call
445 if (svritem->len < TLS_HEADER_SIZE)
447 OIC_LOG(DEBUG, TAG, "Header received partially. Wait for rest header data");
451 //if enough data received - parse header
453 if (CAIsTlsMessage(svritem))
455 svritem->protocol = TLS;
457 //[3][4] bytes in tls header are tls payload length
458 unsigned int message_length = (unsigned int)((svritem->data[3] << 8) | svritem->data[4]);
459 OIC_LOG_V(DEBUG, TAG, "%s: message_length = %d", __func__, message_length);
461 svritem->totalLen = message_length + TLS_HEADER_SIZE;
466 svritem->protocol = COAP;
468 //seems CoAP data received. read full coap header.
469 coap_transport_type transport = coap_get_tcp_header_type_from_initbyte(svritem->data[0] >> 4);
471 size_t headerLen = coap_get_tcp_header_length_for_transport(transport);
473 if (svritem->len < headerLen)
475 //read required bytes to have full CoAP header
476 //it should be 1 byte (COAP_MAX_HEADER_SIZE - TLS_HEADER_SIZE)
477 res = CARecv(svritem, headerLen - svritem->len, 0);
479 //return if any error occurs
480 if (CA_STATUS_OK != res)
485 //if not enough data received - read them on next CAReceiveMessage() call
486 if (svritem->len < headerLen)
488 OIC_LOG(DEBUG, TAG, "CoAP header received partially. Wait for rest header data");
493 //calculate CoAP message length
494 svritem->totalLen = CAGetTotalLengthFromHeader(svritem->data);
497 unsigned char *buffer = OICRealloc(svritem->data, svritem->totalLen);
500 OIC_LOG(ERROR, TAG, "OICRealloc - out of memory");
501 return CA_MEMORY_ALLOC_FAILED;
503 svritem->data = buffer;
509 * Read message payload from socket item->fd
512 * @param[in/out] item - used socket, buffer and to update received message length
513 * @return - CA_STATUS_OK or appropriate error code
515 static CAResult_t CAReadPayload(CATCPSessionInfo_t *svritem)
519 return CA_STATUS_INVALID_PARAM;
522 return CARecv(svritem, svritem->totalLen - svritem->len, 0);
526 * Pass received data to app layer depending on protocol
528 * @param[in/out] item - used buffer, received message length and protocol
530 static void CAExecuteRequest(CATCPSessionInfo_t *svritem)
537 switch(svritem->protocol)
541 if (g_packetReceivedCallback)
543 g_packetReceivedCallback(&svritem->sep, svritem->data, svritem->len);
550 int ret = CAdecryptTls(&svritem->sep, (uint8_t *)svritem->data, svritem->len);
552 OIC_LOG_V(DEBUG, TAG, "%s: CAdecryptTls returned %d", __func__, ret);
556 case UNKNOWN: /* pass through */
558 OIC_LOG(ERROR, TAG, "unknown application protocol. Ignore it");
563 static void CAReceiveMessage(int fd)
565 CAResult_t res = CA_STATUS_OK;
567 //get remote device information from file descriptor.
569 CATCPSessionInfo_t *svritem = CAGetSessionInfoFromFD(fd, &index);
572 OIC_LOG(ERROR, TAG, "there is no connection information in list");
576 //totalLen filled only when header fully read and parsed
577 if (0 == svritem->totalLen)
579 res = CAReadHeader(svritem);
583 res = CAReadPayload(svritem);
585 //when successfully read all required data - pass them to upper layer.
586 if (CA_STATUS_OK == res && svritem->len == svritem->totalLen)
588 CAExecuteRequest(svritem);
589 CACleanData(svritem);
593 //disconnect session and clean-up data if any error occurs
594 if (res != CA_STATUS_OK)
596 CADisconnectTCPSession(svritem, index);
597 CACleanData(svritem);
601 static void CAWakeUpForReadFdsUpdate(const char *host)
603 if (caglobals.tcp.connectionFds[1] != -1)
608 len = write(caglobals.tcp.connectionFds[1], host, strlen(host));
609 } while ((len == -1) && (errno == EINTR));
611 if ((len == -1) && (errno != EINTR) && (errno != EPIPE))
613 OIC_LOG_V(DEBUG, TAG, "write failed: %s", strerror(errno));
618 static CAResult_t CATCPConvertNameToAddr(int family, const char *host, uint16_t port,
619 struct sockaddr_storage *sockaddr)
621 struct addrinfo *addrs = NULL;
622 struct addrinfo hints = { .ai_family = family,
623 .ai_protocol = IPPROTO_TCP,
624 .ai_socktype = SOCK_STREAM,
625 .ai_flags = AI_NUMERICHOST };
627 int r = getaddrinfo(host, NULL, &hints, &addrs);
632 OIC_LOG_V(ERROR, TAG, "getaddrinfo failed: errno %s", strerror(errno));
636 OIC_LOG_V(ERROR, TAG, "getaddrinfo failed: %s", gai_strerror(r));
639 return CA_STATUS_FAILED;
641 // assumption: in this case, getaddrinfo will only return one addrinfo
642 // or first is the one we want.
643 if (addrs[0].ai_family == AF_INET6)
645 memcpy(sockaddr, addrs[0].ai_addr, sizeof (struct sockaddr_in6));
646 ((struct sockaddr_in6 *)sockaddr)->sin6_port = htons(port);
650 memcpy(sockaddr, addrs[0].ai_addr, sizeof (struct sockaddr_in));
651 ((struct sockaddr_in *)sockaddr)->sin_port = htons(port);
657 static int CATCPCreateSocket(int family, CATCPSessionInfo_t *svritem)
659 // #1. create tcp socket.
660 int fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
663 OIC_LOG_V(ERROR, TAG, "create socket failed: %s", strerror(errno));
667 // #2. convert address from string to binary.
668 struct sockaddr_storage sa = { .ss_family = family };
669 CAResult_t res = CATCPConvertNameToAddr(family, svritem->sep.endpoint.addr,
670 svritem->sep.endpoint.port, &sa);
671 if (CA_STATUS_OK != res)
677 // #3. set socket length.
678 socklen_t socklen = 0;
679 if (sa.ss_family == AF_INET6)
681 struct sockaddr_in6 *sock6 = (struct sockaddr_in6 *)&sa;
682 if (!sock6->sin6_scope_id)
684 sock6->sin6_scope_id = svritem->sep.endpoint.ifindex;
686 socklen = sizeof(struct sockaddr_in6);
690 socklen = sizeof(struct sockaddr_in);
693 // #4. connect to remote server device.
694 if (connect(fd, (struct sockaddr *)&sa, socklen) < 0)
696 OIC_LOG_V(ERROR, TAG, "failed to connect socket, %s", strerror(errno));
701 OIC_LOG(DEBUG, TAG, "connect socket success");
702 CAWakeUpForReadFdsUpdate(svritem->sep.endpoint.addr);
706 static int CACreateAcceptSocket(int family, CASocket_t *sock)
708 VERIFY_NON_NULL_RET(sock, TAG, "sock", -1);
712 OIC_LOG(DEBUG, TAG, "accept socket created already");
716 socklen_t socklen = 0;
717 struct sockaddr_storage server = { .ss_family = family };
719 int fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
722 OIC_LOG(ERROR, TAG, "Failed to create socket");
726 if (family == AF_INET6)
728 // the socket is re‐stricted to sending and receiving IPv6 packets only.
730 if (-1 == setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof (on)))
732 OIC_LOG_V(ERROR, TAG, "IPV6_V6ONLY failed: %s", strerror(errno));
735 ((struct sockaddr_in6 *)&server)->sin6_port = htons(sock->port);
736 socklen = sizeof (struct sockaddr_in6);
740 ((struct sockaddr_in *)&server)->sin_port = htons(sock->port);
741 socklen = sizeof (struct sockaddr_in);
745 if (-1 == setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)))
747 OIC_LOG(ERROR, TAG, "setsockopt SO_REUSEADDR");
751 if (-1 == bind(fd, (struct sockaddr *)&server, socklen))
753 OIC_LOG_V(ERROR, TAG, "bind socket failed: %s", strerror(errno));
757 if (listen(fd, caglobals.tcp.listenBacklog) != 0)
759 OIC_LOG(ERROR, TAG, "listen() error");
763 if (!sock->port) // return the assigned port
765 if (-1 == getsockname(fd, (struct sockaddr *)&server, &socklen))
767 OIC_LOG_V(ERROR, TAG, "getsockname failed: %s", strerror(errno));
770 sock->port = ntohs(family == AF_INET6 ?
771 ((struct sockaddr_in6 *)&server)->sin6_port :
772 ((struct sockaddr_in *)&server)->sin_port);
785 static void CAInitializePipe(int *fds)
790 ret = fcntl(fds[0], F_GETFD);
793 ret = fcntl(fds[0], F_SETFD, ret|FD_CLOEXEC);
797 ret = fcntl(fds[1], F_GETFD);
801 ret = fcntl(fds[1], F_SETFD, ret|FD_CLOEXEC);
811 OIC_LOG_V(ERROR, TAG, "pipe failed: %s", strerror(errno));
816 #define NEWSOCKET(FAMILY, NAME) \
817 caglobals.tcp.NAME.fd = CACreateAcceptSocket(FAMILY, &caglobals.tcp.NAME); \
818 if (caglobals.tcp.NAME.fd == -1) \
820 caglobals.tcp.NAME.port = 0; \
821 caglobals.tcp.NAME.fd = CACreateAcceptSocket(FAMILY, &caglobals.tcp.NAME); \
823 CHECKFD(caglobals.tcp.NAME.fd);
825 CAResult_t CATCPStartServer(const ca_thread_pool_t threadPool)
827 if (caglobals.tcp.started)
832 if (!caglobals.tcp.ipv4tcpenabled)
834 caglobals.tcp.ipv4tcpenabled = true; // only needed to run CA tests
836 if (!caglobals.tcp.ipv6tcpenabled)
838 caglobals.tcp.ipv6tcpenabled = true; // only needed to run CA tests
841 CAResult_t res = CATCPCreateMutex();
842 if (CA_STATUS_OK == res)
844 res = CATCPCreateCond();
846 if (CA_STATUS_OK != res)
848 OIC_LOG(ERROR, TAG, "failed to create mutex/cond");
852 ca_mutex_lock(g_mutexObjectList);
853 if (!caglobals.tcp.svrlist)
855 caglobals.tcp.svrlist = u_arraylist_create();
857 ca_mutex_unlock(g_mutexObjectList);
859 if (caglobals.server)
861 NEWSOCKET(AF_INET, ipv4);
862 NEWSOCKET(AF_INET6, ipv6);
863 OIC_LOG_V(DEBUG, TAG, "IPv4 socket fd=%d, port=%d",
864 caglobals.tcp.ipv4.fd, caglobals.tcp.ipv4.port);
865 OIC_LOG_V(DEBUG, TAG, "IPv6 socket fd=%d, port=%d",
866 caglobals.tcp.ipv6.fd, caglobals.tcp.ipv6.port);
869 // create pipe for fast shutdown
870 CAInitializePipe(caglobals.tcp.shutdownFds);
871 CHECKFD(caglobals.tcp.shutdownFds[0]);
872 CHECKFD(caglobals.tcp.shutdownFds[1]);
874 // create pipe for connection event
875 CAInitializePipe(caglobals.tcp.connectionFds);
876 CHECKFD(caglobals.tcp.connectionFds[0]);
877 CHECKFD(caglobals.tcp.connectionFds[1]);
879 caglobals.tcp.terminate = false;
880 res = ca_thread_pool_add_task(threadPool, CAReceiveHandler, NULL);
881 if (CA_STATUS_OK != res)
883 OIC_LOG(ERROR, TAG, "thread_pool_add_task failed");
886 OIC_LOG(DEBUG, TAG, "CAReceiveHandler thread started successfully.");
888 caglobals.tcp.started = true;
892 void CATCPStopServer()
895 ca_mutex_lock(g_mutexObjectList);
897 // set terminate flag
898 caglobals.tcp.terminate = true;
900 if (caglobals.tcp.shutdownFds[1] != -1)
902 close(caglobals.tcp.shutdownFds[1]);
903 // receive thread will stop immediately
906 if (caglobals.tcp.connectionFds[1] != -1)
908 close(caglobals.tcp.connectionFds[1]);
911 if (caglobals.tcp.started)
913 ca_cond_wait(g_condObjectList, g_mutexObjectList);
915 caglobals.tcp.started = false;
918 ca_mutex_unlock(g_mutexObjectList);
920 if (-1 != caglobals.tcp.ipv4.fd)
922 close(caglobals.tcp.ipv4.fd);
923 caglobals.tcp.ipv4.fd = -1;
926 if (-1 != caglobals.tcp.ipv6.fd)
928 close(caglobals.tcp.ipv6.fd);
929 caglobals.tcp.ipv6.fd = -1;
932 CATCPDisconnectAll();
937 void CATCPSetPacketReceiveCallback(CATCPPacketReceivedCallback callback)
939 g_packetReceivedCallback = callback;
942 void CATCPSetConnectionChangedCallback(CATCPConnectionHandleCallback connHandler)
944 g_connectionCallback = connHandler;
947 static size_t CACheckPayloadLength(const void *data, size_t dlen)
949 VERIFY_NON_NULL_RET(data, TAG, "data", -1);
951 coap_transport_type transport = coap_get_tcp_header_type_from_initbyte(
952 ((unsigned char *)data)[0] >> 4);
954 coap_pdu_t *pdu = coap_new_pdu(transport, dlen);
957 OIC_LOG(ERROR, TAG, "outpdu is null");
961 int ret = coap_pdu_parse((unsigned char *) data, dlen, pdu, transport);
964 OIC_LOG(ERROR, TAG, "pdu parse failed");
965 coap_delete_pdu(pdu);
969 size_t payloadLen = 0;
970 size_t headerSize = coap_get_tcp_header_length_for_transport(transport);
971 OIC_LOG_V(DEBUG, TAG, "headerSize : %zu, pdu length : %d",
972 headerSize, pdu->length);
973 if (pdu->length > headerSize)
975 payloadLen = (unsigned char *) pdu->hdr + pdu->length - pdu->data;
983 static void sendData(const CAEndpoint_t *endpoint, const void *data,
984 size_t dlen, const char *fam)
986 // #1. get TCP Server object from list
988 CATCPSessionInfo_t *svritem = CAGetTCPSessionInfoFromEndpoint(endpoint, &index);
991 // if there is no connection info, connect to TCP Server
992 svritem = CAConnectTCPSession(endpoint);
995 OIC_LOG(ERROR, TAG, "Failed to create TCP server object");
996 if (g_tcpErrorHandler)
998 g_tcpErrorHandler(endpoint, data, dlen, CA_SEND_FAILED);
1004 // #2. check payload length
1006 if (false == CAIsTlsMessage(svritem))
1009 size_t payloadLen = CACheckPayloadLength(data, dlen);
1010 // if payload length is zero, disconnect from TCP server
1013 OIC_LOG(DEBUG, TAG, "payload length is zero, disconnect from remote device");
1014 CADisconnectTCPSession(svritem, index);
1019 // #3. 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");
1024 CADisconnectTCPSession(svritem, index);
1025 if (g_tcpErrorHandler)
1027 g_tcpErrorHandler(endpoint, data, dlen, CA_SEND_FAILED);
1032 // #4. send data to TCP Server
1033 ssize_t remainLen = dlen;
1036 ssize_t len = send(svritem->fd, data, remainLen, 0);
1039 if (EWOULDBLOCK != errno)
1041 OIC_LOG_V(ERROR, TAG, "unicast ipv4tcp sendTo failed: %s", strerror(errno));
1042 if (g_tcpErrorHandler)
1044 g_tcpErrorHandler(endpoint, data, dlen, CA_SEND_FAILED);
1052 } while (remainLen > 0);
1054 OIC_LOG_V(INFO, TAG, "unicast %stcp sendTo is successful: %zu bytes", fam, dlen);
1057 void CATCPSendData(CAEndpoint_t *endpoint, const void *data, uint32_t datalen,
1060 VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint is NULL");
1061 VERIFY_NON_NULL_VOID(data, TAG, "data is NULL");
1065 if (caglobals.tcp.ipv6tcpenabled && (endpoint->flags & CA_IPV6))
1067 sendData(endpoint, data, datalen, "ipv6");
1069 if (caglobals.tcp.ipv4tcpenabled && (endpoint->flags & CA_IPV4))
1071 sendData(endpoint, data, datalen, "ipv4");
1076 CAResult_t CAGetTCPInterfaceInformation(CAEndpoint_t **info, uint32_t *size)
1078 VERIFY_NON_NULL(info, TAG, "info is NULL");
1079 VERIFY_NON_NULL(size, TAG, "size is NULL");
1081 return CA_NOT_SUPPORTED;
1084 CATCPSessionInfo_t *CAConnectTCPSession(const CAEndpoint_t *endpoint)
1086 VERIFY_NON_NULL_RET(endpoint, TAG, "endpoint is NULL", NULL);
1088 // #1. create TCP server object
1089 CATCPSessionInfo_t *svritem = (CATCPSessionInfo_t *) OICCalloc(1, sizeof (*svritem));
1092 OIC_LOG(ERROR, TAG, "Out of memory");
1095 memcpy(svritem->sep.endpoint.addr, endpoint->addr, sizeof(svritem->sep.endpoint.addr));
1096 svritem->sep.endpoint.adapter = endpoint->adapter;
1097 svritem->sep.endpoint.port = endpoint->port;
1098 svritem->sep.endpoint.flags = endpoint->flags;
1099 svritem->sep.endpoint.ifindex = endpoint->ifindex;
1101 // #2. create the socket and connect to TCP server
1102 int family = (svritem->sep.endpoint.flags & CA_IPV6) ? AF_INET6 : AF_INET;
1103 int fd = CATCPCreateSocket(family, svritem);
1110 // #3. add TCP connection info to list
1112 ca_mutex_lock(g_mutexObjectList);
1113 if (caglobals.tcp.svrlist)
1115 bool res = u_arraylist_add(caglobals.tcp.svrlist, svritem);
1118 OIC_LOG(ERROR, TAG, "u_arraylist_add failed.");
1121 ca_mutex_unlock(g_mutexObjectList);
1125 ca_mutex_unlock(g_mutexObjectList);
1129 // pass the connection information to CA Common Layer.
1130 if (g_connectionCallback)
1132 g_connectionCallback(&(svritem->sep.endpoint), true);
1138 CAResult_t CADisconnectTCPSession(CATCPSessionInfo_t *svritem, size_t index)
1140 VERIFY_NON_NULL(svritem, TAG, "svritem is NULL");
1142 ca_mutex_lock(g_mutexObjectList);
1144 // close the socket and remove TCP connection info in list
1145 if (svritem->fd >= 0)
1149 u_arraylist_remove(caglobals.tcp.svrlist, index);
1150 OICFree(svritem->data);
1151 svritem->data = NULL;
1153 // pass the connection information to CA Common Layer.
1154 if (g_connectionCallback)
1156 g_connectionCallback(&(svritem->sep.endpoint), false);
1160 ca_mutex_unlock(g_mutexObjectList);
1162 return CA_STATUS_OK;
1165 void CATCPDisconnectAll()
1167 ca_mutex_lock(g_mutexObjectList);
1168 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
1170 CATCPSessionInfo_t *svritem = NULL;
1171 for (size_t i = 0; i < length; i++)
1173 svritem = (CATCPSessionInfo_t *) u_arraylist_get(caglobals.tcp.svrlist, i);
1174 if (svritem && svritem->fd >= 0)
1176 shutdown(svritem->fd, SHUT_RDWR);
1179 OICFree(svritem->data);
1180 svritem->data = NULL;
1183 u_arraylist_destroy(caglobals.tcp.svrlist);
1184 ca_mutex_unlock(g_mutexObjectList);
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 size_t CAGetTotalLengthFromHeader(const unsigned char *recvBuffer)
1242 OIC_LOG(DEBUG, TAG, "IN - CAGetTotalLengthFromHeader");
1244 coap_transport_type transport = coap_get_tcp_header_type_from_initbyte(
1245 ((unsigned char *)recvBuffer)[0] >> 4);
1246 size_t optPaylaodLen = coap_get_length_from_header((unsigned char *)recvBuffer,
1248 size_t headerLen = coap_get_tcp_header_length((unsigned char *)recvBuffer);
1250 OIC_LOG_V(DEBUG, TAG, "option/paylaod length [%zu]", optPaylaodLen);
1251 OIC_LOG_V(DEBUG, TAG, "header length [%zu]", headerLen);
1252 OIC_LOG_V(DEBUG, TAG, "total data length [%zu]", headerLen + optPaylaodLen);
1254 OIC_LOG(DEBUG, TAG, "OUT - CAGetTotalLengthFromHeader");
1255 return headerLen + optPaylaodLen;
1258 void CATCPSetErrorHandler(CATCPErrorHandleCallback errorHandleCallback)
1260 g_tcpErrorHandler = errorHandleCallback;