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>
26 #include <tinyara/config.h>
34 #include <arpa/inet.h>
35 #include <netinet/in.h>
40 #include <sys/socket.h>
41 #include <netinet/in.h>
45 #include "catcpinterface.h"
46 #include "caipnwmonitor.h"
48 #include "caadapterutils.h"
50 #include "oic_malloc.h"
53 #include "ca_adapter_net_ssl.h"
57 * Logging tag for module name.
59 //#define TAG "OIC_CA_TCP_SERVER"
60 #define TAG TCP_SERVER_TAG
63 * Maximum CoAP over TCP header length
64 * to know the total data length.
66 #define COAP_MAX_HEADER_SIZE 6
71 #define TLS_HEADER_SIZE 5
74 * Max Connection Counts.
76 #define MAX_CONNECTION_COUNTS 500
78 #define COAP_TCP_MAX_BUFFER_CHUNK_SIZE 65530 //64kb - 6 (coap+tcp max header size)
80 #define MILLISECONDS_PER_SECOND (1000)
85 static ca_thread_pool_t g_threadPool = NULL;
88 * Mutex to synchronize device object list.
90 static oc_mutex g_mutexObjectList = NULL;
93 * Conditional mutex to synchronize.
95 static oc_cond g_condObjectList = NULL;
98 * Mutex to synchronize send.
100 static oc_mutex g_mutexSend = NULL;
103 * Conditional mutex to synchronize send.
105 static oc_cond g_condSend = NULL;
108 * Maintains the callback to be notified when data received from remote device.
110 static CATCPPacketReceivedCallback g_packetReceivedCallback = NULL;
113 * Error callback to update error in TCP.
115 static CATCPErrorHandleCallback g_tcpErrorHandler = NULL;
118 * Connected Callback to pass the connection information to RI.
120 static CATCPConnectionHandleCallback g_connectionCallback = NULL;
122 static CASocketFd_t CACreateAcceptSocket(int family, CASocket_t *sock);
123 static void CAAcceptConnection(CATransportFlags_t flag, CASocket_t *sock);
124 static void CAFindReadyMessage();
125 static void CASelectReturned(fd_set *readFds);
126 static void CAReceiveMessage(int fd);
127 static void CAReceiveHandler(void *data);
128 static CAResult_t CATCPCreateSocket(int family, CATCPSessionInfo_t *svritem);
129 static void CATCPInitializeSocket();
130 static CATCPSessionInfo_t *CAGetSessionInfoFromFDAsOwner(int fd, size_t *index);
132 #define CHECKFD(FD) \
133 if (FD > caglobals.tcp.maxfd) \
134 caglobals.tcp.maxfd = FD;
136 #define CLOSE_SOCKET(TYPE) \
137 if (caglobals.tcp.TYPE.fd != OC_INVALID_SOCKET) \
139 close(caglobals.tcp.TYPE.fd); \
140 caglobals.tcp.TYPE.fd = OC_INVALID_SOCKET; \
143 #define CA_FD_SET(TYPE, FDS) \
144 if (caglobals.tcp.TYPE.fd != OC_INVALID_SOCKET) \
146 FD_SET(caglobals.tcp.TYPE.fd, FDS); \
149 void CATCPDestroyMutex()
151 if (g_mutexObjectList)
153 oc_mutex_free(g_mutexObjectList);
154 g_mutexObjectList = NULL;
158 CAResult_t CATCPCreateMutex()
160 if (!g_mutexObjectList)
162 g_mutexObjectList = oc_mutex_new();
163 if (!g_mutexObjectList)
165 OIC_LOG(ERROR, TAG, "Failed to create mutex!");
166 return CA_STATUS_FAILED;
173 void CATCPDestroyCond()
175 if (g_condObjectList)
177 oc_cond_free(g_condObjectList);
178 g_condObjectList = NULL;
182 CAResult_t CATCPCreateCond()
184 if (!g_condObjectList)
186 g_condObjectList = oc_cond_new();
187 if (!g_condObjectList)
189 OIC_LOG(ERROR, TAG, "Failed to create cond!");
190 return CA_STATUS_FAILED;
196 void CATCPDestroySendMutex()
200 oc_mutex_free(g_mutexSend);
205 CAResult_t CATCPCreateSendMutex()
209 g_mutexSend = oc_mutex_new();
212 OIC_LOG(ERROR, TAG, "Failed to create send mutex!");
213 return CA_STATUS_FAILED;
220 void CATCPDestroySendCond()
224 oc_cond_free(g_condSend);
229 CAResult_t CATCPCreateSendCond()
233 g_condSend = oc_cond_new();
236 OIC_LOG(ERROR, TAG, "Failed to create send cond!");
237 return CA_STATUS_FAILED;
243 static void CAReceiveHandler(void *data)
246 OIC_LOG(DEBUG, TAG, "IN - CAReceiveHandler");
248 while (!caglobals.tcp.terminate)
250 CAFindReadyMessage();
253 oc_mutex_lock(g_mutexObjectList);
254 oc_cond_signal(g_condObjectList);
255 oc_mutex_unlock(g_mutexObjectList);
257 OIC_LOG(DEBUG, TAG, "OUT - CAReceiveHandler");
260 static void CAFindReadyMessage()
263 struct timeval timeout = { .tv_sec = caglobals.tcp.selectTimeout };
266 CA_FD_SET(ipv4, &readFds);
267 CA_FD_SET(ipv4s, &readFds);
268 CA_FD_SET(ipv6, &readFds);
269 CA_FD_SET(ipv6s, &readFds);
271 if (OC_INVALID_SOCKET != caglobals.tcp.shutdownFds[0])
273 FD_SET(caglobals.tcp.shutdownFds[0], &readFds);
276 if (OC_INVALID_SOCKET != caglobals.tcp.connectionFds[0])
278 FD_SET(caglobals.tcp.connectionFds[0], &readFds);
281 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
282 for (size_t i = 0; i < length; i++)
284 CATCPSessionInfo_t *svritem =
285 (CATCPSessionInfo_t *) u_arraylist_get(caglobals.tcp.svrlist, i);
286 if (svritem && 0 <= svritem->fd && CONNECTED == svritem->state)
288 FD_SET(svritem->fd, &readFds);
292 int ret = select(caglobals.tcp.maxfd + 1, &readFds, NULL, NULL, &timeout);
294 if (caglobals.tcp.terminate)
296 OIC_LOG_V(INFO, TAG, "Packet receiver Stop request received.");
303 OIC_LOG_V(FATAL, TAG, "select error %s", strerror(errno));
308 CASelectReturned(&readFds);
311 static void CASelectReturned(fd_set *readFds)
313 VERIFY_NON_NULL_VOID(readFds, TAG, "readFds is NULL");
315 if (caglobals.tcp.ipv4.fd != -1 && FD_ISSET(caglobals.tcp.ipv4.fd, readFds))
317 CAAcceptConnection(CA_IPV4, &caglobals.tcp.ipv4);
320 else if (caglobals.tcp.ipv4s.fd != -1 && FD_ISSET(caglobals.tcp.ipv4s.fd, readFds))
322 CAAcceptConnection(CA_IPV4 | CA_SECURE, &caglobals.tcp.ipv4s);
325 else if (caglobals.tcp.ipv6.fd != -1 && FD_ISSET(caglobals.tcp.ipv6.fd, readFds))
327 CAAcceptConnection(CA_IPV6, &caglobals.tcp.ipv6);
330 else if (caglobals.tcp.ipv6s.fd != -1 && FD_ISSET(caglobals.tcp.ipv6s.fd, readFds))
332 CAAcceptConnection(CA_IPV6 | CA_SECURE, &caglobals.tcp.ipv6s);
335 else if (-1 != caglobals.tcp.connectionFds[0] &&
336 FD_ISSET(caglobals.tcp.connectionFds[0], readFds))
338 // new connection was created from remote device.
339 // exit the function to update read file descriptor.
340 char buf[MAX_ADDR_STR_SIZE_CA] = {0};
341 ssize_t len = read(caglobals.tcp.connectionFds[0], buf, sizeof (buf));
346 OIC_LOG_V(DEBUG, TAG, "Received new connection event with [%s]", buf);
351 int *readFDList = NULL;
352 size_t readFDListSize = 0;
354 oc_mutex_lock(g_mutexObjectList);
355 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
357 readFDList = (int*) OICCalloc(length, sizeof(int));
358 if (NULL == readFDList)
360 OIC_LOG_V(ERROR, TAG, "Failed to allocate memory!");
361 oc_mutex_unlock(g_mutexObjectList);
365 for (size_t i = 0; i < length; i++)
367 CATCPSessionInfo_t *svritem =
368 (CATCPSessionInfo_t *) u_arraylist_get(caglobals.tcp.svrlist, i);
369 if (svritem && svritem->fd >= 0)
371 if (FD_ISSET(svritem->fd, readFds))
373 readFDList[readFDListSize++] = svritem->fd;
377 oc_mutex_unlock(g_mutexObjectList);
379 // Read incomming messages from fds
380 for (size_t i = 0; i < readFDListSize; i++)
382 CAReceiveMessage(readFDList[i]);
389 static void CAAcceptConnection(CATransportFlags_t flag, CASocket_t *sock)
391 OIC_LOG_V(INFO, TAG, "In %s", __func__);
392 VERIFY_NON_NULL_VOID(sock, TAG, "sock is NULL");
394 if (MAX_CONNECTION_COUNTS == u_arraylist_length(caglobals.tcp.svrlist))
396 OIC_LOG_V(INFO, TAG, "Exceeding the max connection counts limit, close listening port");
398 sock->fd = OC_INVALID_SOCKET;
402 struct sockaddr_storage clientaddr;
403 socklen_t clientlen = sizeof (struct sockaddr_in);
406 clientlen = sizeof(struct sockaddr_in6);
409 CASocketFd_t sockfd = accept(sock->fd, (struct sockaddr *)&clientaddr, &clientlen);
410 if (OC_INVALID_SOCKET != sockfd)
412 CATCPSessionInfo_t *svritem =
413 (CATCPSessionInfo_t *) OICCalloc(1, sizeof (*svritem));
416 OIC_LOG(ERROR, TAG, "Out of memory");
421 svritem->fd = sockfd;
422 svritem->sep.endpoint.flags = flag;
423 svritem->sep.endpoint.adapter = CA_ADAPTER_TCP;
424 svritem->state = CONNECTED;
425 svritem->isClient = false;
426 CAConvertAddrToName((struct sockaddr_storage *)&clientaddr, clientlen,
427 svritem->sep.endpoint.addr, &svritem->sep.endpoint.port);
429 // Allocate message buffer
430 svritem->tlsdata = (unsigned char*) OICCalloc(TLS_DATA_MAX_SIZE, sizeof(unsigned char));
431 if (!svritem->tlsdata)
433 OIC_LOG(ERROR, TAG, "Out of memory");
439 oc_mutex_lock(g_mutexObjectList);
440 bool result = u_arraylist_add(caglobals.tcp.svrlist, svritem);
443 OIC_LOG(ERROR, TAG, "u_arraylist_add failed.");
445 OICFree(svritem->tlsdata);
447 oc_mutex_unlock(g_mutexObjectList);
450 oc_mutex_unlock(g_mutexObjectList);
454 // pass the connection information to CA Common Layer.
455 if (g_connectionCallback)
457 g_connectionCallback(&(svritem->sep.endpoint), true, svritem->isClient);
460 OIC_LOG_V(INFO, TAG, "Out %s", __func__);
464 * Clean socket state data
466 * @param[in/out] item - socket state data
468 void CACleanData(CATCPSessionInfo_t *svritem)
472 OICFree(svritem->data);
473 svritem->data = NULL;
478 svritem->totalLen = 0;
480 svritem->protocol = UNKNOWN;
485 * Construct CoAP header and payload from buffer
487 * @param[in] svritem - used socket, buffer, current received message length and protocol
488 * @param[in/out] data - data buffer, this value is updated as data is copied to svritem
489 * @param[in/out] dataLength - length of data, this value decreased as data is copied to svritem
490 * @return - CA_STATUS_OK or appropriate error code
492 CAResult_t CAConstructCoAP(CATCPSessionInfo_t *svritem, unsigned char **data,
495 OIC_LOG_V(DEBUG, TAG, "In %s", __func__);
497 if (NULL == svritem || NULL == data || NULL == dataLength)
499 OIC_LOG(ERROR, TAG, "Invalid input parameter(NULL)");
500 return CA_STATUS_INVALID_PARAM;
503 unsigned char *inBuffer = *data;
504 size_t inLen = *dataLength;
505 OIC_LOG_V(DEBUG, TAG, "before-datalength : %u", *dataLength);
507 if (NULL == svritem->data && inLen > 0)
509 // allocate memory for message header (CoAP header size because it is bigger)
510 svritem->data = (unsigned char *) OICCalloc(1, COAP_MAX_HEADER_SIZE);
511 if (NULL == svritem->data)
513 OIC_LOG(ERROR, TAG, "OICCalloc - out of memory");
514 return CA_MEMORY_ALLOC_FAILED;
517 // copy 1 byte to parse coap header length
518 memcpy(svritem->data, inBuffer, 1);
520 svritem->bufLen = COAP_MAX_HEADER_SIZE;
525 //if not enough data received - read them on next CAFillHeader() call
531 //if enough data received - parse header
532 svritem->protocol = COAP;
534 //seems CoAP data received. read full coap header.
535 coap_transport_t transport = coap_get_tcp_header_type_from_initbyte(svritem->data[0] >> 4);
536 size_t headerLen = coap_get_tcp_header_length_for_transport(transport);
540 if (svritem->len < headerLen)
542 copyLen = headerLen - svritem->len;
548 //read required bytes to have full CoAP header
549 memcpy(svritem->data + svritem->len, inBuffer, copyLen);
550 svritem->len += copyLen;
554 //if not enough data received - read them on next CAFillHeader() call
555 if (svritem->len < headerLen)
559 OIC_LOG(DEBUG, TAG, "CoAP header received partially. Wait for rest header data");
563 //calculate CoAP message length
564 svritem->totalLen = CAGetTotalLengthFromHeader(svritem->data);
570 // Calculate length of data to be copied.
571 copyLen = svritem->totalLen - svritem->len;
577 // Is buffer not big enough for remaining data ?
578 if (svritem->len + copyLen > svritem->bufLen)
580 // Resize buffer to accommodate enough space
581 size_t extLen = svritem->totalLen - svritem->bufLen;
582 if (extLen > COAP_TCP_MAX_BUFFER_CHUNK_SIZE)
584 extLen = COAP_TCP_MAX_BUFFER_CHUNK_SIZE;
587 // Allocate required memory
588 unsigned char *buffer = OICRealloc(svritem->data, svritem->bufLen + extLen);
591 OIC_LOG(ERROR, TAG, "OICRealloc - out of memory");
592 return CA_MEMORY_ALLOC_FAILED;
595 svritem->data = buffer;
596 svritem->bufLen += extLen;
599 // Read required bytes to have full CoAP payload
600 memcpy(svritem->data + svritem->len, inBuffer, copyLen);
601 svritem->len += copyLen;
609 OIC_LOG_V(DEBUG, TAG, "after-datalength : %u", *dataLength);
610 OIC_LOG_V(DEBUG, TAG, "Out %s", __func__);
614 static void CAReceiveMessage(int fd)
616 CAResult_t res = CA_STATUS_OK;
618 oc_mutex_lock(g_mutexObjectList);
620 //get remote device information from file descriptor.
622 CATCPSessionInfo_t *svritem = CAGetSessionInfoFromFDAsOwner(fd, &index);
625 OIC_LOG(ERROR, TAG, "there is no connection information in list");
626 oc_mutex_unlock(g_mutexObjectList);
630 CASecureEndpoint_t peerEP = svritem->sep;
632 if (svritem->sep.endpoint.flags & CA_SECURE) // Secure connection
634 svritem->protocol = TLS;
638 size_t tlsLength = 0;
640 if (TLS_HEADER_SIZE > svritem->tlsLen)
642 nbRead = TLS_HEADER_SIZE - svritem->tlsLen;
646 //[3][4] bytes in tls header are tls payload length
647 tlsLength = TLS_HEADER_SIZE +
648 (size_t)((svritem->tlsdata[3] << 8) | svritem->tlsdata[4]);
649 OIC_LOG_V(DEBUG, TAG, "total tls length = %u", tlsLength);
650 if (tlsLength > TLS_DATA_MAX_SIZE)
652 OIC_LOG_V(ERROR, TAG, "total tls length is too big (buffer size : %u)",
654 oc_mutex_unlock(g_mutexObjectList);
655 CATCPDisconnectSession(&peerEP.endpoint);
658 nbRead = tlsLength - svritem->tlsLen;
661 len = recv(fd, svritem->tlsdata + svritem->tlsLen, nbRead, 0);
664 OIC_LOG_V(ERROR, TAG, "recv failed %s", strerror(errno));
665 res = CA_RECEIVE_FAILED;
669 OIC_LOG(INFO, TAG, "Received disconnect from peer. Close connection");
670 svritem->state = DISCONNECTED;
671 res = CA_DESTINATION_DISCONNECTED;
675 svritem->tlsLen += len;
676 OIC_LOG_V(DEBUG, TAG, "nb_read : %u bytes , recv() : %d bytes, svritem->tlsLen : %u bytes",
677 nbRead, len, svritem->tlsLen);
678 if (tlsLength > 0 && tlsLength == svritem->tlsLen)
680 // When successfully read data - pass them to callback.
681 // Dont invoke callback locking mutex
682 unsigned char *mesBuf = svritem->tlsdata;
683 size_t mesBufLen = svritem->tlsLen;
684 svritem->tlsdata = NULL;
685 oc_mutex_unlock(g_mutexObjectList);
687 res = CAdecryptSsl(&peerEP, (uint8_t *)mesBuf, mesBufLen);
688 OIC_LOG_V(INFO, TAG, "%s: CAdecryptSsl returned %d", __func__, res);
690 // Check for the svritem and reset buffer
691 oc_mutex_lock(g_mutexObjectList);
692 svritem = CAGetSessionInfoFromFDAsOwner(fd, &index);
695 svritem->tlsdata = mesBuf;
700 // svritem does not exist, thus free the message buffer
701 OIC_LOG(ERROR, TAG, "svritem not found. Freeing message buffer!");
708 else // Non-Secure connection
710 svritem->protocol = COAP;
712 // svritem->tlsdata can also be used as receiving buffer in case of raw tcp
713 len = recv(fd, svritem->tlsdata, TLS_DATA_MAX_SIZE, 0);
716 OIC_LOG_V(ERROR, TAG, "recv failed %s", strerror(errno));
717 res = CA_RECEIVE_FAILED;
721 OIC_LOG(INFO, TAG, "Received disconnect from peer. Close connection");
722 res = CA_DESTINATION_DISCONNECTED;
726 //when successfully read data - pass them to callback.
727 OIC_LOG_V(DEBUG, TAG, "recv() : %d bytes", len);
728 if (g_packetReceivedCallback)
730 // Dont invoke callback locking mutex
731 unsigned char *mesBuf = svritem->tlsdata;
732 svritem->tlsdata = NULL;
733 oc_mutex_unlock(g_mutexObjectList);
735 res = g_packetReceivedCallback(&peerEP, mesBuf, len);
737 // Check for the svritem and reset buffer
738 oc_mutex_lock(g_mutexObjectList);
739 svritem = CAGetSessionInfoFromFDAsOwner(fd, &index);
742 svritem->tlsdata = mesBuf;
747 // svritem does not exist, thus free the message buffer
748 OIC_LOG(ERROR, TAG, "svritem not found. Freeing message buffer!");
755 oc_mutex_unlock(g_mutexObjectList);
757 if (res != CA_STATUS_OK)
759 CATCPDisconnectSession(&peerEP.endpoint);
763 static ssize_t CAWakeUpForReadFdsUpdate(const char *host)
765 if (caglobals.tcp.connectionFds[1] != -1)
770 len = write(caglobals.tcp.connectionFds[1], host, strlen(host));
771 } while ((len == -1) && (errno == EINTR));
773 if ((len == -1) && (errno != EINTR) && (errno != EPIPE))
775 OIC_LOG_V(DEBUG, TAG, "write failed: %s", strerror(errno));
782 static CAResult_t CATCPConvertNameToAddr(int family, const char *host, uint16_t port,
783 struct sockaddr_storage *sockaddr)
785 struct addrinfo *addrs = NULL;
786 struct addrinfo hints = { .ai_family = family,
787 .ai_protocol = IPPROTO_TCP,
788 .ai_socktype = SOCK_STREAM,
789 .ai_flags = AI_NUMERICHOST };
791 int r = getaddrinfo(host, NULL, &hints, &addrs);
796 OIC_LOG_V(ERROR, TAG, "getaddrinfo failed: errno %s", strerror(errno));
800 OIC_LOG_V(ERROR, TAG, "getaddrinfo failed: %s", gai_strerror(r));
803 return CA_STATUS_FAILED;
805 // assumption: in this case, getaddrinfo will only return one addrinfo
806 // or first is the one we want.
807 if (addrs[0].ai_family == AF_INET6)
809 memcpy(sockaddr, addrs[0].ai_addr, sizeof (struct sockaddr_in6));
810 ((struct sockaddr_in6 *)sockaddr)->sin6_port = htons(port);
814 memcpy(sockaddr, addrs[0].ai_addr, sizeof (struct sockaddr_in));
815 ((struct sockaddr_in *)sockaddr)->sin_port = htons(port);
821 static CAResult_t CATCPCreateSocket(int family, CATCPSessionInfo_t *svritem)
823 VERIFY_NON_NULL(svritem, TAG, "svritem is NULL");
825 OIC_LOG_V(INFO, TAG, "try to connect with [%s:%u]",
826 svritem->sep.endpoint.addr, svritem->sep.endpoint.port);
828 // #1. create tcp socket.
829 int fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
832 OIC_LOG_V(ERROR, TAG, "create socket failed: %s", strerror(errno));
833 return CA_SOCKET_OPERATION_FAILED;
837 // #2. convert address from string to binary.
838 struct sockaddr_storage sa = { .ss_family = family };
839 CAResult_t res = CATCPConvertNameToAddr(family, svritem->sep.endpoint.addr,
840 svritem->sep.endpoint.port, &sa);
841 if (CA_STATUS_OK != res)
843 OIC_LOG(ERROR, TAG, "convert name to sockaddr failed");
844 return CA_SOCKET_OPERATION_FAILED;
847 // #3. set socket length.
848 socklen_t socklen = 0;
849 if (sa.ss_family == AF_INET6)
851 struct sockaddr_in6 *sock6 = (struct sockaddr_in6 *)&sa;
852 if (!sock6->sin6_scope_id)
854 sock6->sin6_scope_id = svritem->sep.endpoint.ifindex;
856 socklen = sizeof(struct sockaddr_in6);
860 socklen = sizeof(struct sockaddr_in);
863 // #4. connect to remote server device.
864 if (connect(fd, (struct sockaddr *)&sa, socklen) < 0)
866 OIC_LOG_V(ERROR, TAG, "failed to connect socket, %s", strerror(errno));
867 CALogSendStateInfo(svritem->sep.endpoint.adapter, svritem->sep.endpoint.addr,
868 svritem->sep.endpoint.port, 0, false, strerror(errno));
869 return CA_SOCKET_OPERATION_FAILED;
872 OIC_LOG(INFO, TAG, "connect socket success");
873 svritem->state = CONNECTED;
874 CHECKFD(svritem->fd);
875 ssize_t len = CAWakeUpForReadFdsUpdate(svritem->sep.endpoint.addr);
878 OIC_LOG(ERROR, TAG, "wakeup receive thread failed");
879 return CA_SOCKET_OPERATION_FAILED;
884 static CASocketFd_t CACreateAcceptSocket(int family, CASocket_t *sock)
886 VERIFY_NON_NULL_RET(sock, TAG, "sock", -1);
888 if (OC_INVALID_SOCKET != sock->fd)
890 OIC_LOG(DEBUG, TAG, "accept socket created already");
894 socklen_t socklen = 0;
895 struct sockaddr_storage server = { .ss_family = family };
897 int fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
898 if (OC_INVALID_SOCKET == fd)
900 OIC_LOG(ERROR, TAG, "Failed to create socket");
904 if (family == AF_INET6)
906 // the socket is restricted to sending and receiving IPv6 packets only.
908 //TODO: enable once IPv6 is supported
910 if (-1 == setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof (on)))
912 OIC_LOG_V(ERROR, TAG, "IPV6_V6ONLY failed: %s", strerror(errno));
916 ((struct sockaddr_in6 *)&server)->sin6_port = htons(sock->port);
917 socklen = sizeof (struct sockaddr_in6);
921 ((struct sockaddr_in *)&server)->sin_port = htons(sock->port);
922 socklen = sizeof (struct sockaddr_in);
926 if (-1 == setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)))
928 OIC_LOG(ERROR, TAG, "setsockopt SO_REUSEADDR");
932 if (-1 == bind(fd, (struct sockaddr *)&server, socklen))
934 OIC_LOG_V(ERROR, TAG, "bind socket failed: %s", strerror(errno));
938 if (listen(fd, caglobals.tcp.listenBacklog) != 0)
940 OIC_LOG(ERROR, TAG, "listen() error");
944 if (sock->port) // use the given port
947 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, OPTVAL_T(&on), sizeof (on)))
949 OIC_LOG_V(ERROR, TAG, "SO_REUSEADDR failed: %s", strerror(errno));
951 return OC_INVALID_SOCKET;
954 else // return the assigned port
956 if (-1 == getsockname(fd, (struct sockaddr *)&server, &socklen))
958 OIC_LOG_V(ERROR, TAG, "getsockname failed: %s", strerror(errno));
961 sock->port = ntohs(family == AF_INET6 ?
962 ((struct sockaddr_in6 *)&server)->sin6_port :
963 ((struct sockaddr_in *)&server)->sin_port);
973 return OC_INVALID_SOCKET;
976 static void CAInitializePipe(int *fds)
979 // TODO: Remove temporary workaround once F_GETFD / F_SETFD support is in TizenRT
980 /* Temporary workaround: By pass F_GETFD / F_SETFD */
990 OIC_LOG_V(ERROR, TAG, "pipe failed: %s", strerror(errno));
995 ret = fcntl(fds[0], F_GETFD);
998 ret = fcntl(fds[0], F_SETFD, ret|FD_CLOEXEC);
1002 ret = fcntl(fds[1], F_GETFD);
1006 ret = fcntl(fds[1], F_SETFD, ret|FD_CLOEXEC);
1016 OIC_LOG_V(ERROR, TAG, "pipe failed: %s", strerror(errno));
1022 #define NEWSOCKET(FAMILY, NAME) \
1023 caglobals.tcp.NAME.fd = CACreateAcceptSocket(FAMILY, &caglobals.tcp.NAME); \
1024 if (caglobals.tcp.NAME.fd == -1) \
1026 caglobals.tcp.NAME.port = 0; \
1027 caglobals.tcp.NAME.fd = CACreateAcceptSocket(FAMILY, &caglobals.tcp.NAME); \
1029 CHECKFD(caglobals.tcp.NAME.fd);
1031 void CATCPInitializeSocket()
1033 #ifndef __WITH_TLS__
1034 NEWSOCKET(AF_INET, ipv4);
1036 NEWSOCKET(AF_INET, ipv4s);
1039 //TODO Enable once TizenRT supports IPv6
1041 #ifndef __WITH_TLS__
1042 NEWSOCKET(AF_INET6, ipv6);
1044 NEWSOCKET(AF_INET6, ipv6s);
1047 #ifndef __WITH_TLS__
1048 OIC_LOG_V(DEBUG, TAG, "IPv4 socket fd=%d, port=%d",
1049 caglobals.tcp.ipv4.fd, caglobals.tcp.ipv4.port);
1050 OIC_LOG_V(DEBUG, TAG, "IPv6 socket fd=%d, port=%d",
1051 caglobals.tcp.ipv6.fd, caglobals.tcp.ipv6.port);
1053 OIC_LOG_V(DEBUG, TAG, "IPv4 secure socket fd=%d, port=%d",
1054 caglobals.tcp.ipv4s.fd, caglobals.tcp.ipv4s.port);
1055 OIC_LOG_V(DEBUG, TAG, "IPv6 secure socket fd=%d, port=%d",
1056 caglobals.tcp.ipv6s.fd, caglobals.tcp.ipv6s.port);
1060 CAResult_t CATCPStartServer(const ca_thread_pool_t threadPool)
1062 oc_mutex_lock(g_mutexObjectList);
1063 if (caglobals.tcp.started)
1065 oc_mutex_unlock(g_mutexObjectList);
1066 OIC_LOG(INFO, TAG, "Adapter is started already");
1067 return CA_STATUS_OK;
1070 g_threadPool = threadPool;
1072 if (!caglobals.tcp.ipv4tcpenabled)
1074 caglobals.tcp.ipv4tcpenabled = true; // only needed to run CA tests
1076 if (!caglobals.tcp.ipv6tcpenabled)
1078 caglobals.tcp.ipv6tcpenabled = true; // only needed to run CA tests
1081 caglobals.tcp.terminate = false;
1082 if (!caglobals.tcp.svrlist)
1084 caglobals.tcp.svrlist = u_arraylist_create();
1087 if (caglobals.server)
1089 CATCPInitializeSocket();
1092 // create pipe for fast shutdown
1093 CAInitializePipe(caglobals.tcp.shutdownFds);
1094 CHECKFD(caglobals.tcp.shutdownFds[0]);
1095 CHECKFD(caglobals.tcp.shutdownFds[1]);
1097 // create pipe for connection event
1098 CAInitializePipe(caglobals.tcp.connectionFds);
1099 CHECKFD(caglobals.tcp.connectionFds[0]);
1100 CHECKFD(caglobals.tcp.connectionFds[1]);
1102 CAResult_t res = CA_STATUS_OK;
1104 res = ca_thread_pool_add_task(g_threadPool, CAReceiveHandler, NULL, NULL);
1106 res = ca_thread_pool_add_task(g_threadPool, CAReceiveHandler, NULL, NULL,
1107 "IoT_TCPReceive", CONFIG_IOTIVITY_TCPRECEIVE_PTHREAD_STACKSIZE);
1109 if (CA_STATUS_OK != res)
1111 oc_mutex_unlock(g_mutexObjectList);
1112 OIC_LOG(ERROR, TAG, "thread_pool_add_task failed");
1117 caglobals.tcp.started = true;
1118 oc_mutex_unlock(g_mutexObjectList);
1120 OIC_LOG(INFO, TAG, "CAReceiveHandler thread started successfully.");
1121 return CA_STATUS_OK;
1124 void CATCPStopServer()
1126 oc_mutex_lock(g_mutexObjectList);
1127 if (caglobals.tcp.terminate)
1129 oc_mutex_unlock(g_mutexObjectList);
1130 OIC_LOG(INFO, TAG, "Adapter is not enabled");
1134 // set terminate flag.
1135 caglobals.tcp.terminate = true;
1137 oc_mutex_lock(g_mutexSend);
1138 oc_cond_signal(g_condSend);
1139 oc_mutex_unlock(g_mutexSend);
1142 if (caglobals.tcp.started)
1144 oc_cond_wait(g_condObjectList, g_mutexObjectList);
1145 caglobals.tcp.started = false;
1149 // close accept socket.
1150 #ifndef __WITH_TLS__
1154 CLOSE_SOCKET(ipv4s);
1155 CLOSE_SOCKET(ipv6s);
1158 close(caglobals.tcp.connectionFds[1]);
1159 close(caglobals.tcp.connectionFds[0]);
1160 caglobals.tcp.connectionFds[1] = OC_INVALID_SOCKET;
1161 caglobals.tcp.connectionFds[0] = OC_INVALID_SOCKET;
1163 if (caglobals.tcp.shutdownFds[1] != OC_INVALID_SOCKET)
1165 close(caglobals.tcp.shutdownFds[1]);
1166 caglobals.tcp.shutdownFds[1] = OC_INVALID_SOCKET;
1167 // receive thread will stop immediately
1169 if (caglobals.tcp.started)
1171 oc_cond_wait(g_condObjectList, g_mutexObjectList);
1172 caglobals.tcp.started = false;
1174 if (caglobals.tcp.shutdownFds[0] != OC_INVALID_SOCKET)
1176 close(caglobals.tcp.shutdownFds[0]);
1177 caglobals.tcp.shutdownFds[0] = OC_INVALID_SOCKET;
1180 oc_mutex_unlock(g_mutexObjectList);
1182 CATCPDisconnectAll();
1185 OIC_LOG(INFO, TAG, "Adapter terminated successfully");
1188 void CATCPSetPacketReceiveCallback(CATCPPacketReceivedCallback callback)
1190 g_packetReceivedCallback = callback;
1193 void CATCPSetConnectionChangedCallback(CATCPConnectionHandleCallback connHandler)
1195 g_connectionCallback = connHandler;
1198 size_t CACheckPayloadLengthFromHeader(const void *data, size_t dlen)
1200 VERIFY_NON_NULL_RET(data, TAG, "data", -1);
1202 coap_transport_t transport = coap_get_tcp_header_type_from_initbyte(
1203 ((unsigned char *)data)[0] >> 4);
1205 coap_pdu_t *pdu = coap_new_pdu2(transport, dlen);
1208 OIC_LOG(ERROR, TAG, "outpdu is null");
1209 OIC_LOG_V(ERROR, TAG, "data length: %zu", dlen);
1213 int ret = coap_pdu_parse2((unsigned char *) data, dlen, pdu, transport);
1216 OIC_LOG(ERROR, TAG, "pdu parse failed");
1217 coap_delete_pdu(pdu);
1221 size_t payloadLen = 0;
1222 size_t headerSize = coap_get_tcp_header_length_for_transport(transport);
1223 OIC_LOG_V(DEBUG, TAG, "headerSize : %zu, pdu length : %d",
1224 headerSize, pdu->length);
1225 if (pdu->length > headerSize)
1227 payloadLen = (unsigned char *) pdu->hdr + pdu->length - pdu->data;
1235 static ssize_t sendData(const CAEndpoint_t *endpoint, const void *data,
1236 size_t dlen, const char *fam)
1238 OIC_LOG_V(INFO, TAG, "The length of data that needs to be sent is %zu bytes", dlen);
1240 // #1. find a session info from list.
1241 CASocketFd_t sockFd = CAGetSocketFDFromEndpoint(endpoint);
1242 if (OC_INVALID_SOCKET == sockFd)
1244 // if there is no connection info, connect to remote device.
1245 sockFd = CAConnectTCPSession(endpoint);
1246 if (OC_INVALID_SOCKET == sockFd)
1248 OIC_LOG(ERROR, TAG, "Failed to create tcp session object");
1253 // #2. send data to remote device.
1254 ssize_t remainLen = dlen;
1255 unsigned int sendRetryTime = 1;
1259 ssize_t len = send(sockFd, data, remainLen, MSG_DONTWAIT | MSG_NOSIGNAL);
1261 ssize_t len = send(sockFd, data, remainLen, MSG_DONTWAIT);
1265 if (EWOULDBLOCK != errno && EAGAIN != errno)
1267 OIC_LOG_V(ERROR, TAG, "unicast ipv4tcp sendTo failed: %s", strerror(errno));
1268 CALogSendStateInfo(endpoint->adapter, endpoint->addr, endpoint->port,
1269 len, false, strerror(errno));
1273 // re-trying send after 10, 20, 40, 80, 160 and 320 milliseconds
1274 if (sendRetryTime > 32)
1279 unsigned int waitTime = sendRetryTime * 10 * MILLISECONDS_PER_SECOND;
1280 OIC_LOG_V(WARNING, TAG, "send blocked. trying send after %u microseconds", waitTime);
1282 oc_mutex_lock(g_mutexSend);
1283 oc_cond_wait_for(g_condSend, g_mutexSend, waitTime);
1284 oc_mutex_unlock(g_mutexSend);
1286 if (caglobals.tcp.terminate)
1291 sendRetryTime = (sendRetryTime << 1);
1298 } while (remainLen > 0);
1303 OIC_LOG_V(INFO, TAG, "unicast %stcp sendTo is successful: %zu bytes", fam, dlen);
1304 CALogSendStateInfo(endpoint->adapter, endpoint->addr, endpoint->port,
1309 ssize_t CATCPSendData(CAEndpoint_t *endpoint, const void *data, size_t datalen)
1311 VERIFY_NON_NULL_RET(endpoint, TAG, "endpoint is NULL", -1);
1312 VERIFY_NON_NULL_RET(data, TAG, "data is NULL", -1);
1314 if (caglobals.tcp.ipv6tcpenabled && (endpoint->flags & CA_IPV6))
1316 return sendData(endpoint, data, datalen, "ipv6");
1318 if (caglobals.tcp.ipv4tcpenabled && (endpoint->flags & CA_IPV4))
1320 return sendData(endpoint, data, datalen, "ipv4");
1323 OIC_LOG(ERROR, TAG, "Not supported transport flags");
1327 CAResult_t CAGetTCPInterfaceInformation(CAEndpoint_t **info, uint32_t *size)
1329 VERIFY_NON_NULL(info, TAG, "info is NULL");
1330 VERIFY_NON_NULL(size, TAG, "size is NULL");
1332 return CA_NOT_SUPPORTED;
1335 CASocketFd_t CAConnectTCPSession(const CAEndpoint_t *endpoint)
1337 VERIFY_NON_NULL_RET(endpoint, TAG, "endpoint is NULL", OC_INVALID_SOCKET);
1339 // #1. create TCP server object
1340 CATCPSessionInfo_t *svritem = (CATCPSessionInfo_t *) OICCalloc(1, sizeof (*svritem));
1343 OIC_LOG(ERROR, TAG, "Out of memory");
1344 return OC_INVALID_SOCKET;
1346 memcpy(svritem->sep.endpoint.addr, endpoint->addr, sizeof(svritem->sep.endpoint.addr));
1347 svritem->sep.endpoint.adapter = endpoint->adapter;
1348 svritem->sep.endpoint.port = endpoint->port;
1349 svritem->sep.endpoint.flags = endpoint->flags;
1350 svritem->sep.endpoint.ifindex = endpoint->ifindex;
1351 svritem->state = CONNECTING;
1352 svritem->isClient = true;
1354 // Allocate message buffer
1355 svritem->tlsdata = (unsigned char*) OICCalloc(TLS_DATA_MAX_SIZE, sizeof(unsigned char));
1356 if (!svritem->tlsdata)
1358 OIC_LOG(ERROR, TAG, "Out of memory");
1360 return OC_INVALID_SOCKET;
1363 // #2. add TCP connection info to list
1364 oc_mutex_lock(g_mutexObjectList);
1365 if (caglobals.tcp.svrlist)
1367 bool res = u_arraylist_add(caglobals.tcp.svrlist, svritem);
1370 OIC_LOG(ERROR, TAG, "u_arraylist_add failed.");
1372 OICFree(svritem->tlsdata);
1374 oc_mutex_unlock(g_mutexObjectList);
1375 return OC_INVALID_SOCKET;
1378 oc_mutex_unlock(g_mutexObjectList);
1380 // #3. create the socket and connect to TCP server
1381 int family = (svritem->sep.endpoint.flags & CA_IPV6) ? AF_INET6 : AF_INET;
1382 if (CA_STATUS_OK != CATCPCreateSocket(family, svritem))
1384 return OC_INVALID_SOCKET;
1387 // #4. pass the connection information to CA Common Layer.
1388 if (g_connectionCallback)
1390 g_connectionCallback(&(svritem->sep.endpoint), true, svritem->isClient);
1396 CAResult_t CADisconnectTCPSession(size_t index)
1398 CATCPSessionInfo_t *removedData = u_arraylist_remove(caglobals.tcp.svrlist, index);
1401 OIC_LOG(DEBUG, TAG, "there is no data to be removed");
1402 return CA_STATUS_OK;
1405 // close the socket and remove session info in list.
1406 if (removedData->fd >= 0)
1408 shutdown(removedData->fd, SHUT_RDWR);
1409 close(removedData->fd);
1410 removedData->fd = -1;
1411 removedData->state = (CONNECTED == removedData->state) ?
1412 DISCONNECTED : removedData->state;
1414 // pass the connection information to CA Common Layer.
1415 if (g_connectionCallback && DISCONNECTED == removedData->state)
1417 g_connectionCallback(&(removedData->sep.endpoint), false, removedData->isClient);
1420 OICFree(removedData->data);
1421 removedData->data = NULL;
1423 OICFree(removedData->tlsdata);
1424 removedData->tlsdata = NULL;
1426 OICFree(removedData);
1429 OIC_LOG(DEBUG, TAG, "data is removed from session list");
1431 if (caglobals.server && MAX_CONNECTION_COUNTS == u_arraylist_length(caglobals.tcp.svrlist) + 1)
1433 CATCPInitializeSocket();
1435 return CA_STATUS_OK;
1438 void CATCPDisconnectAll()
1440 OIC_LOG(DEBUG, TAG, "IN - CATCPDisconnectAll");
1442 oc_mutex_lock(g_mutexObjectList);
1444 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
1445 for (ssize_t index = length; index > 0; index--)
1447 // disconnect session from remote device.
1448 CADisconnectTCPSession(index - 1);
1451 u_arraylist_destroy(caglobals.tcp.svrlist);
1452 caglobals.tcp.svrlist = NULL;
1454 oc_mutex_unlock(g_mutexObjectList);
1457 CAcloseSslConnectionAll(CA_ADAPTER_TCP);
1460 OIC_LOG(DEBUG, TAG, "OUT - CATCPDisconnectAll");
1463 CATCPSessionInfo_t *CAGetTCPSessionInfoFromEndpoint(const CAEndpoint_t *endpoint, size_t *index)
1465 VERIFY_NON_NULL_RET(endpoint, TAG, "endpoint is NULL", NULL);
1466 VERIFY_NON_NULL_RET(index, TAG, "index is NULL", NULL);
1468 OIC_LOG_V(DEBUG, TAG, "Looking for [%s:%d]", endpoint->addr, endpoint->port);
1470 // get connection info from list
1471 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
1472 for (size_t i = 0; i < length; i++)
1474 CATCPSessionInfo_t *svritem = (CATCPSessionInfo_t *) u_arraylist_get(
1475 caglobals.tcp.svrlist, i);
1481 if (!strncmp(svritem->sep.endpoint.addr, endpoint->addr,
1482 sizeof(svritem->sep.endpoint.addr))
1483 && (svritem->sep.endpoint.port == endpoint->port)
1484 && (svritem->sep.endpoint.flags & endpoint->flags))
1486 OIC_LOG(DEBUG, TAG, "Found in session list");
1492 OIC_LOG(DEBUG, TAG, "Session not found");
1496 CASocketFd_t CAGetSocketFDFromEndpoint(const CAEndpoint_t *endpoint)
1498 VERIFY_NON_NULL_RET(endpoint, TAG, "endpoint is NULL", OC_INVALID_SOCKET);
1500 OIC_LOG_V(DEBUG, TAG, "Looking for [%s:%d]", endpoint->addr, endpoint->port);
1502 // get connection info from list.
1503 oc_mutex_lock(g_mutexObjectList);
1504 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
1505 for (size_t i = 0; i < length; i++)
1507 CATCPSessionInfo_t *svritem = (CATCPSessionInfo_t *) u_arraylist_get(
1508 caglobals.tcp.svrlist, i);
1514 if (!strncmp(svritem->sep.endpoint.addr, endpoint->addr,
1515 sizeof(svritem->sep.endpoint.addr))
1516 && (svritem->sep.endpoint.port == endpoint->port)
1517 && (svritem->sep.endpoint.flags & endpoint->flags))
1519 oc_mutex_unlock(g_mutexObjectList);
1520 OIC_LOG(DEBUG, TAG, "Found in session list");
1525 oc_mutex_unlock(g_mutexObjectList);
1526 OIC_LOG(DEBUG, TAG, "Session not found");
1527 return OC_INVALID_SOCKET;
1530 CATCPSessionInfo_t *CAGetSessionInfoFromFD(int fd, size_t *index)
1533 // check from the last item.
1534 CATCPSessionInfo_t *svritem = NULL;
1535 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
1536 for (size_t i = 0; i < length; i++)
1538 svritem = (CATCPSessionInfo_t *) u_arraylist_get(caglobals.tcp.svrlist, i);
1540 if (svritem && svritem->fd == fd)
1543 oc_mutex_unlock(g_mutexObjectList);
1552 static CATCPSessionInfo_t *CAGetSessionInfoFromFDAsOwner(int fd, size_t *index)
1554 CATCPSessionInfo_t *svritem = NULL;
1555 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
1556 for (size_t i = 0; i < length; i++)
1558 svritem = (CATCPSessionInfo_t *) u_arraylist_get(caglobals.tcp.svrlist, i);
1560 if (svritem && svritem->fd == fd)
1570 CAResult_t CASearchAndDeleteTCPSession(const CAEndpoint_t *endpoint)
1572 oc_mutex_lock(g_mutexObjectList);
1574 CAResult_t result = CA_STATUS_OK;
1576 CATCPSessionInfo_t *svritem = CAGetTCPSessionInfoFromEndpoint(endpoint, &index);
1579 result = CADisconnectTCPSession(index);
1580 if (CA_STATUS_OK != result)
1582 OIC_LOG_V(ERROR, TAG, "CADisconnectTCPSession failed, result[%d]", result);
1586 oc_mutex_unlock(g_mutexObjectList);
1590 void CATCPCloseInProgressConnections()
1592 OIC_LOG(INFO, TAG, "IN - CATCPCloseInProgressConnections");
1594 oc_mutex_lock(g_mutexObjectList);
1596 uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
1597 for (size_t index = 0; index < length; index++)
1599 CATCPSessionInfo_t *svritem = (CATCPSessionInfo_t *) u_arraylist_get(
1600 caglobals.tcp.svrlist, index);
1606 // Session which are connecting state
1607 if (svritem->fd >= 0 && svritem->state == CONNECTING)
1609 shutdown(svritem->fd, SHUT_RDWR);
1612 svritem->state = DISCONNECTED;
1616 oc_mutex_unlock(g_mutexObjectList);
1618 OIC_LOG(INFO, TAG, "OUT - CATCPCloseInProgressConnections");
1621 size_t CAGetTotalLengthFromHeader(const unsigned char *recvBuffer)
1623 OIC_LOG(DEBUG, TAG, "IN - CAGetTotalLengthFromHeader");
1625 coap_transport_t transport = coap_get_tcp_header_type_from_initbyte(
1626 ((unsigned char *)recvBuffer)[0] >> 4);
1627 size_t optPaylaodLen = coap_get_length_from_header((unsigned char *)recvBuffer,
1629 size_t headerLen = coap_get_tcp_header_length((unsigned char *)recvBuffer);
1631 OIC_LOG_V(DEBUG, TAG, "option/paylaod length [%zu]", optPaylaodLen);
1632 OIC_LOG_V(DEBUG, TAG, "header length [%zu]", headerLen);
1633 OIC_LOG_V(DEBUG, TAG, "total data length [%zu]", headerLen + optPaylaodLen);
1635 OIC_LOG(DEBUG, TAG, "OUT - CAGetTotalLengthFromHeader");
1636 return headerLen + optPaylaodLen;
1639 void CATCPSetErrorHandler(CATCPErrorHandleCallback errorHandleCallback)
1641 g_tcpErrorHandler = errorHandleCallback;