1 /*****************************************************************j
3 * Copyright 2014 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 #define __APPLE_USE_RFC_3542 // for PKTINFO
22 #define _GNU_SOURCE // for in6_pktinfo
24 #include <sys/types.h>
25 #include <sys/socket.h>
28 #include <sys/types.h>
30 #include <sys/select.h>
31 #include <arpa/inet.h>
32 #include <netinet/in.h>
36 #include <linux/netlink.h>
37 #include <linux/rtnetlink.h>
41 #include "caipinterface.h"
42 #include "caadapterutils.h"
44 #include "caadapternetdtls.h"
47 #include "oic_malloc.h"
48 #include "oic_string.h"
52 * @brief Logging tag for module name
54 #define TAG "IP_SERVER"
56 #define SELECT_TIMEOUT 1 // select() seconds (and termination latency)
58 #define IPv4_MULTICAST "224.0.1.187"
59 static struct in_addr IPv4MulticastAddress = { 0 };
61 #define IPv6_DOMAINS 16
62 #define IPv6_MULTICAST_INT "ff01::fd"
63 static struct in6_addr IPv6MulticastAddressInt;
64 #define IPv6_MULTICAST_LNK "ff02::fd"
65 static struct in6_addr IPv6MulticastAddressLnk;
66 #define IPv6_MULTICAST_RLM "ff03::fd"
67 static struct in6_addr IPv6MulticastAddressRlm;
68 #define IPv6_MULTICAST_ADM "ff04::fd"
69 static struct in6_addr IPv6MulticastAddressAdm;
70 #define IPv6_MULTICAST_SIT "ff05::fd"
71 static struct in6_addr IPv6MulticastAddressSit;
72 #define IPv6_MULTICAST_ORG "ff08::fd"
73 static struct in6_addr IPv6MulticastAddressOrg;
74 #define IPv6_MULTICAST_GLB "ff0e::fd"
75 static struct in6_addr IPv6MulticastAddressGlb;
77 static char *ipv6mcnames[IPv6_DOMAINS] = {
96 static CAIPExceptionCallback g_exceptionCallback;
98 static CAIPPacketReceivedCallback g_packetReceivedCallback;
100 static void CAHandleNetlink();
101 static void CAFindReadyMessage();
102 static void CASelectReturned(fd_set *readFds, int ret);
103 static void CAProcessNewInterface(CAInterface_t *ifchanged);
104 static CAResult_t CAReceiveMessage(int fd, CATransportFlags_t flags);
106 #define SET(TYPE, FDS) \
107 if (caglobals.ip.TYPE.fd != -1) \
109 FD_SET(caglobals.ip.TYPE.fd, FDS); \
112 #define ISSET(TYPE, FDS, FLAGS) \
113 if (caglobals.ip.TYPE.fd != -1 && FD_ISSET(caglobals.ip.TYPE.fd, FDS)) \
115 fd = caglobals.ip.TYPE.fd; \
119 static void CAReceiveHandler(void *data)
122 OIC_LOG(DEBUG, TAG, "IN");
124 while (!caglobals.ip.terminate)
126 CAFindReadyMessage();
129 OIC_LOG(DEBUG, TAG, "OUT");
132 static void CAFindReadyMessage()
135 struct timeval timeout;
137 timeout.tv_sec = caglobals.ip.selectTimeout;
139 struct timeval *tv = caglobals.ip.selectTimeout == -1 ? NULL : &timeout;
150 if (caglobals.ip.shutdownFds[0] != -1)
152 FD_SET(caglobals.ip.shutdownFds[0], &readFds);
154 if (caglobals.ip.netlinkFd != -1)
156 FD_SET(caglobals.ip.netlinkFd, &readFds);
159 int ret = select(caglobals.ip.maxfd + 1, &readFds, NULL, NULL, tv);
161 if (caglobals.ip.terminate)
163 OIC_LOG_V(DEBUG, TAG, "Packet receiver Stop request received.");
170 OIC_LOG_V(FATAL, TAG, "select error %s", strerror(errno));
175 CASelectReturned(&readFds, ret);
178 static void CASelectReturned(fd_set *readFds, int ret)
182 CATransportFlags_t flags = CA_DEFAULT_FLAGS;
184 while (!caglobals.ip.terminate)
186 ISSET(u6, readFds, CA_IPV6)
187 else ISSET(u6s, readFds, CA_IPV6 | CA_SECURE)
188 else ISSET(u4, readFds, CA_IPV4)
189 else ISSET(u4s, readFds, CA_IPV4 | CA_SECURE)
190 else ISSET(m6, readFds, CA_MULTICAST | CA_IPV6)
191 else ISSET(m6s, readFds, CA_MULTICAST | CA_IPV6 | CA_SECURE)
192 else ISSET(m4, readFds, CA_MULTICAST | CA_IPV4)
193 else ISSET(m4s, readFds, CA_MULTICAST | CA_IPV4 | CA_SECURE)
194 else if (FD_ISSET(caglobals.ip.netlinkFd, readFds))
201 CAInterface_t *ifchanged = CAFindInterfaceChange();
204 CAProcessNewInterface(ifchanged);
210 (void)CAReceiveMessage(fd, flags);
215 static CAResult_t CAReceiveMessage(int fd, CATransportFlags_t flags)
217 char recvBuffer[COAP_MAX_PDU_SIZE];
221 struct sockaddr_storage srcAddr;
222 unsigned char *pktinfo = NULL;
223 struct msghdr msg = { 0 };
225 struct iovec iov = { recvBuffer, sizeof (recvBuffer) };
229 unsigned char data[CMSG_SPACE(sizeof (struct in6_pktinfo))];
234 msg.msg_namelen = sizeof (struct sockaddr_in6);
235 level = IPPROTO_IPV6;
237 len = sizeof (struct in6_pktinfo);
241 msg.msg_namelen = sizeof (struct sockaddr_in);
244 len = sizeof (struct in6_pktinfo);
247 msg.msg_name = &srcAddr;
250 msg.msg_control = &cmsg;
251 msg.msg_controllen = CMSG_SPACE(len);
253 ssize_t recvLen = recvmsg(fd, &msg, flags);
256 OIC_LOG_V(ERROR, TAG, "Recvfrom failed %s", strerror(errno));
257 return CA_STATUS_FAILED;
260 if (flags & CA_MULTICAST)
262 for (cmp = CMSG_FIRSTHDR(&msg); cmp != NULL; cmp = CMSG_NXTHDR(&msg, cmp))
264 if (cmp->cmsg_level == level && cmp->cmsg_type == type)
266 pktinfo = CMSG_DATA(cmp);
271 CASecureEndpoint_t sep = {.endpoint = {.adapter = CA_ADAPTER_IP, .flags = flags}};
275 sep.endpoint.interface = ((struct sockaddr_in6 *)&srcAddr)->sin6_scope_id;
276 ((struct sockaddr_in6 *)&srcAddr)->sin6_scope_id = 0;
278 if ((flags & CA_MULTICAST) && pktinfo)
280 struct in6_addr *addr = &(((struct in6_pktinfo *)pktinfo)->ipi6_addr);
281 unsigned char topbits = ((unsigned char *)addr)[0];
284 sep.endpoint.flags &= ~CA_MULTICAST;
290 if ((flags & CA_MULTICAST) && pktinfo)
292 struct in_addr *addr = &((struct in_pktinfo *)pktinfo)->ipi_addr;
293 uint32_t host = ntohl(addr->s_addr);
294 unsigned char topbits = ((unsigned char *)&host)[3];
295 if (topbits < 224 || topbits > 239)
297 sep.endpoint.flags &= ~CA_MULTICAST;
302 CAConvertAddrToName(&srcAddr, sep.endpoint.addr, &sep.endpoint.port);
304 if (flags & CA_SECURE)
307 int ret = CAAdapterNetDtlsDecrypt(&sep, (uint8_t *)recvBuffer, recvLen);
308 OIC_LOG_V(DEBUG, TAG, "CAAdapterNetDtlsDecrypt returns [%d]", ret);
310 OIC_LOG(ERROR, TAG, "Encrypted message but no DTLS");
315 if (g_packetReceivedCallback)
317 g_packetReceivedCallback(&sep, recvBuffer, recvLen);
326 OIC_LOG(DEBUG, TAG, "IN");
327 OIC_LOG(DEBUG, TAG, "OUT");
330 static int CACreateSocket(int family, uint16_t *port)
332 int socktype = SOCK_DGRAM;
334 socktype |= SOCK_CLOEXEC;
336 int fd = socket(family, socktype, IPPROTO_UDP);
339 OIC_LOG_V(ERROR, TAG, "create socket failed: %s", strerror(errno));
344 int fl = fcntl(fd, F_GETFD);
345 if (-1 == fl || -1 == fcntl(fd, F_SETFD, fl|FD_CLOEXEC))
347 OIC_LOG_V(ERROR, TAG, "set FD_CLOEXEC failed: %s", strerror(errno));
353 struct sockaddr_storage sa = { .ss_family = family };
356 if (family == AF_INET6)
360 if (-1 == setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof (on)))
362 OIC_LOG_V(ERROR, TAG, "IPV6_V6ONLY failed: %s", strerror(errno));
365 if (*port) // only do this for multicast ports
367 if (-1 == setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &on, sizeof (on)))
369 OIC_LOG_V(ERROR, TAG, "IPV6_RECVPKTINFO failed: %s", strerror(errno));
373 ((struct sockaddr_in6 *)&sa)->sin6_port = htons(*port);
374 socklen = sizeof (struct sockaddr_in6);
378 if (*port) // only do this for multicast ports
381 if (-1 == setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &on, sizeof (on)))
383 OIC_LOG_V(ERROR, TAG, "IP_PKTINFO failed: %s", strerror(errno));
387 ((struct sockaddr_in *)&sa)->sin_port = htons(*port);
388 socklen = sizeof (struct sockaddr_in);
391 if (*port) // use the given port
394 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof (on)))
396 OIC_LOG_V(ERROR, TAG, "SO_REUSEADDR failed: %s", strerror(errno));
402 if (-1 == bind(fd, (struct sockaddr *)&sa, socklen))
404 OIC_LOG_V(ERROR, TAG, "bind socket failed: %s", strerror(errno));
409 if (!*port) // return the assigned port
411 if (-1 == getsockname(fd, (struct sockaddr *)&sa, &socklen))
413 OIC_LOG_V(ERROR, TAG, "getsockname failed: %s", strerror(errno));
417 *port = ntohs(family == AF_INET6 ?
418 ((struct sockaddr_in6 *)&sa)->sin6_port :
419 ((struct sockaddr_in *)&sa)->sin_port);
425 #define CHECKFD(FD) \
426 if (FD > caglobals.ip.maxfd) \
427 caglobals.ip.maxfd = FD;
428 #define NEWSOCKET(FAMILY, NAME) \
429 caglobals.ip.NAME.fd = CACreateSocket(FAMILY, &caglobals.ip.NAME.port); \
430 CHECKFD(caglobals.ip.NAME.fd)
432 static void CAInitializeNetlink()
435 // create NETLINK fd for interface change notifications
436 struct sockaddr_nl sa = { AF_NETLINK, 0, 0, RTMGRP_LINK };
438 caglobals.ip.netlinkFd = socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE);
439 if (caglobals.ip.netlinkFd == -1)
441 OIC_LOG_V(ERROR, TAG, "netlink socket failed: %s", strerror(errno));
445 int r = bind(caglobals.ip.netlinkFd, (struct sockaddr *)&sa, sizeof (sa));
448 OIC_LOG_V(ERROR, TAG, "netlink bind failed: %s", strerror(errno));
449 close(caglobals.ip.netlinkFd);
450 caglobals.ip.netlinkFd = -1;
454 CHECKFD(caglobals.ip.netlinkFd);
460 static void CAInitializePipe()
462 caglobals.ip.selectTimeout = -1;
464 int ret = pipe2(caglobals.ip.shutdownFds, O_CLOEXEC);
466 int ret = pipe(caglobals.ip.shutdownFds);
469 ret = fcntl(caglobals.ip.shutdownFds[0], F_GETFD);
472 ret = fcntl(caglobals.ip.shutdownFds[0], F_SETFD, ret|FD_CLOEXEC);
476 ret = fcntl(caglobals.ip.shutdownFds[1], F_GETFD);
480 ret = fcntl(caglobals.ip.shutdownFds[1], F_SETFD, ret|FD_CLOEXEC);
484 close(caglobals.ip.shutdownFds[1]);
485 close(caglobals.ip.shutdownFds[0]);
486 caglobals.ip.shutdownFds[0] = -1;
487 caglobals.ip.shutdownFds[1] = -1;
493 OIC_LOG_V(ERROR, TAG, "pipe failed: %s", strerror(errno));
494 caglobals.ip.selectTimeout = SELECT_TIMEOUT; //poll needed for shutdown
498 CAResult_t CAIPStartServer(const ca_thread_pool_t threadPool)
500 CAResult_t res = CA_STATUS_OK;
502 if (caglobals.ip.started)
507 if (!IPv4MulticastAddress.s_addr)
509 (void)inet_aton(IPv4_MULTICAST, &IPv4MulticastAddress);
510 (void)inet_pton(AF_INET6, IPv6_MULTICAST_INT, &IPv6MulticastAddressInt);
511 (void)inet_pton(AF_INET6, IPv6_MULTICAST_LNK, &IPv6MulticastAddressLnk);
512 (void)inet_pton(AF_INET6, IPv6_MULTICAST_RLM, &IPv6MulticastAddressRlm);
513 (void)inet_pton(AF_INET6, IPv6_MULTICAST_ADM, &IPv6MulticastAddressAdm);
514 (void)inet_pton(AF_INET6, IPv6_MULTICAST_SIT, &IPv6MulticastAddressSit);
515 (void)inet_pton(AF_INET6, IPv6_MULTICAST_ORG, &IPv6MulticastAddressOrg);
516 (void)inet_pton(AF_INET6, IPv6_MULTICAST_GLB, &IPv6MulticastAddressGlb);
519 if (!caglobals.ip.ipv6enabled && !caglobals.ip.ipv4enabled)
521 caglobals.ip.ipv4enabled = true; // only needed to run CA tests
524 if (caglobals.ip.ipv6enabled)
526 NEWSOCKET(AF_INET6, u6)
527 NEWSOCKET(AF_INET6, u6s)
528 NEWSOCKET(AF_INET6, m6)
529 NEWSOCKET(AF_INET6, m6s)
530 OIC_LOG_V(INFO, TAG, "IPv6 unicast port: %u", caglobals.ip.u6.port);
532 if (caglobals.ip.ipv4enabled)
534 NEWSOCKET(AF_INET, u4)
535 NEWSOCKET(AF_INET, u4s)
536 NEWSOCKET(AF_INET, m4)
537 NEWSOCKET(AF_INET, m4s)
538 OIC_LOG_V(INFO, TAG, "IPv4 unicast port: %u", caglobals.ip.u4.port);
541 OIC_LOG_V(DEBUG, TAG,
542 "socket summary: u6=%d, u6s=%d, u4=%d, u4s=%d, m6=%d, m6s=%d, m4=%d, m4s=%d",
543 caglobals.ip.u6.fd, caglobals.ip.u6s.fd, caglobals.ip.u4.fd, caglobals.ip.u4s.fd,
544 caglobals.ip.m6.fd, caglobals.ip.m6s.fd, caglobals.ip.m4.fd, caglobals.ip.m4s.fd);
546 OIC_LOG_V(DEBUG, TAG,
547 "port summary: u6 port=%d, u6s port=%d, u4 port=%d, u4s port=%d, m6 port=%d,"
548 "m6s port=%d, m4 port=%d, m4s port=%d",
549 caglobals.ip.u6.port, caglobals.ip.u6s.port, caglobals.ip.u4.port,
550 caglobals.ip.u4s.port, caglobals.ip.m6.port, caglobals.ip.m6s.port,
551 caglobals.ip.m4.port, caglobals.ip.m4s.port);
552 // create pipe for fast shutdown
554 CHECKFD(caglobals.ip.shutdownFds[0]);
555 CHECKFD(caglobals.ip.shutdownFds[1]);
557 // create source of network interface change notifications
558 CAInitializeNetlink();
560 caglobals.ip.selectTimeout = CAGetPollingInterval(caglobals.ip.selectTimeout);
562 res = CAIPStartListenServer();
563 if (CA_STATUS_OK != res)
565 OIC_LOG_V(ERROR, TAG, "Failed to start listening server![%d]", res);
569 caglobals.ip.terminate = false;
570 res = ca_thread_pool_add_task(threadPool, CAReceiveHandler, NULL);
571 if (CA_STATUS_OK != res)
573 OIC_LOG(ERROR, TAG, "thread_pool_add_task failed");
576 OIC_LOG(DEBUG, TAG, "CAReceiveHandler thread started successfully.");
578 caglobals.ip.started = true;
582 void CAIPStopServer()
584 OIC_LOG(DEBUG, TAG, "IN");
586 caglobals.ip.started = false;
587 caglobals.ip.terminate = true;
589 if (caglobals.ip.shutdownFds[1] != -1)
591 close(caglobals.ip.shutdownFds[1]);
592 // receive thread will stop immediately
596 // receive thread will stop in SELECT_TIMEOUT seconds.
599 OIC_LOG(DEBUG, TAG, "OUT");
602 void CAWakeUpForChange()
604 if (caglobals.ip.shutdownFds[1] != -1)
609 len = write(caglobals.ip.shutdownFds[1], "w", 1);
610 } 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 void applyMulticastToInterface4(struct in_addr inaddr)
620 if (!caglobals.ip.ipv4enabled)
625 struct ip_mreq mreq = { .imr_multiaddr = IPv4MulticastAddress,
626 .imr_interface = inaddr};
627 if (setsockopt(caglobals.ip.m4.fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof (mreq)))
629 if (EADDRINUSE != errno)
631 OIC_LOG_V(ERROR, TAG, "IPv4 IP_ADD_MEMBERSHIP failed: %s", strerror(errno));
634 if (setsockopt(caglobals.ip.m4s.fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof (mreq)))
636 if (EADDRINUSE != errno)
638 OIC_LOG_V(ERROR, TAG, "secure IPv4 IP_ADD_MEMBERSHIP failed: %s", strerror(errno));
643 static void applyMulticast6(int fd, struct in6_addr *addr, uint32_t interface)
645 struct ipv6_mreq mreq;
646 mreq.ipv6mr_multiaddr = *addr;
647 mreq.ipv6mr_interface = interface;
648 if (setsockopt(fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq, sizeof (mreq)))
650 if (EADDRINUSE != errno)
652 OIC_LOG_V(ERROR, TAG, "IPv6 IP_ADD_MEMBERSHIP failed: %s", strerror(errno));
657 static void applyMulticastToInterface6(uint32_t interface)
659 if (!caglobals.ip.ipv6enabled)
663 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressInt, interface);
664 applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressLnk, interface);
665 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressRlm, interface);
666 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressAdm, interface);
667 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressSit, interface);
668 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressOrg, interface);
669 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressGlb, interface);
670 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressInt, interface);
671 applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressLnk, interface);
672 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressRlm, interface);
673 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressAdm, interface);
674 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressSit, interface);
675 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressOrg, interface);
676 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressGlb, interface);
679 CAResult_t CAIPStartListenServer()
681 u_arraylist_t *iflist = CAIPGetInterfaceInformation(0);
684 OIC_LOG_V(ERROR, TAG, "get interface info failed: %s", strerror(errno));
685 return CA_STATUS_FAILED;
688 uint32_t len = u_arraylist_length(iflist);
689 OIC_LOG_V(DEBUG, TAG, "IP network interfaces found: %d", len);
691 for (uint32_t i = 0; i < len; i++)
693 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
699 if ((ifitem->flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
703 if (ifitem->family == AF_INET)
705 struct in_addr inaddr;
706 inaddr.s_addr = ifitem->ipv4addr;
707 applyMulticastToInterface4(inaddr);
708 OIC_LOG_V(DEBUG, TAG, "IPv4 network interface: %s", ifitem->name);
710 if (ifitem->family == AF_INET6)
712 applyMulticastToInterface6(ifitem->index);
713 OIC_LOG_V(DEBUG, TAG, "IPv6 network interface: %s", ifitem->name);
717 u_arraylist_destroy(iflist);
721 CAResult_t CAIPStopListenServer()
723 u_arraylist_t *iflist = CAIPGetInterfaceInformation(0);
726 OIC_LOG_V(ERROR, TAG, "Get interface info failed: %s", strerror(errno));
727 return CA_STATUS_FAILED;
730 uint32_t len = u_arraylist_length(iflist);
731 OIC_LOG_V(DEBUG, TAG, "IP network interfaces found: %d", len);
733 for (uint32_t i = 0; i < len; i++)
735 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
742 if ((ifitem->flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
746 if (ifitem->family == AF_INET)
748 close(caglobals.ip.m4.fd);
749 close(caglobals.ip.m4s.fd);
750 caglobals.ip.m4.fd = -1;
751 caglobals.ip.m4s.fd = -1;
752 OIC_LOG_V(DEBUG, TAG, "IPv4 network interface: %s cloed", ifitem->name);
754 if (ifitem->family == AF_INET6)
756 close(caglobals.ip.m6.fd);
757 close(caglobals.ip.m6s.fd);
758 caglobals.ip.m6.fd = -1;
759 caglobals.ip.m6s.fd = -1;
760 OIC_LOG_V(DEBUG, TAG, "IPv6 network interface: %s", ifitem->name);
763 u_arraylist_destroy(iflist);
767 static void CAProcessNewInterface(CAInterface_t *ifitem)
769 applyMulticastToInterface6(ifitem->index);
770 struct in_addr inaddr;
771 inaddr.s_addr = ifitem->ipv4addr;
772 applyMulticastToInterface4(inaddr);
774 static void CAHandleNetlink()
779 struct sockaddr_nl sa;
780 struct iovec iov = { buf, sizeof (buf) };
781 struct msghdr msg = { (void *)&sa, sizeof (sa), &iov, 1, NULL, 0, 0 };
783 size_t len = recvmsg(caglobals.ip.netlinkFd, &msg, 0);
785 for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len); nh = NLMSG_NEXT(nh, len))
787 if (nh->nlmsg_type != RTM_NEWLINK)
792 struct ifinfomsg *ifi = (struct ifinfomsg *)NLMSG_DATA(nh);
793 if (!ifi || (ifi->ifi_flags & IFF_LOOPBACK) || !(ifi->ifi_flags & IFF_RUNNING))
798 int newIndex = ifi->ifi_index;
800 u_arraylist_t *iflist = CAIPGetInterfaceInformation(newIndex);
803 OIC_LOG_V(ERROR, TAG, "get interface info failed: %s", strerror(errno));
807 uint32_t listLength = u_arraylist_length(iflist);
808 for (uint32_t i = 0; i < listLength; i++)
810 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
816 if ((int)ifitem->index != newIndex)
821 CAProcessNewInterface(ifitem);
822 break; // we found the one we were looking for
824 u_arraylist_destroy(iflist);
829 void CAIPSetPacketReceiveCallback(CAIPPacketReceivedCallback callback)
831 OIC_LOG(DEBUG, TAG, "IN");
833 g_packetReceivedCallback = callback;
835 OIC_LOG(DEBUG, TAG, "OUT");
838 void CAIPSetExceptionCallback(CAIPExceptionCallback callback)
840 OIC_LOG(DEBUG, TAG, "IN");
842 g_exceptionCallback = callback;
844 OIC_LOG(DEBUG, TAG, "OUT");
847 static void sendData(int fd, const CAEndpoint_t *endpoint,
848 const void *data, uint32_t dlen,
849 const char *cast, const char *fam)
851 OIC_LOG(DEBUG, TAG, "IN");
853 char *secure = (endpoint->flags & CA_SECURE) ? "secure " : "";
854 (void)secure; // eliminates release warning
855 struct sockaddr_storage sock;
856 CAConvertNameToAddr(endpoint->addr, endpoint->port, &sock);
859 if (sock.ss_family == AF_INET6)
861 struct sockaddr_in6 *sock6 = (struct sockaddr_in6 *)&sock;
862 if (!sock6->sin6_scope_id)
864 sock6->sin6_scope_id = endpoint->interface;
866 socklen = sizeof(struct sockaddr_in6);
870 socklen = sizeof(struct sockaddr_in);
873 ssize_t len = sendto(fd, data, dlen, 0, (struct sockaddr *)&sock, socklen);
876 // If logging is not defined/enabled.
879 OIC_LOG_V(ERROR, TAG, "%s%s %s sendTo failed: %s", secure, cast, fam, strerror(errno));
883 OIC_LOG_V(INFO, TAG, "%s%s %s sendTo is successful: %ld bytes", secure, cast, fam, len);
887 static void sendMulticastData6(const u_arraylist_t *iflist,
888 CAEndpoint_t *endpoint,
889 const void *data, uint32_t datalen)
891 int scope = endpoint->flags & CA_SCOPE_MASK;
892 char *ipv6mcname = ipv6mcnames[scope];
895 OIC_LOG_V(INFO, TAG, "IPv6 multicast scope invalid: %d", scope);
898 OICStrcpy(endpoint->addr, sizeof(endpoint->addr), ipv6mcname);
899 int fd = caglobals.ip.u6.fd;
901 uint32_t len = u_arraylist_length(iflist);
902 for (uint32_t i = 0; i < len; i++)
904 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
909 if ((ifitem->flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
913 if (ifitem->family != AF_INET6)
918 int index = ifitem->index;
919 if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_IF, &index, sizeof (index)))
921 OIC_LOG_V(ERROR, TAG, "setsockopt6 failed: %s", strerror(errno));
924 sendData(fd, endpoint, data, datalen, "multicast", "ipv6");
928 static void sendMulticastData4(const u_arraylist_t *iflist,
929 CAEndpoint_t *endpoint,
930 const void *data, uint32_t datalen)
932 struct ip_mreq mreq = { .imr_multiaddr = IPv4MulticastAddress };
933 OICStrcpy(endpoint->addr, sizeof(endpoint->addr), IPv4_MULTICAST);
934 int fd = caglobals.ip.u4.fd;
936 uint32_t len = u_arraylist_length(iflist);
937 for (uint32_t i = 0; i < len; i++)
939 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
944 if ((ifitem->flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
948 if (ifitem->family != AF_INET)
953 struct in_addr inaddr;
954 inaddr.s_addr = ifitem->ipv4addr;
955 mreq.imr_interface = inaddr;
956 if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF, &mreq, sizeof (mreq)))
958 OIC_LOG_V(ERROR, TAG, "send IP_MULTICAST_IF failed: %s (using defualt)",
961 sendData(fd, endpoint, data, datalen, "multicast", "ipv4");
965 void CAIPSendData(CAEndpoint_t *endpoint, const void *data, uint32_t datalen,
968 VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint is NULL");
969 VERIFY_NON_NULL_VOID(data, TAG, "data is NULL");
971 bool isSecure = (endpoint->flags & CA_SECURE) != 0;
975 endpoint->port = isSecure ? CA_SECURE_COAP : CA_COAP;
977 u_arraylist_t *iflist = CAIPGetInterfaceInformation(0);
980 OIC_LOG_V(ERROR, TAG, "get interface info failed: %s", strerror(errno));
984 if ((endpoint->flags & CA_IPV6) && caglobals.ip.ipv6enabled)
986 sendMulticastData6(iflist, endpoint, data, datalen);
988 if ((endpoint->flags & CA_IPV4) && caglobals.ip.ipv4enabled)
990 sendMulticastData4(iflist, endpoint, data, datalen);
993 u_arraylist_destroy(iflist);
997 if (!endpoint->port) // unicast discovery
999 endpoint->port = isSecure ? CA_SECURE_COAP : CA_COAP;
1003 if (caglobals.ip.ipv6enabled && (endpoint->flags & CA_IPV6))
1005 fd = isSecure ? caglobals.ip.u6s.fd : caglobals.ip.u6.fd;
1006 #ifndef __WITH_DTLS__
1007 fd = caglobals.ip.u6.fd;
1009 sendData(fd, endpoint, data, datalen, "unicast", "ipv6");
1011 if (caglobals.ip.ipv4enabled && (endpoint->flags & CA_IPV4))
1013 fd = isSecure ? caglobals.ip.u4s.fd : caglobals.ip.u4.fd;
1014 #ifndef __WITH_DTLS__
1015 fd = caglobals.ip.u4.fd;
1017 sendData(fd, endpoint, data, datalen, "unicast", "ipv4");
1022 CAResult_t CAGetIPInterfaceInformation(CAEndpoint_t **info, uint32_t *size)
1024 OIC_LOG(DEBUG, TAG, "IN");
1026 VERIFY_NON_NULL(info, TAG, "info is NULL");
1027 VERIFY_NON_NULL(size, TAG, "size is NULL");
1029 u_arraylist_t *iflist = CAIPGetInterfaceInformation(0);
1032 OIC_LOG_V(ERROR, TAG, "get interface info failed: %s", strerror(errno));
1033 return CA_STATUS_FAILED;
1036 uint32_t len = u_arraylist_length(iflist);
1037 uint32_t length = len;
1039 #ifdef __WITH_DTLS__
1040 //If DTLS is supported, each interface can support secure port as well
1044 CAEndpoint_t *eps = (CAEndpoint_t *)OICCalloc(length, sizeof (CAEndpoint_t));
1047 OIC_LOG(ERROR, TAG, "Malloc Failed");
1048 u_arraylist_destroy(iflist);
1049 return CA_MEMORY_ALLOC_FAILED;
1052 for (uint32_t i = 0, j = 0; i < len; i++)
1054 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
1060 eps[j].adapter = CA_ADAPTER_IP;
1061 eps[j].interface = 0;
1063 if (ifitem->family == AF_INET6)
1065 eps[j].flags = CA_IPV6;
1066 eps[j].port = caglobals.ip.u6.port;
1070 eps[j].flags = CA_IPV4;
1071 eps[j].port = caglobals.ip.u4.port;
1073 unsigned char *addr= (unsigned char *) &(ifitem->ipv4addr);
1074 snprintf(eps[j].addr, MAX_ADDR_STR_SIZE_CA, "%d.%d.%d.%d",
1075 addr[0], addr[1], addr[2], addr[3]);
1078 #ifdef __WITH_DTLS__
1081 eps[j].adapter = CA_ADAPTER_IP;
1082 eps[j].interface = 0;
1084 if (ifitem->family == AF_INET6)
1086 eps[j].flags = CA_IPV6 | CA_SECURE;
1087 eps[j].port = caglobals.ip.u6s.port;
1091 eps[j].flags = CA_IPV4 | CA_SECURE;
1092 eps[j].port = caglobals.ip.u4s.port;
1094 unsigned char *addr= (unsigned char *) &(ifitem->ipv4addr);
1095 snprintf(eps[j].addr, MAX_ADDR_STR_SIZE_CA, "%d.%d.%d.%d",
1096 addr[0], addr[1], addr[2], addr[3]);
1105 u_arraylist_destroy(iflist);
1107 OIC_LOG(DEBUG, TAG, "OUT");
1108 return CA_STATUS_OK;