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"
51 * Logging tag for module name
53 #define TAG "IP_SERVER"
55 #define SELECT_TIMEOUT 1 // select() seconds (and termination latency)
57 #define IPv4_MULTICAST "224.0.1.187"
58 static struct in_addr IPv4MulticastAddress = { 0 };
60 #define IPv6_DOMAINS 16
61 #define IPv6_MULTICAST_INT "ff01::fd"
62 static struct in6_addr IPv6MulticastAddressInt;
63 #define IPv6_MULTICAST_LNK "ff02::fd"
64 static struct in6_addr IPv6MulticastAddressLnk;
65 #define IPv6_MULTICAST_RLM "ff03::fd"
66 static struct in6_addr IPv6MulticastAddressRlm;
67 #define IPv6_MULTICAST_ADM "ff04::fd"
68 static struct in6_addr IPv6MulticastAddressAdm;
69 #define IPv6_MULTICAST_SIT "ff05::fd"
70 static struct in6_addr IPv6MulticastAddressSit;
71 #define IPv6_MULTICAST_ORG "ff08::fd"
72 static struct in6_addr IPv6MulticastAddressOrg;
73 #define IPv6_MULTICAST_GLB "ff0e::fd"
74 static struct in6_addr IPv6MulticastAddressGlb;
76 static char *ipv6mcnames[IPv6_DOMAINS] = {
95 static CAIPExceptionCallback g_exceptionCallback;
97 static CAIPPacketReceivedCallback g_packetReceivedCallback;
99 static void CAHandleNetlink();
100 static void CAFindReadyMessage();
101 static void CASelectReturned(fd_set *readFds, int ret);
102 static void CAProcessNewInterface(CAInterface_t *ifchanged);
103 static CAResult_t CAReceiveMessage(int fd, CATransportFlags_t flags);
105 #define SET(TYPE, FDS) \
106 if (caglobals.ip.TYPE.fd != -1) \
108 FD_SET(caglobals.ip.TYPE.fd, FDS); \
111 #define ISSET(TYPE, FDS, FLAGS) \
112 if (caglobals.ip.TYPE.fd != -1 && FD_ISSET(caglobals.ip.TYPE.fd, FDS)) \
114 fd = caglobals.ip.TYPE.fd; \
118 static void CAReceiveHandler(void *data)
121 OIC_LOG(DEBUG, TAG, "IN");
122 while (!caglobals.ip.terminate)
124 CAFindReadyMessage();
127 OIC_LOG(DEBUG, TAG, "OUT");
130 static void CAFindReadyMessage()
133 struct timeval timeout;
135 timeout.tv_sec = caglobals.ip.selectTimeout;
137 struct timeval *tv = caglobals.ip.selectTimeout == -1 ? NULL : &timeout;
148 if (caglobals.ip.shutdownFds[0] != -1)
150 FD_SET(caglobals.ip.shutdownFds[0], &readFds);
152 if (caglobals.ip.netlinkFd != -1)
154 FD_SET(caglobals.ip.netlinkFd, &readFds);
157 int ret = select(caglobals.ip.maxfd + 1, &readFds, NULL, NULL, tv);
159 if (caglobals.ip.terminate)
161 OIC_LOG_V(DEBUG, TAG, "Packet receiver Stop request received.");
168 OIC_LOG_V(FATAL, TAG, "select error %s", strerror(errno));
173 CASelectReturned(&readFds, ret);
176 static void CASelectReturned(fd_set *readFds, int ret)
180 CATransportFlags_t flags = CA_DEFAULT_FLAGS;
182 while (!caglobals.ip.terminate)
184 ISSET(u6, readFds, CA_IPV6)
185 else ISSET(u6s, readFds, CA_IPV6 | CA_SECURE)
186 else ISSET(u4, readFds, CA_IPV4)
187 else ISSET(u4s, readFds, CA_IPV4 | CA_SECURE)
188 else ISSET(m6, readFds, CA_MULTICAST | CA_IPV6)
189 else ISSET(m6s, readFds, CA_MULTICAST | CA_IPV6 | CA_SECURE)
190 else ISSET(m4, readFds, CA_MULTICAST | CA_IPV4)
191 else ISSET(m4s, readFds, CA_MULTICAST | CA_IPV4 | CA_SECURE)
192 else if (FD_ISSET(caglobals.ip.netlinkFd, readFds))
197 else if (FD_ISSET(caglobals.ip.shutdownFds[0], readFds))
200 (void)read(caglobals.ip.shutdownFds[0], buf, sizeof (buf));
201 CAInterface_t *ifchanged = CAFindInterfaceChange();
204 CAProcessNewInterface(ifchanged);
214 (void)CAReceiveMessage(fd, flags);
219 static CAResult_t CAReceiveMessage(int fd, CATransportFlags_t flags)
221 char recvBuffer[COAP_MAX_PDU_SIZE];
225 struct sockaddr_storage srcAddr;
226 unsigned char *pktinfo = NULL;
227 struct msghdr msg = { 0 };
229 struct iovec iov = { recvBuffer, sizeof (recvBuffer) };
233 unsigned char data[CMSG_SPACE(sizeof (struct in6_pktinfo))];
238 msg.msg_namelen = sizeof (struct sockaddr_in6);
239 level = IPPROTO_IPV6;
241 len = sizeof (struct in6_pktinfo);
245 msg.msg_namelen = sizeof (struct sockaddr_in);
248 len = sizeof (struct in6_pktinfo);
251 msg.msg_name = &srcAddr;
254 msg.msg_control = &cmsg;
255 msg.msg_controllen = CMSG_SPACE(len);
257 ssize_t recvLen = recvmsg(fd, &msg, flags);
260 OIC_LOG_V(ERROR, TAG, "Recvfrom failed %s", strerror(errno));
261 return CA_STATUS_FAILED;
264 if (flags & CA_MULTICAST)
266 for (cmp = CMSG_FIRSTHDR(&msg); cmp != NULL; cmp = CMSG_NXTHDR(&msg, cmp))
268 if (cmp->cmsg_level == level && cmp->cmsg_type == type)
270 pktinfo = CMSG_DATA(cmp);
275 CASecureEndpoint_t sep = {.endpoint = {.adapter = CA_ADAPTER_IP, .flags = flags}};
279 sep.endpoint.interface = ((struct sockaddr_in6 *)&srcAddr)->sin6_scope_id;
280 ((struct sockaddr_in6 *)&srcAddr)->sin6_scope_id = 0;
282 if ((flags & CA_MULTICAST) && pktinfo)
284 struct in6_addr *addr = &(((struct in6_pktinfo *)pktinfo)->ipi6_addr);
285 unsigned char topbits = ((unsigned char *)addr)[0];
288 sep.endpoint.flags &= ~CA_MULTICAST;
294 if ((flags & CA_MULTICAST) && pktinfo)
296 struct in_addr *addr = &((struct in_pktinfo *)pktinfo)->ipi_addr;
297 uint32_t host = ntohl(addr->s_addr);
298 unsigned char topbits = ((unsigned char *)&host)[3];
299 if (topbits < 224 || topbits > 239)
301 sep.endpoint.flags &= ~CA_MULTICAST;
306 CAConvertAddrToName(&srcAddr, msg.msg_namelen, sep.endpoint.addr, &sep.endpoint.port);
308 if (flags & CA_SECURE)
311 int ret = CAAdapterNetDtlsDecrypt(&sep, (uint8_t *)recvBuffer, recvLen);
312 OIC_LOG_V(DEBUG, TAG, "CAAdapterNetDtlsDecrypt returns [%d]", ret);
314 OIC_LOG(ERROR, TAG, "Encrypted message but no DTLS");
319 if (g_packetReceivedCallback)
321 g_packetReceivedCallback(&sep, recvBuffer, recvLen);
330 OIC_LOG(DEBUG, TAG, "IN");
331 OIC_LOG(DEBUG, TAG, "OUT");
334 static int CACreateSocket(int family, uint16_t *port)
336 int socktype = SOCK_DGRAM;
338 socktype |= SOCK_CLOEXEC;
340 int fd = socket(family, socktype, IPPROTO_UDP);
343 OIC_LOG_V(ERROR, TAG, "create socket failed: %s", strerror(errno));
348 int fl = fcntl(fd, F_GETFD);
349 if (-1 == fl || -1 == fcntl(fd, F_SETFD, fl|FD_CLOEXEC))
351 OIC_LOG_V(ERROR, TAG, "set FD_CLOEXEC failed: %s", strerror(errno));
357 struct sockaddr_storage sa = { .ss_family = family };
360 if (family == AF_INET6)
364 if (-1 == setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof (on)))
366 OIC_LOG_V(ERROR, TAG, "IPV6_V6ONLY failed: %s", strerror(errno));
369 if (*port) // only do this for multicast ports
371 if (-1 == setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &on, sizeof (on)))
373 OIC_LOG_V(ERROR, TAG, "IPV6_RECVPKTINFO failed: %s", strerror(errno));
377 ((struct sockaddr_in6 *)&sa)->sin6_port = htons(*port);
378 socklen = sizeof (struct sockaddr_in6);
382 if (*port) // only do this for multicast ports
385 if (-1 == setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &on, sizeof (on)))
387 OIC_LOG_V(ERROR, TAG, "IP_PKTINFO failed: %s", strerror(errno));
391 ((struct sockaddr_in *)&sa)->sin_port = htons(*port);
392 socklen = sizeof (struct sockaddr_in);
395 if (*port) // use the given port
398 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof (on)))
400 OIC_LOG_V(ERROR, TAG, "SO_REUSEADDR failed: %s", strerror(errno));
406 if (-1 == bind(fd, (struct sockaddr *)&sa, socklen))
408 OIC_LOG_V(ERROR, TAG, "bind socket failed: %s", strerror(errno));
413 if (!*port) // return the assigned port
415 if (-1 == getsockname(fd, (struct sockaddr *)&sa, &socklen))
417 OIC_LOG_V(ERROR, TAG, "getsockname failed: %s", strerror(errno));
421 *port = ntohs(family == AF_INET6 ?
422 ((struct sockaddr_in6 *)&sa)->sin6_port :
423 ((struct sockaddr_in *)&sa)->sin_port);
429 #define CHECKFD(FD) \
430 if (FD > caglobals.ip.maxfd) \
431 caglobals.ip.maxfd = FD;
432 #define NEWSOCKET(FAMILY, NAME) \
433 caglobals.ip.NAME.fd = CACreateSocket(FAMILY, &caglobals.ip.NAME.port); \
434 CHECKFD(caglobals.ip.NAME.fd)
436 static void CAInitializeNetlink()
439 // create NETLINK fd for interface change notifications
440 struct sockaddr_nl sa = { AF_NETLINK, 0, 0, RTMGRP_LINK };
442 caglobals.ip.netlinkFd = socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE);
443 if (caglobals.ip.netlinkFd == -1)
445 OIC_LOG_V(ERROR, TAG, "netlink socket failed: %s", strerror(errno));
449 int r = bind(caglobals.ip.netlinkFd, (struct sockaddr *)&sa, sizeof (sa));
452 OIC_LOG_V(ERROR, TAG, "netlink bind failed: %s", strerror(errno));
453 close(caglobals.ip.netlinkFd);
454 caglobals.ip.netlinkFd = -1;
458 CHECKFD(caglobals.ip.netlinkFd);
464 static void CAInitializePipe()
466 caglobals.ip.selectTimeout = -1;
468 int ret = pipe2(caglobals.ip.shutdownFds, O_CLOEXEC);
470 int ret = pipe(caglobals.ip.shutdownFds);
473 ret = fcntl(caglobals.ip.shutdownFds[0], F_GETFD);
476 ret = fcntl(caglobals.ip.shutdownFds[0], F_SETFD, ret|FD_CLOEXEC);
480 ret = fcntl(caglobals.ip.shutdownFds[1], F_GETFD);
484 ret = fcntl(caglobals.ip.shutdownFds[1], F_SETFD, ret|FD_CLOEXEC);
488 close(caglobals.ip.shutdownFds[1]);
489 close(caglobals.ip.shutdownFds[0]);
490 caglobals.ip.shutdownFds[0] = -1;
491 caglobals.ip.shutdownFds[1] = -1;
497 OIC_LOG_V(ERROR, TAG, "pipe failed: %s", strerror(errno));
498 caglobals.ip.selectTimeout = SELECT_TIMEOUT; //poll needed for shutdown
502 CAResult_t CAIPStartServer(const ca_thread_pool_t threadPool)
504 CAResult_t res = CA_STATUS_OK;
506 if (caglobals.ip.started)
511 if (!IPv4MulticastAddress.s_addr)
513 (void)inet_pton(AF_INET, IPv4_MULTICAST, &IPv4MulticastAddress);
514 (void)inet_pton(AF_INET6, IPv6_MULTICAST_INT, &IPv6MulticastAddressInt);
515 (void)inet_pton(AF_INET6, IPv6_MULTICAST_LNK, &IPv6MulticastAddressLnk);
516 (void)inet_pton(AF_INET6, IPv6_MULTICAST_RLM, &IPv6MulticastAddressRlm);
517 (void)inet_pton(AF_INET6, IPv6_MULTICAST_ADM, &IPv6MulticastAddressAdm);
518 (void)inet_pton(AF_INET6, IPv6_MULTICAST_SIT, &IPv6MulticastAddressSit);
519 (void)inet_pton(AF_INET6, IPv6_MULTICAST_ORG, &IPv6MulticastAddressOrg);
520 (void)inet_pton(AF_INET6, IPv6_MULTICAST_GLB, &IPv6MulticastAddressGlb);
523 if (!caglobals.ip.ipv6enabled && !caglobals.ip.ipv4enabled)
525 caglobals.ip.ipv4enabled = true; // only needed to run CA tests
528 if (caglobals.ip.ipv6enabled)
530 NEWSOCKET(AF_INET6, u6)
531 NEWSOCKET(AF_INET6, u6s)
532 NEWSOCKET(AF_INET6, m6)
533 NEWSOCKET(AF_INET6, m6s)
534 OIC_LOG_V(INFO, TAG, "IPv6 unicast port: %u", caglobals.ip.u6.port);
536 if (caglobals.ip.ipv4enabled)
538 NEWSOCKET(AF_INET, u4)
539 NEWSOCKET(AF_INET, u4s)
540 NEWSOCKET(AF_INET, m4)
541 NEWSOCKET(AF_INET, m4s)
542 OIC_LOG_V(INFO, TAG, "IPv4 unicast port: %u", caglobals.ip.u4.port);
545 OIC_LOG_V(DEBUG, TAG,
546 "socket summary: u6=%d, u6s=%d, u4=%d, u4s=%d, m6=%d, m6s=%d, m4=%d, m4s=%d",
547 caglobals.ip.u6.fd, caglobals.ip.u6s.fd, caglobals.ip.u4.fd, caglobals.ip.u4s.fd,
548 caglobals.ip.m6.fd, caglobals.ip.m6s.fd, caglobals.ip.m4.fd, caglobals.ip.m4s.fd);
550 OIC_LOG_V(DEBUG, TAG,
551 "port summary: u6 port=%d, u6s port=%d, u4 port=%d, u4s port=%d, m6 port=%d,"
552 "m6s port=%d, m4 port=%d, m4s port=%d",
553 caglobals.ip.u6.port, caglobals.ip.u6s.port, caglobals.ip.u4.port,
554 caglobals.ip.u4s.port, caglobals.ip.m6.port, caglobals.ip.m6s.port,
555 caglobals.ip.m4.port, caglobals.ip.m4s.port);
556 // create pipe for fast shutdown
558 CHECKFD(caglobals.ip.shutdownFds[0]);
559 CHECKFD(caglobals.ip.shutdownFds[1]);
561 // create source of network interface change notifications
562 CAInitializeNetlink();
564 caglobals.ip.selectTimeout = CAGetPollingInterval(caglobals.ip.selectTimeout);
566 res = CAIPStartListenServer();
567 if (CA_STATUS_OK != res)
569 OIC_LOG_V(ERROR, TAG, "Failed to start listening server![%d]", res);
573 caglobals.ip.terminate = false;
574 res = ca_thread_pool_add_task(threadPool, CAReceiveHandler, NULL);
575 if (CA_STATUS_OK != res)
577 OIC_LOG(ERROR, TAG, "thread_pool_add_task failed");
580 OIC_LOG(DEBUG, TAG, "CAReceiveHandler thread started successfully.");
582 caglobals.ip.started = true;
586 void CAIPStopServer()
588 OIC_LOG(DEBUG, TAG, "IN");
590 caglobals.ip.started = false;
591 caglobals.ip.terminate = true;
593 if (caglobals.ip.shutdownFds[1] != -1)
595 close(caglobals.ip.shutdownFds[1]);
596 // receive thread will stop immediately
600 // receive thread will stop in SELECT_TIMEOUT seconds.
603 OIC_LOG(DEBUG, TAG, "OUT");
606 void CAWakeUpForChange()
608 if (caglobals.ip.shutdownFds[1] != -1)
613 len = write(caglobals.ip.shutdownFds[1], "w", 1);
614 } while ((len == -1) && (errno == EINTR));
615 if ((len == -1) && (errno != EINTR) && (errno != EPIPE))
617 OIC_LOG_V(DEBUG, TAG, "write failed: %s", strerror(errno));
622 static void applyMulticastToInterface4(struct in_addr inaddr)
624 if (!caglobals.ip.ipv4enabled)
629 struct ip_mreqn mreq = { .imr_multiaddr = IPv4MulticastAddress,
630 .imr_address = inaddr,
632 if (setsockopt(caglobals.ip.m4.fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof (mreq)))
634 if (EADDRINUSE != errno)
636 OIC_LOG_V(ERROR, TAG, "IPv4 IP_ADD_MEMBERSHIP failed: %s", strerror(errno));
639 if (setsockopt(caglobals.ip.m4s.fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof (mreq)))
641 if (EADDRINUSE != errno)
643 OIC_LOG_V(ERROR, TAG, "secure IPv4 IP_ADD_MEMBERSHIP failed: %s", strerror(errno));
648 static void applyMulticast6(int fd, struct in6_addr *addr, uint32_t interface)
650 struct ipv6_mreq mreq = {.ipv6mr_multiaddr = *addr, .ipv6mr_interface = interface};
652 if (setsockopt(fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq, sizeof (mreq)))
654 if (EADDRINUSE != errno)
656 OIC_LOG_V(ERROR, TAG, "IPv6 IP_ADD_MEMBERSHIP failed: %s", strerror(errno));
661 static void applyMulticastToInterface6(uint32_t interface)
663 if (!caglobals.ip.ipv6enabled)
667 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressInt, interface);
668 applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressLnk, interface);
669 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressRlm, interface);
670 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressAdm, interface);
671 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressSit, interface);
672 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressOrg, interface);
673 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressGlb, interface);
675 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressInt, interface);
676 applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressLnk, interface);
677 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressRlm, interface);
678 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressAdm, interface);
679 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressSit, interface);
680 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressOrg, interface);
681 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressGlb, interface);
684 CAResult_t CAIPStartListenServer()
686 u_arraylist_t *iflist = CAIPGetInterfaceInformation(0);
689 OIC_LOG_V(ERROR, TAG, "get interface info failed: %s", strerror(errno));
690 return CA_STATUS_FAILED;
693 uint32_t len = u_arraylist_length(iflist);
694 OIC_LOG_V(DEBUG, TAG, "IP network interfaces found: %d", len);
696 for (uint32_t i = 0; i < len; i++)
698 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
704 if ((ifitem->flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
708 if (ifitem->family == AF_INET)
710 struct in_addr inaddr;
711 inaddr.s_addr = ifitem->ipv4addr;
712 applyMulticastToInterface4(inaddr);
713 OIC_LOG_V(DEBUG, TAG, "IPv4 network interface: %s", ifitem->name);
715 if (ifitem->family == AF_INET6)
717 applyMulticastToInterface6(ifitem->index);
718 OIC_LOG_V(DEBUG, TAG, "IPv6 network interface: %s", ifitem->name);
722 u_arraylist_destroy(iflist);
726 CAResult_t CAIPStopListenServer()
728 u_arraylist_t *iflist = CAIPGetInterfaceInformation(0);
731 OIC_LOG_V(ERROR, TAG, "Get interface info failed: %s", strerror(errno));
732 return CA_STATUS_FAILED;
735 uint32_t len = u_arraylist_length(iflist);
736 OIC_LOG_V(DEBUG, TAG, "IP network interfaces found: %d", len);
738 for (uint32_t i = 0; i < len; i++)
740 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
747 if ((ifitem->flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
751 if (ifitem->family == AF_INET)
753 close(caglobals.ip.m4.fd);
754 close(caglobals.ip.m4s.fd);
755 caglobals.ip.m4.fd = -1;
756 caglobals.ip.m4s.fd = -1;
757 OIC_LOG_V(DEBUG, TAG, "IPv4 network interface: %s cloed", ifitem->name);
759 if (ifitem->family == AF_INET6)
761 close(caglobals.ip.m6.fd);
762 close(caglobals.ip.m6s.fd);
763 caglobals.ip.m6.fd = -1;
764 caglobals.ip.m6s.fd = -1;
765 OIC_LOG_V(DEBUG, TAG, "IPv6 network interface: %s", ifitem->name);
768 u_arraylist_destroy(iflist);
772 static void CAProcessNewInterface(CAInterface_t *ifitem)
776 OIC_LOG(DEBUG, TAG, "ifitem is null");
780 applyMulticastToInterface6(ifitem->index);
781 struct in_addr inaddr = { .s_addr = ifitem->ipv4addr };
782 applyMulticastToInterface4(inaddr);
784 static void CAHandleNetlink()
789 struct sockaddr_nl sa;
790 struct iovec iov = { buf, sizeof (buf) };
791 struct msghdr msg = { (void *)&sa, sizeof (sa), &iov, 1, NULL, 0, 0 };
793 size_t len = recvmsg(caglobals.ip.netlinkFd, &msg, 0);
795 for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len); nh = NLMSG_NEXT(nh, len))
797 if (nh->nlmsg_type != RTM_NEWLINK)
802 struct ifinfomsg *ifi = (struct ifinfomsg *)NLMSG_DATA(nh);
803 if (!ifi || (ifi->ifi_flags & IFF_LOOPBACK) || !(ifi->ifi_flags & IFF_RUNNING))
808 int newIndex = ifi->ifi_index;
810 u_arraylist_t *iflist = CAIPGetInterfaceInformation(newIndex);
813 OIC_LOG_V(ERROR, TAG, "get interface info failed: %s", strerror(errno));
817 uint32_t listLength = u_arraylist_length(iflist);
818 for (uint32_t i = 0; i < listLength; i++)
820 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
826 if ((int)ifitem->index != newIndex)
831 CAProcessNewInterface(ifitem);
832 break; // we found the one we were looking for
834 u_arraylist_destroy(iflist);
839 void CAIPSetPacketReceiveCallback(CAIPPacketReceivedCallback callback)
841 OIC_LOG(DEBUG, TAG, "IN");
843 g_packetReceivedCallback = callback;
845 OIC_LOG(DEBUG, TAG, "OUT");
848 void CAIPSetExceptionCallback(CAIPExceptionCallback callback)
850 OIC_LOG(DEBUG, TAG, "IN");
852 g_exceptionCallback = callback;
854 OIC_LOG(DEBUG, TAG, "OUT");
857 static void sendData(int fd, const CAEndpoint_t *endpoint,
858 const void *data, uint32_t dlen,
859 const char *cast, const char *fam)
861 OIC_LOG(DEBUG, TAG, "IN");
865 OIC_LOG(DEBUG, TAG, "endpoint is null");
869 char *secure = (endpoint->flags & CA_SECURE) ? "secure " : "";
870 (void)secure; // eliminates release warning
871 struct sockaddr_storage sock;
872 CAConvertNameToAddr(endpoint->addr, endpoint->port, &sock);
875 if (sock.ss_family == AF_INET6)
877 struct sockaddr_in6 *sock6 = (struct sockaddr_in6 *)&sock;
878 if (!sock6->sin6_scope_id)
880 sock6->sin6_scope_id = endpoint->interface;
882 socklen = sizeof(struct sockaddr_in6);
886 socklen = sizeof(struct sockaddr_in);
889 ssize_t len = sendto(fd, data, dlen, 0, (struct sockaddr *)&sock, socklen);
892 // If logging is not defined/enabled.
895 OIC_LOG_V(ERROR, TAG, "%s%s %s sendTo failed: %s", secure, cast, fam, strerror(errno));
899 OIC_LOG_V(INFO, TAG, "%s%s %s sendTo is successful: %ld bytes", secure, cast, fam, len);
903 static void sendMulticastData6(const u_arraylist_t *iflist,
904 CAEndpoint_t *endpoint,
905 const void *data, uint32_t datalen)
909 OIC_LOG(DEBUG, TAG, "endpoint is null");
913 int scope = endpoint->flags & CA_SCOPE_MASK;
914 char *ipv6mcname = ipv6mcnames[scope];
917 OIC_LOG_V(INFO, TAG, "IPv6 multicast scope invalid: %d", scope);
920 OICStrcpy(endpoint->addr, sizeof(endpoint->addr), ipv6mcname);
921 int fd = caglobals.ip.u6.fd;
923 uint32_t len = u_arraylist_length(iflist);
924 for (uint32_t i = 0; i < len; i++)
926 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
931 if ((ifitem->flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
935 if (ifitem->family != AF_INET6)
940 int index = ifitem->index;
941 if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_IF, &index, sizeof (index)))
943 OIC_LOG_V(ERROR, TAG, "setsockopt6 failed: %s", strerror(errno));
946 sendData(fd, endpoint, data, datalen, "multicast", "ipv6");
950 static void sendMulticastData4(const u_arraylist_t *iflist,
951 CAEndpoint_t *endpoint,
952 const void *data, uint32_t datalen)
954 VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint is NULL");
956 struct ip_mreqn mreq = { .imr_multiaddr = IPv4MulticastAddress,
958 OICStrcpy(endpoint->addr, sizeof(endpoint->addr), IPv4_MULTICAST);
959 int fd = caglobals.ip.u4.fd;
961 uint32_t len = u_arraylist_length(iflist);
962 for (uint32_t i = 0; i < len; i++)
964 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
969 if ((ifitem->flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
973 if (ifitem->family != AF_INET)
978 struct in_addr inaddr;
979 inaddr.s_addr = ifitem->ipv4addr;
980 mreq.imr_address = inaddr;
981 if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF, &mreq, sizeof (mreq)))
983 OIC_LOG_V(ERROR, TAG, "send IP_MULTICAST_IF failed: %s (using defualt)",
986 sendData(fd, endpoint, data, datalen, "multicast", "ipv4");
990 void CAIPSendData(CAEndpoint_t *endpoint, const void *data, uint32_t datalen,
993 VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint is NULL");
994 VERIFY_NON_NULL_VOID(data, TAG, "data is NULL");
996 bool isSecure = (endpoint->flags & CA_SECURE) != 0;
1000 endpoint->port = isSecure ? CA_SECURE_COAP : CA_COAP;
1002 u_arraylist_t *iflist = CAIPGetInterfaceInformation(0);
1005 OIC_LOG_V(ERROR, TAG, "get interface info failed: %s", strerror(errno));
1009 if ((endpoint->flags & CA_IPV6) && caglobals.ip.ipv6enabled)
1011 sendMulticastData6(iflist, endpoint, data, datalen);
1013 if ((endpoint->flags & CA_IPV4) && caglobals.ip.ipv4enabled)
1015 sendMulticastData4(iflist, endpoint, data, datalen);
1018 u_arraylist_destroy(iflist);
1022 if (!endpoint->port) // unicast discovery
1024 endpoint->port = isSecure ? CA_SECURE_COAP : CA_COAP;
1028 if (caglobals.ip.ipv6enabled && (endpoint->flags & CA_IPV6))
1030 fd = isSecure ? caglobals.ip.u6s.fd : caglobals.ip.u6.fd;
1031 #ifndef __WITH_DTLS__
1032 fd = caglobals.ip.u6.fd;
1034 sendData(fd, endpoint, data, datalen, "unicast", "ipv6");
1036 if (caglobals.ip.ipv4enabled && (endpoint->flags & CA_IPV4))
1038 fd = isSecure ? caglobals.ip.u4s.fd : caglobals.ip.u4.fd;
1039 #ifndef __WITH_DTLS__
1040 fd = caglobals.ip.u4.fd;
1042 sendData(fd, endpoint, data, datalen, "unicast", "ipv4");
1047 CAResult_t CAGetIPInterfaceInformation(CAEndpoint_t **info, uint32_t *size)
1049 OIC_LOG(DEBUG, TAG, "IN");
1051 VERIFY_NON_NULL(info, TAG, "info is NULL");
1052 VERIFY_NON_NULL(size, TAG, "size is NULL");
1054 u_arraylist_t *iflist = CAIPGetInterfaceInformation(0);
1057 OIC_LOG_V(ERROR, TAG, "get interface info failed: %s", strerror(errno));
1058 return CA_STATUS_FAILED;
1061 uint32_t len = u_arraylist_length(iflist);
1062 uint32_t length = len;
1064 #ifdef __WITH_DTLS__
1065 //If DTLS is supported, each interface can support secure port as well
1069 CAEndpoint_t *eps = (CAEndpoint_t *)OICCalloc(length, sizeof (CAEndpoint_t));
1072 OIC_LOG(ERROR, TAG, "Malloc Failed");
1073 u_arraylist_destroy(iflist);
1074 return CA_MEMORY_ALLOC_FAILED;
1077 for (uint32_t i = 0, j = 0; i < len; i++)
1079 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
1085 eps[j].adapter = CA_ADAPTER_IP;
1086 eps[j].interface = 0;
1088 if (ifitem->family == AF_INET6)
1090 eps[j].flags = CA_IPV6;
1091 eps[j].port = caglobals.ip.u6.port;
1095 eps[j].flags = CA_IPV4;
1096 eps[j].port = caglobals.ip.u4.port;
1098 inet_ntop(AF_INET, &(ifitem->ipv4addr), eps[j].addr, MAX_ADDR_STR_SIZE_CA);
1101 #ifdef __WITH_DTLS__
1104 eps[j].adapter = CA_ADAPTER_IP;
1105 eps[j].interface = 0;
1107 if (ifitem->family == AF_INET6)
1109 eps[j].flags = CA_IPV6 | CA_SECURE;
1110 eps[j].port = caglobals.ip.u6s.port;
1114 eps[j].flags = CA_IPV4 | CA_SECURE;
1115 eps[j].port = caglobals.ip.u4s.port;
1116 inet_ntop(AF_INET, &(ifitem->ipv4addr), eps[j].addr, MAX_ADDR_STR_SIZE_CA);
1125 u_arraylist_destroy(iflist);
1127 OIC_LOG(DEBUG, TAG, "OUT");
1128 return CA_STATUS_OK;