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 #ifndef __APPLE_USE_RFC_3542
22 #define __APPLE_USE_RFC_3542 // for PKTINFO
25 #define _GNU_SOURCE // for in6_pktinfo
28 #include <sys/types.h>
29 #include <sys/socket.h>
32 #include <sys/types.h>
34 #include <sys/select.h>
35 #include <arpa/inet.h>
36 #include <netinet/in.h>
40 #include <linux/netlink.h>
41 #include <linux/rtnetlink.h>
45 #include "caipinterface.h"
46 #include "caadapterutils.h"
48 #include "caadapternetdtls.h"
51 #include "oic_malloc.h"
52 #include "oic_string.h"
55 * Logging tag for module name
57 #define TAG "OIC_CA_IP_SERVER"
59 #define SELECT_TIMEOUT 1 // select() seconds (and termination latency)
61 #define IPv4_MULTICAST "224.0.1.187"
62 static struct in_addr IPv4MulticastAddress = { 0 };
64 #define IPv6_DOMAINS 16
65 #define IPv6_MULTICAST_INT "ff01::fd"
66 static struct in6_addr IPv6MulticastAddressInt;
67 #define IPv6_MULTICAST_LNK "ff02::fd"
68 static struct in6_addr IPv6MulticastAddressLnk;
69 #define IPv6_MULTICAST_RLM "ff03::fd"
70 static struct in6_addr IPv6MulticastAddressRlm;
71 #define IPv6_MULTICAST_ADM "ff04::fd"
72 static struct in6_addr IPv6MulticastAddressAdm;
73 #define IPv6_MULTICAST_SIT "ff05::fd"
74 static struct in6_addr IPv6MulticastAddressSit;
75 #define IPv6_MULTICAST_ORG "ff08::fd"
76 static struct in6_addr IPv6MulticastAddressOrg;
77 #define IPv6_MULTICAST_GLB "ff0e::fd"
78 static struct in6_addr IPv6MulticastAddressGlb;
80 static char *ipv6mcnames[IPv6_DOMAINS] = {
99 static CAIPExceptionCallback g_exceptionCallback;
101 static CAIPPacketReceivedCallback g_packetReceivedCallback;
103 static void CAHandleNetlink();
104 static void CAFindReadyMessage();
105 static void CASelectReturned(fd_set *readFds, int ret);
106 static void CAProcessNewInterface(CAInterface_t *ifchanged);
107 static CAResult_t CAReceiveMessage(int fd, CATransportFlags_t flags);
109 #define SET(TYPE, FDS) \
110 if (caglobals.ip.TYPE.fd != -1) \
112 FD_SET(caglobals.ip.TYPE.fd, FDS); \
115 #define ISSET(TYPE, FDS, FLAGS) \
116 if (caglobals.ip.TYPE.fd != -1 && FD_ISSET(caglobals.ip.TYPE.fd, FDS)) \
118 fd = caglobals.ip.TYPE.fd; \
122 void CADeInitializeIPGlobals()
124 if (caglobals.ip.u6.fd != -1)
126 close(caglobals.ip.u6.fd);
127 caglobals.ip.u6.fd = -1;
130 if (caglobals.ip.u6s.fd != -1)
132 close(caglobals.ip.u6s.fd);
133 caglobals.ip.u6s.fd = -1;
136 if (caglobals.ip.u4.fd != -1)
138 close(caglobals.ip.u4.fd);
139 caglobals.ip.u4.fd = -1;
142 if (caglobals.ip.u4s.fd != -1)
144 close(caglobals.ip.u4s.fd);
145 caglobals.ip.u4s.fd = -1;
148 if (caglobals.ip.m6.fd != -1)
150 close(caglobals.ip.m6.fd);
151 caglobals.ip.m6.fd = -1;
154 if (caglobals.ip.m6s.fd != -1)
156 close(caglobals.ip.m6s.fd);
157 caglobals.ip.m6s.fd = -1;
160 if (caglobals.ip.m4.fd != -1)
162 close(caglobals.ip.m4.fd);
163 caglobals.ip.m4.fd = -1;
166 if (caglobals.ip.m4s.fd != -1)
168 close(caglobals.ip.m4s.fd);
169 caglobals.ip.m4s.fd = -1;
172 if (caglobals.ip.netlinkFd != -1)
174 close(caglobals.ip.netlinkFd);
175 caglobals.ip.netlinkFd = -1;
179 static void CAReceiveHandler(void *data)
183 while (!caglobals.ip.terminate)
185 CAFindReadyMessage();
189 static void CAFindReadyMessage()
192 struct timeval timeout;
194 timeout.tv_sec = caglobals.ip.selectTimeout;
196 struct timeval *tv = caglobals.ip.selectTimeout == -1 ? NULL : &timeout;
207 if (caglobals.ip.shutdownFds[0] != -1)
209 FD_SET(caglobals.ip.shutdownFds[0], &readFds);
211 if (caglobals.ip.netlinkFd != -1)
213 FD_SET(caglobals.ip.netlinkFd, &readFds);
216 int ret = select(caglobals.ip.maxfd + 1, &readFds, NULL, NULL, tv);
218 if (caglobals.ip.terminate)
220 OIC_LOG_V(DEBUG, TAG, "Packet receiver Stop request received.");
227 OIC_LOG_V(FATAL, TAG, "select error %s", strerror(errno));
232 CASelectReturned(&readFds, ret);
235 static void CASelectReturned(fd_set *readFds, int ret)
239 CATransportFlags_t flags = CA_DEFAULT_FLAGS;
241 while (!caglobals.ip.terminate)
243 ISSET(u6, readFds, CA_IPV6)
244 else ISSET(u6s, readFds, CA_IPV6 | CA_SECURE)
245 else ISSET(u4, readFds, CA_IPV4)
246 else ISSET(u4s, readFds, CA_IPV4 | CA_SECURE)
247 else ISSET(m6, readFds, CA_MULTICAST | CA_IPV6)
248 else ISSET(m6s, readFds, CA_MULTICAST | CA_IPV6 | CA_SECURE)
249 else ISSET(m4, readFds, CA_MULTICAST | CA_IPV4)
250 else ISSET(m4s, readFds, CA_MULTICAST | CA_IPV4 | CA_SECURE)
251 else if (FD_ISSET(caglobals.ip.netlinkFd, readFds))
253 CAInterface_t *ifchanged = CAFindInterfaceChange();
256 CAProcessNewInterface(ifchanged);
261 else if (FD_ISSET(caglobals.ip.shutdownFds[0], readFds))
264 ssize_t len = read(caglobals.ip.shutdownFds[0], buf, sizeof (buf));
276 (void)CAReceiveMessage(fd, flags);
281 static CAResult_t CAReceiveMessage(int fd, CATransportFlags_t flags)
283 char recvBuffer[COAP_MAX_PDU_SIZE];
286 int level, type, namelen;
287 struct sockaddr_storage srcAddr;
288 unsigned char *pktinfo = NULL;
289 struct cmsghdr *cmp = NULL;
290 struct iovec iov = { recvBuffer, sizeof (recvBuffer) };
294 unsigned char data[CMSG_SPACE(sizeof (struct in6_pktinfo))];
299 namelen = sizeof (struct sockaddr_in6);
300 level = IPPROTO_IPV6;
302 len = sizeof (struct in6_pktinfo);
306 namelen = sizeof (struct sockaddr_in);
309 len = sizeof (struct in6_pktinfo);
312 struct msghdr msg = { .msg_name = &srcAddr,
313 .msg_namelen = namelen,
316 .msg_control = &cmsg,
317 .msg_controllen = CMSG_SPACE(len) };
319 ssize_t recvLen = recvmsg(fd, &msg, flags);
322 OIC_LOG_V(ERROR, TAG, "Recvfrom failed %s", strerror(errno));
323 return CA_STATUS_FAILED;
326 if (flags & CA_MULTICAST)
328 for (cmp = CMSG_FIRSTHDR(&msg); cmp != NULL; cmp = CMSG_NXTHDR(&msg, cmp))
330 if (cmp->cmsg_level == level && cmp->cmsg_type == type)
332 pktinfo = CMSG_DATA(cmp);
337 CASecureEndpoint_t sep = {.endpoint = {.adapter = CA_ADAPTER_IP, .flags = flags}};
341 sep.endpoint.ifindex = ((struct sockaddr_in6 *)&srcAddr)->sin6_scope_id;
342 ((struct sockaddr_in6 *)&srcAddr)->sin6_scope_id = 0;
344 if ((flags & CA_MULTICAST) && pktinfo)
346 struct in6_addr *addr = &(((struct in6_pktinfo *)pktinfo)->ipi6_addr);
347 unsigned char topbits = ((unsigned char *)addr)[0];
350 sep.endpoint.flags &= ~CA_MULTICAST;
356 if ((flags & CA_MULTICAST) && pktinfo)
358 struct in_addr *addr = &((struct in_pktinfo *)pktinfo)->ipi_addr;
359 uint32_t host = ntohl(addr->s_addr);
360 unsigned char topbits = ((unsigned char *)&host)[3];
361 if (topbits < 224 || topbits > 239)
363 sep.endpoint.flags &= ~CA_MULTICAST;
368 CAConvertAddrToName(&srcAddr, msg.msg_namelen, sep.endpoint.addr, &sep.endpoint.port);
370 if (flags & CA_SECURE)
373 int ret = CAAdapterNetDtlsDecrypt(&sep, (uint8_t *)recvBuffer, recvLen);
374 OIC_LOG_V(DEBUG, TAG, "CAAdapterNetDtlsDecrypt returns [%d]", ret);
376 OIC_LOG(ERROR, TAG, "Encrypted message but no DTLS");
381 if (g_packetReceivedCallback)
383 g_packetReceivedCallback(&sep, recvBuffer, recvLen);
392 OIC_LOG(DEBUG, TAG, "IN");
393 OIC_LOG(DEBUG, TAG, "OUT");
396 static int CACreateSocket(int family, uint16_t *port)
398 int socktype = SOCK_DGRAM;
400 socktype |= SOCK_CLOEXEC;
402 int fd = socket(family, socktype, IPPROTO_UDP);
405 OIC_LOG_V(ERROR, TAG, "create socket failed: %s", strerror(errno));
410 int fl = fcntl(fd, F_GETFD);
411 if (-1 == fl || -1 == fcntl(fd, F_SETFD, fl|FD_CLOEXEC))
413 OIC_LOG_V(ERROR, TAG, "set FD_CLOEXEC failed: %s", strerror(errno));
419 struct sockaddr_storage sa = { .ss_family = family };
422 if (family == AF_INET6)
426 if (-1 == setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof (on)))
428 OIC_LOG_V(ERROR, TAG, "IPV6_V6ONLY failed: %s", strerror(errno));
431 if (*port) // only do this for multicast ports
433 if (-1 == setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &on, sizeof (on)))
435 OIC_LOG_V(ERROR, TAG, "IPV6_RECVPKTINFO failed: %s", strerror(errno));
439 ((struct sockaddr_in6 *)&sa)->sin6_port = htons(*port);
440 socklen = sizeof (struct sockaddr_in6);
444 if (*port) // only do this for multicast ports
447 if (-1 == setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &on, sizeof (on)))
449 OIC_LOG_V(ERROR, TAG, "IP_PKTINFO failed: %s", strerror(errno));
453 ((struct sockaddr_in *)&sa)->sin_port = htons(*port);
454 socklen = sizeof (struct sockaddr_in);
457 if (*port) // use the given port
460 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof (on)))
462 OIC_LOG_V(ERROR, TAG, "SO_REUSEADDR failed: %s", strerror(errno));
468 if (-1 == bind(fd, (struct sockaddr *)&sa, socklen))
470 OIC_LOG_V(ERROR, TAG, "bind socket failed: %s", strerror(errno));
475 if (!*port) // return the assigned port
477 if (-1 == getsockname(fd, (struct sockaddr *)&sa, &socklen))
479 OIC_LOG_V(ERROR, TAG, "getsockname failed: %s", strerror(errno));
483 *port = ntohs(family == AF_INET6 ?
484 ((struct sockaddr_in6 *)&sa)->sin6_port :
485 ((struct sockaddr_in *)&sa)->sin_port);
491 #define CHECKFD(FD) \
492 if (FD > caglobals.ip.maxfd) \
493 caglobals.ip.maxfd = FD;
494 #define NEWSOCKET(FAMILY, NAME) \
495 caglobals.ip.NAME.fd = CACreateSocket(FAMILY, &caglobals.ip.NAME.port); \
496 CHECKFD(caglobals.ip.NAME.fd)
498 static void CAInitializeNetlink()
501 // create NETLINK fd for interface change notifications
502 struct sockaddr_nl sa = { AF_NETLINK, 0, 0, RTMGRP_LINK };
504 caglobals.ip.netlinkFd = socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE);
505 if (caglobals.ip.netlinkFd == -1)
507 OIC_LOG_V(ERROR, TAG, "netlink socket failed: %s", strerror(errno));
511 int r = bind(caglobals.ip.netlinkFd, (struct sockaddr *)&sa, sizeof (sa));
514 OIC_LOG_V(ERROR, TAG, "netlink bind failed: %s", strerror(errno));
515 close(caglobals.ip.netlinkFd);
516 caglobals.ip.netlinkFd = -1;
520 CHECKFD(caglobals.ip.netlinkFd);
526 static void CAInitializePipe()
528 caglobals.ip.selectTimeout = -1;
530 int ret = pipe2(caglobals.ip.shutdownFds, O_CLOEXEC);
532 int ret = pipe(caglobals.ip.shutdownFds);
535 ret = fcntl(caglobals.ip.shutdownFds[0], F_GETFD);
538 ret = fcntl(caglobals.ip.shutdownFds[0], F_SETFD, ret|FD_CLOEXEC);
542 ret = fcntl(caglobals.ip.shutdownFds[1], F_GETFD);
546 ret = fcntl(caglobals.ip.shutdownFds[1], F_SETFD, ret|FD_CLOEXEC);
550 close(caglobals.ip.shutdownFds[1]);
551 close(caglobals.ip.shutdownFds[0]);
552 caglobals.ip.shutdownFds[0] = -1;
553 caglobals.ip.shutdownFds[1] = -1;
559 OIC_LOG_V(ERROR, TAG, "pipe failed: %s", strerror(errno));
560 caglobals.ip.selectTimeout = SELECT_TIMEOUT; //poll needed for shutdown
564 CAResult_t CAIPStartServer(const ca_thread_pool_t threadPool)
566 CAResult_t res = CA_STATUS_OK;
568 if (caglobals.ip.started)
573 if (!IPv4MulticastAddress.s_addr)
575 (void)inet_pton(AF_INET, IPv4_MULTICAST, &IPv4MulticastAddress);
576 (void)inet_pton(AF_INET6, IPv6_MULTICAST_INT, &IPv6MulticastAddressInt);
577 (void)inet_pton(AF_INET6, IPv6_MULTICAST_LNK, &IPv6MulticastAddressLnk);
578 (void)inet_pton(AF_INET6, IPv6_MULTICAST_RLM, &IPv6MulticastAddressRlm);
579 (void)inet_pton(AF_INET6, IPv6_MULTICAST_ADM, &IPv6MulticastAddressAdm);
580 (void)inet_pton(AF_INET6, IPv6_MULTICAST_SIT, &IPv6MulticastAddressSit);
581 (void)inet_pton(AF_INET6, IPv6_MULTICAST_ORG, &IPv6MulticastAddressOrg);
582 (void)inet_pton(AF_INET6, IPv6_MULTICAST_GLB, &IPv6MulticastAddressGlb);
585 if (!caglobals.ip.ipv6enabled && !caglobals.ip.ipv4enabled)
587 caglobals.ip.ipv4enabled = true; // only needed to run CA tests
590 if (caglobals.ip.ipv6enabled)
592 NEWSOCKET(AF_INET6, u6)
593 NEWSOCKET(AF_INET6, u6s)
594 NEWSOCKET(AF_INET6, m6)
595 NEWSOCKET(AF_INET6, m6s)
596 OIC_LOG_V(INFO, TAG, "IPv6 unicast port: %u", caglobals.ip.u6.port);
598 if (caglobals.ip.ipv4enabled)
600 NEWSOCKET(AF_INET, u4)
601 NEWSOCKET(AF_INET, u4s)
602 NEWSOCKET(AF_INET, m4)
603 NEWSOCKET(AF_INET, m4s)
604 OIC_LOG_V(INFO, TAG, "IPv4 unicast port: %u", caglobals.ip.u4.port);
607 OIC_LOG_V(DEBUG, TAG,
608 "socket summary: u6=%d, u6s=%d, u4=%d, u4s=%d, m6=%d, m6s=%d, m4=%d, m4s=%d",
609 caglobals.ip.u6.fd, caglobals.ip.u6s.fd, caglobals.ip.u4.fd, caglobals.ip.u4s.fd,
610 caglobals.ip.m6.fd, caglobals.ip.m6s.fd, caglobals.ip.m4.fd, caglobals.ip.m4s.fd);
612 OIC_LOG_V(DEBUG, TAG,
613 "port summary: u6 port=%d, u6s port=%d, u4 port=%d, u4s port=%d, m6 port=%d,"
614 "m6s port=%d, m4 port=%d, m4s port=%d",
615 caglobals.ip.u6.port, caglobals.ip.u6s.port, caglobals.ip.u4.port,
616 caglobals.ip.u4s.port, caglobals.ip.m6.port, caglobals.ip.m6s.port,
617 caglobals.ip.m4.port, caglobals.ip.m4s.port);
618 // create pipe for fast shutdown
620 CHECKFD(caglobals.ip.shutdownFds[0]);
621 CHECKFD(caglobals.ip.shutdownFds[1]);
623 // create source of network interface change notifications
624 CAInitializeNetlink();
626 caglobals.ip.selectTimeout = CAGetPollingInterval(caglobals.ip.selectTimeout);
628 res = CAIPStartListenServer();
629 if (CA_STATUS_OK != res)
631 OIC_LOG_V(ERROR, TAG, "Failed to start listening server![%d]", res);
635 caglobals.ip.terminate = false;
636 res = ca_thread_pool_add_task(threadPool, CAReceiveHandler, NULL);
637 if (CA_STATUS_OK != res)
639 OIC_LOG(ERROR, TAG, "thread_pool_add_task failed");
642 OIC_LOG(DEBUG, TAG, "CAReceiveHandler thread started successfully.");
644 caglobals.ip.started = true;
648 void CAIPStopServer()
650 caglobals.ip.started = false;
651 caglobals.ip.terminate = true;
653 if (caglobals.ip.shutdownFds[1] != -1)
655 close(caglobals.ip.shutdownFds[1]);
656 // receive thread will stop immediately
660 // receive thread will stop in SELECT_TIMEOUT seconds.
664 void CAWakeUpForChange()
666 if (caglobals.ip.shutdownFds[1] != -1)
671 len = write(caglobals.ip.shutdownFds[1], "w", 1);
672 } while ((len == -1) && (errno == EINTR));
673 if ((len == -1) && (errno != EINTR) && (errno != EPIPE))
675 OIC_LOG_V(DEBUG, TAG, "write failed: %s", strerror(errno));
680 static void applyMulticastToInterface4(struct in_addr inaddr)
682 if (!caglobals.ip.ipv4enabled)
687 struct ip_mreqn mreq = { .imr_multiaddr = IPv4MulticastAddress,
688 .imr_address = inaddr,
690 if (setsockopt(caglobals.ip.m4.fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof (mreq)))
692 if (EADDRINUSE != errno)
694 OIC_LOG_V(ERROR, TAG, "IPv4 IP_ADD_MEMBERSHIP failed: %s", strerror(errno));
697 if (setsockopt(caglobals.ip.m4s.fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof (mreq)))
699 if (EADDRINUSE != errno)
701 OIC_LOG_V(ERROR, TAG, "secure IPv4 IP_ADD_MEMBERSHIP failed: %s", strerror(errno));
706 static void applyMulticast6(int fd, struct in6_addr *addr, uint32_t ifindex)
708 struct ipv6_mreq mreq = {.ipv6mr_multiaddr = *addr, .ipv6mr_interface = ifindex};
709 if (setsockopt(fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq, sizeof (mreq)))
711 if (EADDRINUSE != errno)
713 OIC_LOG_V(ERROR, TAG, "IPv6 IP_ADD_MEMBERSHIP failed: %s", strerror(errno));
718 static void applyMulticastToInterface6(uint32_t ifindex)
720 if (!caglobals.ip.ipv6enabled)
724 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressInt, ifindex);
725 applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressLnk, ifindex);
726 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressRlm, ifindex);
727 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressAdm, ifindex);
728 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressSit, ifindex);
729 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressOrg, ifindex);
730 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressGlb, ifindex);
732 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressInt, ifindex);
733 applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressLnk, ifindex);
734 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressRlm, ifindex);
735 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressAdm, ifindex);
736 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressSit, ifindex);
737 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressOrg, ifindex);
738 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressGlb, ifindex);
741 CAResult_t CAIPStartListenServer()
743 u_arraylist_t *iflist = CAIPGetInterfaceInformation(0);
746 OIC_LOG_V(ERROR, TAG, "get interface info failed: %s", strerror(errno));
747 return CA_STATUS_FAILED;
750 uint32_t len = u_arraylist_length(iflist);
751 OIC_LOG_V(DEBUG, TAG, "IP network interfaces found: %d", len);
753 for (uint32_t i = 0; i < len; i++)
755 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
761 if ((ifitem->flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
765 if (ifitem->family == AF_INET)
767 struct in_addr inaddr;
768 inaddr.s_addr = ifitem->ipv4addr;
769 applyMulticastToInterface4(inaddr);
770 OIC_LOG_V(DEBUG, TAG, "IPv4 network interface: %s", ifitem->name);
772 if (ifitem->family == AF_INET6)
774 applyMulticastToInterface6(ifitem->index);
775 OIC_LOG_V(DEBUG, TAG, "IPv6 network interface: %s", ifitem->name);
779 u_arraylist_destroy(iflist);
783 CAResult_t CAIPStopListenServer()
785 u_arraylist_t *iflist = CAIPGetInterfaceInformation(0);
788 OIC_LOG_V(ERROR, TAG, "Get interface info failed: %s", strerror(errno));
789 return CA_STATUS_FAILED;
792 uint32_t len = u_arraylist_length(iflist);
793 OIC_LOG_V(DEBUG, TAG, "IP network interfaces found: %d", len);
795 for (uint32_t i = 0; i < len; i++)
797 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
804 if ((ifitem->flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
808 if (ifitem->family == AF_INET)
810 close(caglobals.ip.m4.fd);
811 close(caglobals.ip.m4s.fd);
812 caglobals.ip.m4.fd = -1;
813 caglobals.ip.m4s.fd = -1;
814 OIC_LOG_V(DEBUG, TAG, "IPv4 network interface: %s cloed", ifitem->name);
816 if (ifitem->family == AF_INET6)
818 close(caglobals.ip.m6.fd);
819 close(caglobals.ip.m6s.fd);
820 caglobals.ip.m6.fd = -1;
821 caglobals.ip.m6s.fd = -1;
822 OIC_LOG_V(DEBUG, TAG, "IPv6 network interface: %s", ifitem->name);
825 u_arraylist_destroy(iflist);
829 static void CAProcessNewInterface(CAInterface_t *ifitem)
833 OIC_LOG(DEBUG, TAG, "ifitem is null");
836 if (ifitem->family == AF_INET6)
838 applyMulticastToInterface6(ifitem->index);
840 if (ifitem->family == AF_INET)
842 struct in_addr inaddr = { .s_addr = ifitem->ipv4addr };
843 applyMulticastToInterface4(inaddr);
846 static void CAHandleNetlink()
850 void CAIPSetPacketReceiveCallback(CAIPPacketReceivedCallback callback)
852 g_packetReceivedCallback = callback;
855 void CAIPSetExceptionCallback(CAIPExceptionCallback callback)
857 g_exceptionCallback = callback;
860 void CAIPSetConnectionStateChangeCallback(CAIPConnectionStateChangeCallback callback)
862 CAIPSetNetworkMonitorCallback(callback);
865 static void sendData(int fd, const CAEndpoint_t *endpoint,
866 const void *data, uint32_t dlen,
867 const char *cast, const char *fam)
869 OIC_LOG(DEBUG, TAG, "IN");
873 OIC_LOG(DEBUG, TAG, "endpoint is null");
877 char *secure = (endpoint->flags & CA_SECURE) ? "secure " : "";
878 (void)secure; // eliminates release warning
879 struct sockaddr_storage sock;
880 CAConvertNameToAddr(endpoint->addr, endpoint->port, &sock);
883 if (sock.ss_family == AF_INET6)
885 struct sockaddr_in6 *sock6 = (struct sockaddr_in6 *)&sock;
886 if (!sock6->sin6_scope_id)
888 sock6->sin6_scope_id = endpoint->ifindex;
890 socklen = sizeof(struct sockaddr_in6);
894 socklen = sizeof(struct sockaddr_in);
897 ssize_t len = sendto(fd, data, dlen, 0, (struct sockaddr *)&sock, socklen);
900 // If logging is not defined/enabled.
903 OIC_LOG_V(ERROR, TAG, "%s%s %s sendTo failed: %s", secure, cast, fam, strerror(errno));
907 OIC_LOG_V(INFO, TAG, "%s%s %s sendTo is successful: %zd bytes", secure, cast, fam, len);
911 static void sendMulticastData6(const u_arraylist_t *iflist,
912 CAEndpoint_t *endpoint,
913 const void *data, uint32_t datalen)
917 OIC_LOG(DEBUG, TAG, "endpoint is null");
921 int scope = endpoint->flags & CA_SCOPE_MASK;
922 char *ipv6mcname = ipv6mcnames[scope];
925 OIC_LOG_V(INFO, TAG, "IPv6 multicast scope invalid: %d", scope);
928 OICStrcpy(endpoint->addr, sizeof(endpoint->addr), ipv6mcname);
929 int fd = caglobals.ip.u6.fd;
931 uint32_t len = u_arraylist_length(iflist);
932 for (uint32_t i = 0; i < len; i++)
934 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
939 if ((ifitem->flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
943 if (ifitem->family != AF_INET6)
948 int index = ifitem->index;
949 if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_IF, &index, sizeof (index)))
951 OIC_LOG_V(ERROR, TAG, "setsockopt6 failed: %s", strerror(errno));
954 sendData(fd, endpoint, data, datalen, "multicast", "ipv6");
958 static void sendMulticastData4(const u_arraylist_t *iflist,
959 CAEndpoint_t *endpoint,
960 const void *data, uint32_t datalen)
962 VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint is NULL");
964 struct ip_mreqn mreq = { .imr_multiaddr = IPv4MulticastAddress,
966 OICStrcpy(endpoint->addr, sizeof(endpoint->addr), IPv4_MULTICAST);
967 int fd = caglobals.ip.u4.fd;
969 uint32_t len = u_arraylist_length(iflist);
970 for (uint32_t i = 0; i < len; i++)
972 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
977 if ((ifitem->flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
981 if (ifitem->family != AF_INET)
986 struct in_addr inaddr;
987 inaddr.s_addr = ifitem->ipv4addr;
988 mreq.imr_address = inaddr;
989 if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF, &mreq, sizeof (mreq)))
991 OIC_LOG_V(ERROR, TAG, "send IP_MULTICAST_IF failed: %s (using defualt)",
994 sendData(fd, endpoint, data, datalen, "multicast", "ipv4");
998 void CAIPSendData(CAEndpoint_t *endpoint, const void *data, uint32_t datalen,
1001 VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint is NULL");
1002 VERIFY_NON_NULL_VOID(data, TAG, "data is NULL");
1004 bool isSecure = (endpoint->flags & CA_SECURE) != 0;
1008 endpoint->port = isSecure ? CA_SECURE_COAP : CA_COAP;
1010 u_arraylist_t *iflist = CAIPGetInterfaceInformation(0);
1013 OIC_LOG_V(ERROR, TAG, "get interface info failed: %s", strerror(errno));
1017 if ((endpoint->flags & CA_IPV6) && caglobals.ip.ipv6enabled)
1019 sendMulticastData6(iflist, endpoint, data, datalen);
1021 if ((endpoint->flags & CA_IPV4) && caglobals.ip.ipv4enabled)
1023 sendMulticastData4(iflist, endpoint, data, datalen);
1026 u_arraylist_destroy(iflist);
1030 if (!endpoint->port) // unicast discovery
1032 endpoint->port = isSecure ? CA_SECURE_COAP : CA_COAP;
1036 if (caglobals.ip.ipv6enabled && (endpoint->flags & CA_IPV6))
1038 fd = isSecure ? caglobals.ip.u6s.fd : caglobals.ip.u6.fd;
1039 #ifndef __WITH_DTLS__
1040 fd = caglobals.ip.u6.fd;
1042 sendData(fd, endpoint, data, datalen, "unicast", "ipv6");
1044 if (caglobals.ip.ipv4enabled && (endpoint->flags & CA_IPV4))
1046 fd = isSecure ? caglobals.ip.u4s.fd : caglobals.ip.u4.fd;
1047 #ifndef __WITH_DTLS__
1048 fd = caglobals.ip.u4.fd;
1050 sendData(fd, endpoint, data, datalen, "unicast", "ipv4");
1055 CAResult_t CAGetIPInterfaceInformation(CAEndpoint_t **info, uint32_t *size)
1057 VERIFY_NON_NULL(info, TAG, "info is NULL");
1058 VERIFY_NON_NULL(size, TAG, "size is NULL");
1060 u_arraylist_t *iflist = CAIPGetInterfaceInformation(0);
1063 OIC_LOG_V(ERROR, TAG, "get interface info failed: %s", strerror(errno));
1064 return CA_STATUS_FAILED;
1067 uint32_t len = u_arraylist_length(iflist);
1068 uint32_t length = len;
1070 #ifdef __WITH_DTLS__
1071 //If DTLS is supported, each interface can support secure port as well
1075 CAEndpoint_t *eps = (CAEndpoint_t *)OICCalloc(length, sizeof (CAEndpoint_t));
1078 OIC_LOG(ERROR, TAG, "Malloc Failed");
1079 u_arraylist_destroy(iflist);
1080 return CA_MEMORY_ALLOC_FAILED;
1083 for (uint32_t i = 0, j = 0; i < len; i++)
1085 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
1091 eps[j].adapter = CA_ADAPTER_IP;
1094 if (ifitem->family == AF_INET6)
1096 eps[j].flags = CA_IPV6;
1097 eps[j].port = caglobals.ip.u6.port;
1101 eps[j].flags = CA_IPV4;
1102 eps[j].port = caglobals.ip.u4.port;
1104 inet_ntop(AF_INET, &(ifitem->ipv4addr), eps[j].addr, MAX_ADDR_STR_SIZE_CA);
1107 #ifdef __WITH_DTLS__
1110 eps[j].adapter = CA_ADAPTER_IP;
1113 if (ifitem->family == AF_INET6)
1115 eps[j].flags = CA_IPV6 | CA_SECURE;
1116 eps[j].port = caglobals.ip.u6s.port;
1120 eps[j].flags = CA_IPV4 | CA_SECURE;
1121 eps[j].port = caglobals.ip.u4s.port;
1122 inet_ntop(AF_INET, &(ifitem->ipv4addr), eps[j].addr, MAX_ADDR_STR_SIZE_CA);
1131 u_arraylist_destroy(iflist);
1133 return CA_STATUS_OK;