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))
256 else if (FD_ISSET(caglobals.ip.shutdownFds[0], readFds))
259 ssize_t len = read(caglobals.ip.shutdownFds[0], buf, sizeof (buf));
265 CAInterface_t *ifchanged = CAFindInterfaceChange();
268 CAProcessNewInterface(ifchanged);
278 (void)CAReceiveMessage(fd, flags);
283 static CAResult_t CAReceiveMessage(int fd, CATransportFlags_t flags)
285 char recvBuffer[COAP_MAX_PDU_SIZE];
288 int level, type, namelen;
289 struct sockaddr_storage srcAddr;
290 unsigned char *pktinfo = NULL;
291 struct cmsghdr *cmp = NULL;
292 struct iovec iov = { recvBuffer, sizeof (recvBuffer) };
296 unsigned char data[CMSG_SPACE(sizeof (struct in6_pktinfo))];
301 namelen = sizeof (struct sockaddr_in6);
302 level = IPPROTO_IPV6;
304 len = sizeof (struct in6_pktinfo);
308 namelen = sizeof (struct sockaddr_in);
311 len = sizeof (struct in6_pktinfo);
314 struct msghdr msg = { .msg_name = &srcAddr,
315 .msg_namelen = namelen,
318 .msg_control = &cmsg,
319 .msg_controllen = CMSG_SPACE(len) };
321 ssize_t recvLen = recvmsg(fd, &msg, flags);
324 OIC_LOG_V(ERROR, TAG, "Recvfrom failed %s", strerror(errno));
325 return CA_STATUS_FAILED;
328 if (flags & CA_MULTICAST)
330 for (cmp = CMSG_FIRSTHDR(&msg); cmp != NULL; cmp = CMSG_NXTHDR(&msg, cmp))
332 if (cmp->cmsg_level == level && cmp->cmsg_type == type)
334 pktinfo = CMSG_DATA(cmp);
339 CASecureEndpoint_t sep = {.endpoint = {.adapter = CA_ADAPTER_IP, .flags = flags}};
343 sep.endpoint.interface = ((struct sockaddr_in6 *)&srcAddr)->sin6_scope_id;
344 ((struct sockaddr_in6 *)&srcAddr)->sin6_scope_id = 0;
346 if ((flags & CA_MULTICAST) && pktinfo)
348 struct in6_addr *addr = &(((struct in6_pktinfo *)pktinfo)->ipi6_addr);
349 unsigned char topbits = ((unsigned char *)addr)[0];
352 sep.endpoint.flags &= ~CA_MULTICAST;
358 if ((flags & CA_MULTICAST) && pktinfo)
360 struct in_addr *addr = &((struct in_pktinfo *)pktinfo)->ipi_addr;
361 uint32_t host = ntohl(addr->s_addr);
362 unsigned char topbits = ((unsigned char *)&host)[3];
363 if (topbits < 224 || topbits > 239)
365 sep.endpoint.flags &= ~CA_MULTICAST;
370 CAConvertAddrToName(&srcAddr, msg.msg_namelen, sep.endpoint.addr, &sep.endpoint.port);
372 if (flags & CA_SECURE)
375 int ret = CAAdapterNetDtlsDecrypt(&sep, (uint8_t *)recvBuffer, recvLen);
376 OIC_LOG_V(DEBUG, TAG, "CAAdapterNetDtlsDecrypt returns [%d]", ret);
378 OIC_LOG(ERROR, TAG, "Encrypted message but no DTLS");
383 if (g_packetReceivedCallback)
385 g_packetReceivedCallback(&sep, recvBuffer, recvLen);
394 OIC_LOG(DEBUG, TAG, "IN");
395 OIC_LOG(DEBUG, TAG, "OUT");
398 static int CACreateSocket(int family, uint16_t *port)
400 int socktype = SOCK_DGRAM;
402 socktype |= SOCK_CLOEXEC;
404 int fd = socket(family, socktype, IPPROTO_UDP);
407 OIC_LOG_V(ERROR, TAG, "create socket failed: %s", strerror(errno));
412 int fl = fcntl(fd, F_GETFD);
413 if (-1 == fl || -1 == fcntl(fd, F_SETFD, fl|FD_CLOEXEC))
415 OIC_LOG_V(ERROR, TAG, "set FD_CLOEXEC failed: %s", strerror(errno));
421 struct sockaddr_storage sa = { .ss_family = family };
424 if (family == AF_INET6)
428 if (-1 == setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof (on)))
430 OIC_LOG_V(ERROR, TAG, "IPV6_V6ONLY failed: %s", strerror(errno));
433 if (*port) // only do this for multicast ports
435 if (-1 == setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &on, sizeof (on)))
437 OIC_LOG_V(ERROR, TAG, "IPV6_RECVPKTINFO failed: %s", strerror(errno));
441 ((struct sockaddr_in6 *)&sa)->sin6_port = htons(*port);
442 socklen = sizeof (struct sockaddr_in6);
446 if (*port) // only do this for multicast ports
449 if (-1 == setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &on, sizeof (on)))
451 OIC_LOG_V(ERROR, TAG, "IP_PKTINFO failed: %s", strerror(errno));
455 ((struct sockaddr_in *)&sa)->sin_port = htons(*port);
456 socklen = sizeof (struct sockaddr_in);
459 if (*port) // use the given port
462 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof (on)))
464 OIC_LOG_V(ERROR, TAG, "SO_REUSEADDR failed: %s", strerror(errno));
470 if (-1 == bind(fd, (struct sockaddr *)&sa, socklen))
472 OIC_LOG_V(ERROR, TAG, "bind socket failed: %s", strerror(errno));
477 if (!*port) // return the assigned port
479 if (-1 == getsockname(fd, (struct sockaddr *)&sa, &socklen))
481 OIC_LOG_V(ERROR, TAG, "getsockname failed: %s", strerror(errno));
485 *port = ntohs(family == AF_INET6 ?
486 ((struct sockaddr_in6 *)&sa)->sin6_port :
487 ((struct sockaddr_in *)&sa)->sin_port);
493 #define CHECKFD(FD) \
494 if (FD > caglobals.ip.maxfd) \
495 caglobals.ip.maxfd = FD;
496 #define NEWSOCKET(FAMILY, NAME) \
497 caglobals.ip.NAME.fd = CACreateSocket(FAMILY, &caglobals.ip.NAME.port); \
498 CHECKFD(caglobals.ip.NAME.fd)
500 static void CAInitializeNetlink()
503 // create NETLINK fd for interface change notifications
504 struct sockaddr_nl sa = { AF_NETLINK, 0, 0, RTMGRP_LINK };
506 caglobals.ip.netlinkFd = socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE);
507 if (caglobals.ip.netlinkFd == -1)
509 OIC_LOG_V(ERROR, TAG, "netlink socket failed: %s", strerror(errno));
513 int r = bind(caglobals.ip.netlinkFd, (struct sockaddr *)&sa, sizeof (sa));
516 OIC_LOG_V(ERROR, TAG, "netlink bind failed: %s", strerror(errno));
517 close(caglobals.ip.netlinkFd);
518 caglobals.ip.netlinkFd = -1;
522 CHECKFD(caglobals.ip.netlinkFd);
528 static void CAInitializePipe()
530 caglobals.ip.selectTimeout = -1;
532 int ret = pipe2(caglobals.ip.shutdownFds, O_CLOEXEC);
534 int ret = pipe(caglobals.ip.shutdownFds);
537 ret = fcntl(caglobals.ip.shutdownFds[0], F_GETFD);
540 ret = fcntl(caglobals.ip.shutdownFds[0], F_SETFD, ret|FD_CLOEXEC);
544 ret = fcntl(caglobals.ip.shutdownFds[1], F_GETFD);
548 ret = fcntl(caglobals.ip.shutdownFds[1], F_SETFD, ret|FD_CLOEXEC);
552 close(caglobals.ip.shutdownFds[1]);
553 close(caglobals.ip.shutdownFds[0]);
554 caglobals.ip.shutdownFds[0] = -1;
555 caglobals.ip.shutdownFds[1] = -1;
561 OIC_LOG_V(ERROR, TAG, "pipe failed: %s", strerror(errno));
562 caglobals.ip.selectTimeout = SELECT_TIMEOUT; //poll needed for shutdown
566 CAResult_t CAIPStartServer(const ca_thread_pool_t threadPool)
568 CAResult_t res = CA_STATUS_OK;
570 if (caglobals.ip.started)
575 if (!IPv4MulticastAddress.s_addr)
577 (void)inet_pton(AF_INET, IPv4_MULTICAST, &IPv4MulticastAddress);
578 (void)inet_pton(AF_INET6, IPv6_MULTICAST_INT, &IPv6MulticastAddressInt);
579 (void)inet_pton(AF_INET6, IPv6_MULTICAST_LNK, &IPv6MulticastAddressLnk);
580 (void)inet_pton(AF_INET6, IPv6_MULTICAST_RLM, &IPv6MulticastAddressRlm);
581 (void)inet_pton(AF_INET6, IPv6_MULTICAST_ADM, &IPv6MulticastAddressAdm);
582 (void)inet_pton(AF_INET6, IPv6_MULTICAST_SIT, &IPv6MulticastAddressSit);
583 (void)inet_pton(AF_INET6, IPv6_MULTICAST_ORG, &IPv6MulticastAddressOrg);
584 (void)inet_pton(AF_INET6, IPv6_MULTICAST_GLB, &IPv6MulticastAddressGlb);
587 if (!caglobals.ip.ipv6enabled && !caglobals.ip.ipv4enabled)
589 caglobals.ip.ipv4enabled = true; // only needed to run CA tests
592 if (caglobals.ip.ipv6enabled)
594 NEWSOCKET(AF_INET6, u6)
595 NEWSOCKET(AF_INET6, u6s)
596 NEWSOCKET(AF_INET6, m6)
597 NEWSOCKET(AF_INET6, m6s)
598 OIC_LOG_V(INFO, TAG, "IPv6 unicast port: %u", caglobals.ip.u6.port);
600 if (caglobals.ip.ipv4enabled)
602 NEWSOCKET(AF_INET, u4)
603 NEWSOCKET(AF_INET, u4s)
604 NEWSOCKET(AF_INET, m4)
605 NEWSOCKET(AF_INET, m4s)
606 OIC_LOG_V(INFO, TAG, "IPv4 unicast port: %u", caglobals.ip.u4.port);
609 OIC_LOG_V(DEBUG, TAG,
610 "socket summary: u6=%d, u6s=%d, u4=%d, u4s=%d, m6=%d, m6s=%d, m4=%d, m4s=%d",
611 caglobals.ip.u6.fd, caglobals.ip.u6s.fd, caglobals.ip.u4.fd, caglobals.ip.u4s.fd,
612 caglobals.ip.m6.fd, caglobals.ip.m6s.fd, caglobals.ip.m4.fd, caglobals.ip.m4s.fd);
614 OIC_LOG_V(DEBUG, TAG,
615 "port summary: u6 port=%d, u6s port=%d, u4 port=%d, u4s port=%d, m6 port=%d,"
616 "m6s port=%d, m4 port=%d, m4s port=%d",
617 caglobals.ip.u6.port, caglobals.ip.u6s.port, caglobals.ip.u4.port,
618 caglobals.ip.u4s.port, caglobals.ip.m6.port, caglobals.ip.m6s.port,
619 caglobals.ip.m4.port, caglobals.ip.m4s.port);
620 // create pipe for fast shutdown
622 CHECKFD(caglobals.ip.shutdownFds[0]);
623 CHECKFD(caglobals.ip.shutdownFds[1]);
625 // create source of network interface change notifications
626 CAInitializeNetlink();
628 caglobals.ip.selectTimeout = CAGetPollingInterval(caglobals.ip.selectTimeout);
630 res = CAIPStartListenServer();
631 if (CA_STATUS_OK != res)
633 OIC_LOG_V(ERROR, TAG, "Failed to start listening server![%d]", res);
637 caglobals.ip.terminate = false;
638 res = ca_thread_pool_add_task(threadPool, CAReceiveHandler, NULL);
639 if (CA_STATUS_OK != res)
641 OIC_LOG(ERROR, TAG, "thread_pool_add_task failed");
644 OIC_LOG(DEBUG, TAG, "CAReceiveHandler thread started successfully.");
646 caglobals.ip.started = true;
650 void CAIPStopServer()
652 caglobals.ip.started = false;
653 caglobals.ip.terminate = true;
655 if (caglobals.ip.shutdownFds[1] != -1)
657 close(caglobals.ip.shutdownFds[1]);
658 // receive thread will stop immediately
662 // receive thread will stop in SELECT_TIMEOUT seconds.
666 void CAWakeUpForChange()
668 if (caglobals.ip.shutdownFds[1] != -1)
673 len = write(caglobals.ip.shutdownFds[1], "w", 1);
674 } while ((len == -1) && (errno == EINTR));
675 if ((len == -1) && (errno != EINTR) && (errno != EPIPE))
677 OIC_LOG_V(DEBUG, TAG, "write failed: %s", strerror(errno));
682 static void applyMulticastToInterface4(struct in_addr inaddr)
684 if (!caglobals.ip.ipv4enabled)
689 struct ip_mreqn mreq = { .imr_multiaddr = IPv4MulticastAddress,
690 .imr_address = inaddr,
692 if (setsockopt(caglobals.ip.m4.fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof (mreq)))
694 if (EADDRINUSE != errno)
696 OIC_LOG_V(ERROR, TAG, "IPv4 IP_ADD_MEMBERSHIP failed: %s", strerror(errno));
699 if (setsockopt(caglobals.ip.m4s.fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof (mreq)))
701 if (EADDRINUSE != errno)
703 OIC_LOG_V(ERROR, TAG, "secure IPv4 IP_ADD_MEMBERSHIP failed: %s", strerror(errno));
708 static void applyMulticast6(int fd, struct in6_addr *addr, uint32_t interface)
710 struct ipv6_mreq mreq = {.ipv6mr_multiaddr = *addr, .ipv6mr_interface = interface};
712 if (setsockopt(fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq, sizeof (mreq)))
714 if (EADDRINUSE != errno)
716 OIC_LOG_V(ERROR, TAG, "IPv6 IP_ADD_MEMBERSHIP failed: %s", strerror(errno));
721 static void applyMulticastToInterface6(uint32_t interface)
723 if (!caglobals.ip.ipv6enabled)
727 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressInt, interface);
728 applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressLnk, interface);
729 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressRlm, interface);
730 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressAdm, interface);
731 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressSit, interface);
732 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressOrg, interface);
733 //applyMulticast6(caglobals.ip.m6.fd, &IPv6MulticastAddressGlb, interface);
735 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressInt, interface);
736 applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressLnk, interface);
737 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressRlm, interface);
738 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressAdm, interface);
739 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressSit, interface);
740 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressOrg, interface);
741 //applyMulticast6(caglobals.ip.m6s.fd, &IPv6MulticastAddressGlb, interface);
744 CAResult_t CAIPStartListenServer()
746 u_arraylist_t *iflist = CAIPGetInterfaceInformation(0);
749 OIC_LOG_V(ERROR, TAG, "get interface info failed: %s", strerror(errno));
750 return CA_STATUS_FAILED;
753 uint32_t len = u_arraylist_length(iflist);
754 OIC_LOG_V(DEBUG, TAG, "IP network interfaces found: %d", len);
756 for (uint32_t i = 0; i < len; i++)
758 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
764 if ((ifitem->flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
768 if (ifitem->family == AF_INET)
770 struct in_addr inaddr;
771 inaddr.s_addr = ifitem->ipv4addr;
772 applyMulticastToInterface4(inaddr);
773 OIC_LOG_V(DEBUG, TAG, "IPv4 network interface: %s", ifitem->name);
775 if (ifitem->family == AF_INET6)
777 applyMulticastToInterface6(ifitem->index);
778 OIC_LOG_V(DEBUG, TAG, "IPv6 network interface: %s", ifitem->name);
782 u_arraylist_destroy(iflist);
786 CAResult_t CAIPStopListenServer()
788 u_arraylist_t *iflist = CAIPGetInterfaceInformation(0);
791 OIC_LOG_V(ERROR, TAG, "Get interface info failed: %s", strerror(errno));
792 return CA_STATUS_FAILED;
795 uint32_t len = u_arraylist_length(iflist);
796 OIC_LOG_V(DEBUG, TAG, "IP network interfaces found: %d", len);
798 for (uint32_t i = 0; i < len; i++)
800 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
807 if ((ifitem->flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
811 if (ifitem->family == AF_INET)
813 close(caglobals.ip.m4.fd);
814 close(caglobals.ip.m4s.fd);
815 caglobals.ip.m4.fd = -1;
816 caglobals.ip.m4s.fd = -1;
817 OIC_LOG_V(DEBUG, TAG, "IPv4 network interface: %s cloed", ifitem->name);
819 if (ifitem->family == AF_INET6)
821 close(caglobals.ip.m6.fd);
822 close(caglobals.ip.m6s.fd);
823 caglobals.ip.m6.fd = -1;
824 caglobals.ip.m6s.fd = -1;
825 OIC_LOG_V(DEBUG, TAG, "IPv6 network interface: %s", ifitem->name);
828 u_arraylist_destroy(iflist);
832 static void CAProcessNewInterface(CAInterface_t *ifitem)
836 OIC_LOG(DEBUG, TAG, "ifitem is null");
840 applyMulticastToInterface6(ifitem->index);
841 struct in_addr inaddr = { .s_addr = ifitem->ipv4addr };
842 applyMulticastToInterface4(inaddr);
844 static void CAHandleNetlink()
849 struct sockaddr_nl sa;
850 struct iovec iov = { buf, sizeof (buf) };
851 struct msghdr msg = { (void *)&sa, sizeof (sa), &iov, 1, NULL, 0, 0 };
853 size_t len = recvmsg(caglobals.ip.netlinkFd, &msg, 0);
855 for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len); nh = NLMSG_NEXT(nh, len))
857 if (nh != NULL && nh->nlmsg_type != RTM_NEWLINK)
862 struct ifinfomsg *ifi = (struct ifinfomsg *)NLMSG_DATA(nh);
863 if (!ifi || (ifi->ifi_flags & IFF_LOOPBACK) || !(ifi->ifi_flags & IFF_RUNNING))
868 int newIndex = ifi->ifi_index;
870 u_arraylist_t *iflist = CAIPGetInterfaceInformation(newIndex);
873 OIC_LOG_V(ERROR, TAG, "get interface info failed: %s", strerror(errno));
877 uint32_t listLength = u_arraylist_length(iflist);
878 for (uint32_t i = 0; i < listLength; i++)
880 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
886 if ((int)ifitem->index != newIndex)
891 CAProcessNewInterface(ifitem);
892 break; // we found the one we were looking for
894 u_arraylist_destroy(iflist);
899 void CAIPSetPacketReceiveCallback(CAIPPacketReceivedCallback callback)
901 g_packetReceivedCallback = callback;
904 void CAIPSetExceptionCallback(CAIPExceptionCallback callback)
906 g_exceptionCallback = callback;
909 static void sendData(int fd, const CAEndpoint_t *endpoint,
910 const void *data, uint32_t dlen,
911 const char *cast, const char *fam)
913 OIC_LOG(DEBUG, TAG, "IN");
917 OIC_LOG(DEBUG, TAG, "endpoint is null");
921 char *secure = (endpoint->flags & CA_SECURE) ? "secure " : "";
922 (void)secure; // eliminates release warning
923 struct sockaddr_storage sock;
924 CAConvertNameToAddr(endpoint->addr, endpoint->port, &sock);
927 if (sock.ss_family == AF_INET6)
929 struct sockaddr_in6 *sock6 = (struct sockaddr_in6 *)&sock;
930 if (!sock6->sin6_scope_id)
932 sock6->sin6_scope_id = endpoint->interface;
934 socklen = sizeof(struct sockaddr_in6);
938 socklen = sizeof(struct sockaddr_in);
941 ssize_t len = sendto(fd, data, dlen, 0, (struct sockaddr *)&sock, socklen);
944 // If logging is not defined/enabled.
947 OIC_LOG_V(ERROR, TAG, "%s%s %s sendTo failed: %s", secure, cast, fam, strerror(errno));
951 OIC_LOG_V(INFO, TAG, "%s%s %s sendTo is successful: %zd bytes", secure, cast, fam, len);
955 static void sendMulticastData6(const u_arraylist_t *iflist,
956 CAEndpoint_t *endpoint,
957 const void *data, uint32_t datalen)
961 OIC_LOG(DEBUG, TAG, "endpoint is null");
965 int scope = endpoint->flags & CA_SCOPE_MASK;
966 char *ipv6mcname = ipv6mcnames[scope];
969 OIC_LOG_V(INFO, TAG, "IPv6 multicast scope invalid: %d", scope);
972 OICStrcpy(endpoint->addr, sizeof(endpoint->addr), ipv6mcname);
973 int fd = caglobals.ip.u6.fd;
975 uint32_t len = u_arraylist_length(iflist);
976 for (uint32_t i = 0; i < len; i++)
978 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
983 if ((ifitem->flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
987 if (ifitem->family != AF_INET6)
992 int index = ifitem->index;
993 if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_IF, &index, sizeof (index)))
995 OIC_LOG_V(ERROR, TAG, "setsockopt6 failed: %s", strerror(errno));
998 sendData(fd, endpoint, data, datalen, "multicast", "ipv6");
1002 static void sendMulticastData4(const u_arraylist_t *iflist,
1003 CAEndpoint_t *endpoint,
1004 const void *data, uint32_t datalen)
1006 VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint is NULL");
1008 struct ip_mreqn mreq = { .imr_multiaddr = IPv4MulticastAddress,
1010 OICStrcpy(endpoint->addr, sizeof(endpoint->addr), IPv4_MULTICAST);
1011 int fd = caglobals.ip.u4.fd;
1013 uint32_t len = u_arraylist_length(iflist);
1014 for (uint32_t i = 0; i < len; i++)
1016 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
1021 if ((ifitem->flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
1025 if (ifitem->family != AF_INET)
1030 struct in_addr inaddr;
1031 inaddr.s_addr = ifitem->ipv4addr;
1032 mreq.imr_address = inaddr;
1033 if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF, &mreq, sizeof (mreq)))
1035 OIC_LOG_V(ERROR, TAG, "send IP_MULTICAST_IF failed: %s (using defualt)",
1038 sendData(fd, endpoint, data, datalen, "multicast", "ipv4");
1042 void CAIPSendData(CAEndpoint_t *endpoint, const void *data, uint32_t datalen,
1045 VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint is NULL");
1046 VERIFY_NON_NULL_VOID(data, TAG, "data is NULL");
1048 bool isSecure = (endpoint->flags & CA_SECURE) != 0;
1052 endpoint->port = isSecure ? CA_SECURE_COAP : CA_COAP;
1054 u_arraylist_t *iflist = CAIPGetInterfaceInformation(0);
1057 OIC_LOG_V(ERROR, TAG, "get interface info failed: %s", strerror(errno));
1061 if ((endpoint->flags & CA_IPV6) && caglobals.ip.ipv6enabled)
1063 sendMulticastData6(iflist, endpoint, data, datalen);
1065 if ((endpoint->flags & CA_IPV4) && caglobals.ip.ipv4enabled)
1067 sendMulticastData4(iflist, endpoint, data, datalen);
1070 u_arraylist_destroy(iflist);
1074 if (!endpoint->port) // unicast discovery
1076 endpoint->port = isSecure ? CA_SECURE_COAP : CA_COAP;
1080 if (caglobals.ip.ipv6enabled && (endpoint->flags & CA_IPV6))
1082 fd = isSecure ? caglobals.ip.u6s.fd : caglobals.ip.u6.fd;
1083 #ifndef __WITH_DTLS__
1084 fd = caglobals.ip.u6.fd;
1086 sendData(fd, endpoint, data, datalen, "unicast", "ipv6");
1088 if (caglobals.ip.ipv4enabled && (endpoint->flags & CA_IPV4))
1090 fd = isSecure ? caglobals.ip.u4s.fd : caglobals.ip.u4.fd;
1091 #ifndef __WITH_DTLS__
1092 fd = caglobals.ip.u4.fd;
1094 sendData(fd, endpoint, data, datalen, "unicast", "ipv4");
1099 CAResult_t CAGetIPInterfaceInformation(CAEndpoint_t **info, uint32_t *size)
1101 VERIFY_NON_NULL(info, TAG, "info is NULL");
1102 VERIFY_NON_NULL(size, TAG, "size is NULL");
1104 u_arraylist_t *iflist = CAIPGetInterfaceInformation(0);
1107 OIC_LOG_V(ERROR, TAG, "get interface info failed: %s", strerror(errno));
1108 return CA_STATUS_FAILED;
1111 uint32_t len = u_arraylist_length(iflist);
1112 uint32_t length = len;
1114 #ifdef __WITH_DTLS__
1115 //If DTLS is supported, each interface can support secure port as well
1119 CAEndpoint_t *eps = (CAEndpoint_t *)OICCalloc(length, sizeof (CAEndpoint_t));
1122 OIC_LOG(ERROR, TAG, "Malloc Failed");
1123 u_arraylist_destroy(iflist);
1124 return CA_MEMORY_ALLOC_FAILED;
1127 for (uint32_t i = 0, j = 0; i < len; i++)
1129 CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
1135 eps[j].adapter = CA_ADAPTER_IP;
1136 eps[j].interface = 0;
1138 if (ifitem->family == AF_INET6)
1140 eps[j].flags = CA_IPV6;
1141 eps[j].port = caglobals.ip.u6.port;
1145 eps[j].flags = CA_IPV4;
1146 eps[j].port = caglobals.ip.u4.port;
1148 inet_ntop(AF_INET, &(ifitem->ipv4addr), eps[j].addr, MAX_ADDR_STR_SIZE_CA);
1151 #ifdef __WITH_DTLS__
1154 eps[j].adapter = CA_ADAPTER_IP;
1155 eps[j].interface = 0;
1157 if (ifitem->family == AF_INET6)
1159 eps[j].flags = CA_IPV6 | CA_SECURE;
1160 eps[j].port = caglobals.ip.u6s.port;
1164 eps[j].flags = CA_IPV4 | CA_SECURE;
1165 eps[j].port = caglobals.ip.u4s.port;
1166 inet_ntop(AF_INET, &(ifitem->ipv4addr), eps[j].addr, MAX_ADDR_STR_SIZE_CA);
1175 u_arraylist_destroy(iflist);
1177 return CA_STATUS_OK;