static CAResult_t CAReceiveMessage(int fd, CATransportFlags_t flags)
{
char recvBuffer[COAP_MAX_PDU_SIZE];
struct sockaddr_storage srcAddr;
socklen_t srcAddrLen = sizeof (srcAddr);
ssize_t recvLen = recvfrom(fd,
recvBuffer,
sizeof (recvBuffer),
0,
(struct sockaddr *)&srcAddr,
&srcAddrLen);
if (-1 == recvLen)
{
OIC_LOG_V(ERROR, TAG, "Recvfrom failed %s", strerror(errno));
return CA_STATUS_FAILED;
}
CASecureEndpoint_t sep =
{.endpoint = {.adapter = CA_ADAPTER_IP, .flags = flags}};
if (flags & CA_IPV6)
{
sep.endpoint.interface = ((struct sockaddr_in6 *)&srcAddr)->sin6_scope_id;
((struct sockaddr_in6 *)&srcAddr)->sin6_scope_id = 0;
}
CAConvertAddrToName(&srcAddr, sep.endpoint.addr, &sep.endpoint.port);
if (flags & CA_SECURE)
{
#ifdef __WITH_DTLS__
int ret = CAAdapterNetDtlsDecrypt(&sep, (uint8_t *)recvBuffer, recvLen);
OIC_LOG_V(DEBUG, TAG, "CAAdapterNetDtlsDecrypt returns [%d]", ret);
#else
OIC_LOG(ERROR, TAG, "Encrypted message but no DTLS");
#endif
}
else
{
if (g_packetReceivedCallback)
{
g_packetReceivedCallback(&sep, recvBuffer, recvLen);
}
}
return CA_STATUS_OK;
}
static CAResult_t CAReceiveMessage(int fd, CATransportFlags_t flags)
{
char recvBuffer[COAP_MAX_PDU_SIZE];
size_t len;
int level, type, namelen;
struct sockaddr_storage srcAddr;
unsigned char *pktinfo = NULL;
struct cmsghdr *cmp = NULL;
struct iovec iov = { recvBuffer, sizeof (recvBuffer) };
union control
{
struct cmsghdr cmsg;
unsigned char data[CMSG_SPACE(sizeof (struct in6_pktinfo))];
} cmsg;
if (flags & CA_IPV6)
{
namelen = sizeof (struct sockaddr_in6);
level = IPPROTO_IPV6;
type = IPV6_PKTINFO;
len = sizeof (struct in6_pktinfo);
}
else
{
namelen = sizeof (struct sockaddr_in);
level = IPPROTO_IP;
type = IP_PKTINFO;
len = sizeof (struct in6_pktinfo);
}
struct msghdr msg = { .msg_name = &srcAddr,
.msg_namelen = namelen,
.msg_iov = &iov,
.msg_iovlen = 1,
.msg_control = &cmsg,
.msg_controllen = CMSG_SPACE(len) };
ssize_t recvLen = recvmsg(fd, &msg, flags);
if (-1 == recvLen)
{
OIC_LOG_V(ERROR, TAG, "Recvfrom failed %s", strerror(errno));
return CA_STATUS_FAILED;
}
if (flags & CA_MULTICAST)
{
for (cmp = CMSG_FIRSTHDR(&msg); cmp != NULL; cmp = CMSG_NXTHDR(&msg, cmp))
{
if (cmp->cmsg_level == level && cmp->cmsg_type == type)
{
pktinfo = CMSG_DATA(cmp);
}
}
}
CASecureEndpoint_t sep = {.endpoint = {.adapter = CA_ADAPTER_IP, .flags = flags}};
if (flags & CA_IPV6)
{
sep.endpoint.interface = ((struct sockaddr_in6 *)&srcAddr)->sin6_scope_id;
((struct sockaddr_in6 *)&srcAddr)->sin6_scope_id = 0;
if ((flags & CA_MULTICAST) && pktinfo)
{
struct in6_addr *addr = &(((struct in6_pktinfo *)pktinfo)->ipi6_addr);
unsigned char topbits = ((unsigned char *)addr)[0];
if (topbits != 0xff)
{
sep.endpoint.flags &= ~CA_MULTICAST;
}
}
}
else
{
if ((flags & CA_MULTICAST) && pktinfo)
{
struct in_addr *addr = &((struct in_pktinfo *)pktinfo)->ipi_addr;
uint32_t host = ntohl(addr->s_addr);
unsigned char topbits = ((unsigned char *)&host)[3];
if (topbits < 224 || topbits > 239)
{
sep.endpoint.flags &= ~CA_MULTICAST;
}
}
}
CAConvertAddrToName(&srcAddr, msg.msg_namelen, sep.endpoint.addr, &sep.endpoint.port);
if (flags & CA_SECURE)
{
#ifdef __WITH_DTLS__
int ret = CAAdapterNetDtlsDecrypt(&sep, (uint8_t *)recvBuffer, recvLen);
OIC_LOG_V(DEBUG, TAG, "CAAdapterNetDtlsDecrypt returns [%d]", ret);
#else
OIC_LOG(ERROR, TAG, "Encrypted message but no DTLS");
#endif
}
else
{
if (g_packetReceivedCallback)
{
g_packetReceivedCallback(&sep, recvBuffer, recvLen);
}
}
return CA_STATUS_OK;
}
static void CAReceiveHandler(void *data)
{
OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
fd_set readFds;
int maxSd = 0;
struct timeval timeout;
char recvBuffer[COAP_MAX_PDU_SIZE] = { 0 };
while (true != g_packetHandlerStopFlag)
{
timeout.tv_sec = 1;
timeout.tv_usec = 0;
FD_ZERO(&readFds);
ca_mutex_lock(g_mutexServerInfoList);
uint32_t listIndex = 0;
uint32_t listLength = u_arraylist_length(g_serverInfoList);
u_arraylist_t *tempServerInfoList = u_arraylist_create();
if (!tempServerInfoList)
{
OIC_LOG(ERROR, IP_SERVER_TAG, "u_arraylist_create failed");
ca_mutex_unlock(g_mutexServerInfoList);
return;
}
for (listIndex = 0; listIndex < listLength; listIndex++)
{
CAServerInfo_t *info = (CAServerInfo_t *) u_arraylist_get(g_serverInfoList, listIndex);
if (!info)
{
listIndex++;
continue;
}
int sd = info->socketFd;
//if valid socket descriptor then add to read list
if (sd > 0)
{
FD_SET(sd, &readFds);
}
//highest file descriptor number, need it for the select function
if (sd > maxSd)
{
maxSd = sd;
}
CAServerInfo_t *newInfo = (CAServerInfo_t *) OICMalloc(sizeof(CAServerInfo_t));
if (!newInfo)
{
OIC_LOG(ERROR, IP_SERVER_TAG, "Malloc failed");
CAClearServerInfoList(tempServerInfoList);
ca_mutex_unlock(g_mutexServerInfoList);
return;
}
*newInfo = *info;
CAResult_t result = u_arraylist_add(tempServerInfoList, (void *) newInfo);
if (CA_STATUS_OK != result)
{
OIC_LOG(ERROR, IP_SERVER_TAG, "u_arraylist_add failed!Thread exit");
CAClearServerInfoList(tempServerInfoList);
ca_mutex_unlock(g_mutexServerInfoList);
return;
}
}
ca_mutex_unlock(g_mutexServerInfoList);
int ret = select(maxSd + 1, &readFds, NULL, NULL, &timeout);
if (g_packetHandlerStopFlag)
{
OIC_LOG_V(DEBUG, IP_SERVER_TAG,
"Packet receiver handler Stop request received. Thread exited");
CAClearServerInfoList(tempServerInfoList);
break;
}
if (ret < 0)
{
OIC_LOG_V(FATAL, IP_SERVER_TAG, "select returned error %s", strerror(errno));
CAClearServerInfoList(tempServerInfoList);
continue;
}
listLength = u_arraylist_length(tempServerInfoList);
for (listIndex = 0; listIndex < listLength; listIndex++)
{
CAServerInfo_t *info = (CAServerInfo_t *) u_arraylist_get(tempServerInfoList,
listIndex);
if (!info)
{
continue;
}
int sd = info->socketFd;
if (FD_ISSET(sd , &readFds))
{
OIC_LOG_V(ERROR, IP_SERVER_TAG,
"data Received server information ip %s, port %d socket %d",
info->endpoint.addr, info->endpoint.port, sd);
memset(recvBuffer, 0, sizeof(recvBuffer));
struct sockaddr_in srcSockAddress = { 0 };
socklen_t srcAddressLen = sizeof(srcSockAddress);
//Reading from socket
ssize_t recvLen = recvfrom(sd, recvBuffer, sizeof(recvBuffer), 0,
(struct sockaddr *) &srcSockAddress, &srcAddressLen);
if (-1 == recvLen)
{
OIC_LOG_V(ERROR, IP_SERVER_TAG, "Recvfrom failed %s", strerror(errno));
continue;
}
else if (0 == recvLen)
{
OIC_LOG_V(ERROR, IP_SERVER_TAG, "Server socket shutdown sock fd[%d]", sd);
ca_mutex_lock(g_mutexAdapterServerContext);
// Notify upper layer this exception
if (g_adapterIPServerContext->exceptionCallback)
{
// need to make proper exception callback.
//g_adapterIPServerContext->exceptionCallback(ctx->type);
}
ca_mutex_unlock(g_mutexAdapterServerContext);
}
char srcIPAddress[CA_IPADDR_SIZE] = { 0 };
if (!inet_ntop(AF_INET, &srcSockAddress.sin_addr.s_addr, srcIPAddress,
sizeof(srcIPAddress)))
{
OIC_LOG(ERROR, IP_SERVER_TAG, "inet_ntop is failed!");
continue;
}
uint16_t srcPort = ntohs(srcSockAddress.sin_port);
OIC_LOG_V(DEBUG, IP_SERVER_TAG, "Received packet from %s:%d len %d",
srcIPAddress, srcPort, recvLen);
char *netMask = NULL;
if (CA_STATUS_OK != CAIPGetInterfaceSubnetMask(info->ifAddr, &netMask))
{
OIC_LOG(ERROR, IP_SERVER_TAG, "Failed to get IP subnet");
continue;
}
if (!CAAdapterIsSameSubnet(info->ifAddr, srcIPAddress, netMask))
{
OIC_LOG(DEBUG, IP_SERVER_TAG,
"Packet received from different subnet, Ignore!");
OICFree(netMask);
continue;
}
OICFree(netMask);
CAEndpoint_t ep;
strncpy(ep.addr, srcIPAddress, MAX_ADDR_STR_SIZE_CA);
ep.port = srcPort;
ep.flags = (CATransportFlags_t)CA_IPV4 | CA_IPV6;
ep.adapter = CA_ADAPTER_IP;
if (info->endpoint.flags & CA_SECURE)
{
#ifdef __WITH_DTLS__
ep.flags |= CA_SECURE;
(void)CAAdapterNetDtlsDecrypt(&ep, (uint8_t *)recvBuffer, recvLen);
OIC_LOG_V(DEBUG, IP_SERVER_TAG,
"CAAdapterNetDtlsDecrypt returns [%d]", ret);
#endif
}
else //both multicast and unicast
{
ca_mutex_lock(g_mutexAdapterServerContext);
if (g_adapterIPServerContext->packetReceivedCallback)
{
g_adapterIPServerContext->packetReceivedCallback(&ep,
recvBuffer, recvLen);
}
ca_mutex_unlock(g_mutexAdapterServerContext);
}
}
}
CAClearServerInfoList(tempServerInfoList);
}
OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
}