fsfw/osal/linux/TmTcUnixUdpBridge.cpp

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#include <framework/osal/linux/TmTcUnixUdpBridge.h>
#include <framework/serviceinterface/ServiceInterfaceStream.h>
#include <framework/ipc/MutexHelper.h>
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#include <errno.h>
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TmTcUnixUdpBridge::TmTcUnixUdpBridge(object_id_t objectId,
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object_id_t ccsdsPacketDistributor, uint16_t serverPort,
uint16_t clientPort):
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TmTcBridge(objectId, ccsdsPacketDistributor) {
mutex = MutexFactory::instance()->createMutex();
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uint16_t setServerPort = DEFAULT_UDP_SERVER_PORT;
if(serverPort != 0xFFFF) {
setServerPort = serverPort;
}
// uint16_t setClientPort = DEFAULT_UDP_CLIENT_PORT;
// if(clientPort != 0xFFFF) {
// setClientPort = clientPort;
// }
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// Set up UDP socket: https://man7.org/linux/man-pages/man7/ip.7.html
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serverSocket = socket(AF_INET, SOCK_DGRAM, 0);
if(socket < 0) {
sif::error << "TmTcUnixUdpBridge::TmTcUnixUdpBridge: Could not open"
" UDP socket!" << std::endl;
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handleSocketError();
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return;
}
serverAddress.sin_family = AF_INET;
// Accept packets from any interface.
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serverAddress.sin_addr.s_addr = htonl(INADDR_ANY);
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serverAddress.sin_port = htons(setServerPort);
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setsockopt(serverSocket, SOL_SOCKET, SO_REUSEADDR, &serverSocketOptions,
sizeof(serverSocketOptions));
serverSocketLen = sizeof(serverAddress);
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int result = bind(serverSocket,
reinterpret_cast<struct sockaddr*>(&serverAddress),
serverSocketLen);
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if(result == -1) {
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sif::error << "TmTcUnixUdpBridge::TmTcUnixUdpBridge: Could not bind "
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"local port " << setServerPort << " to server socket!"
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<< std::endl;
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handleBindError();
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return;
}
}
TmTcUnixUdpBridge::~TmTcUnixUdpBridge() {
}
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ReturnValue_t TmTcUnixUdpBridge::sendTm(const uint8_t *data, size_t dataLen) {
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int flags = 0;
ssize_t result = send(serverSocket, data, dataLen, flags);
if(result < 0) {
// todo: handle errors
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sif::error << "TmTcUnixUdpBridge::sendTm: Send operation failed "
"with error " << strerror(errno) << std::endl;
}
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return HasReturnvaluesIF::RETURN_OK;
}
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void TmTcUnixUdpBridge::checkAndSetClientAddress(sockaddr_in newAddress) {
MutexHelper lock(mutex, 10);
// Set new IP address if it has changed.
if(clientAddress.sin_addr.s_addr != newAddress.sin_addr.s_addr) {
clientAddress.sin_addr.s_addr = newAddress.sin_addr.s_addr;
}
}
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void TmTcUnixUdpBridge::handleSocketError() {
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// See: https://man7.org/linux/man-pages/man2/socket.2.html
switch(errno) {
case(EACCES):
case(EINVAL):
case(EMFILE):
case(ENFILE):
case(EAFNOSUPPORT):
case(ENOBUFS):
case(ENOMEM):
case(EPROTONOSUPPORT):
sif::error << "TmTcUnixBridge::TmTcUnixBridge: Socket creation failed"
<< " with " << strerror(errno) << std::endl;
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break;
default:
sif::error << "TmTcUnixBridge::TmTcUnixBridge: Unknown error"
<< std::endl;
break;
}
}
void TmTcUnixUdpBridge::handleBindError() {
// See: https://man7.org/linux/man-pages/man2/bind.2.html
switch(errno) {
case(EACCES): {
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/*
Ephermeral ports can be shown with following command:
sysctl -A | grep ip_local_port_range
*/
sif::error << "TmTcUnixBridge::TmTcUnixBridge: Port access issue."
"Ports 1-1024 are reserved on UNIX systems and require root "
"rights while ephermeral ports should not be used as well."
<< std::endl;
}
break;
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case(EADDRINUSE):
case(EBADF):
case(EINVAL):
case(ENOTSOCK):
case(EADDRNOTAVAIL):
case(EFAULT):
case(ELOOP):
case(ENAMETOOLONG):
case(ENOENT):
case(ENOMEM):
case(ENOTDIR):
case(EROFS): {
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sif::error << "TmTcUnixBridge::TmTcUnixBridge: Socket creation failed"
<< " with " << strerror(errno) << std::endl;
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break;
}
default:
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sif::error << "TmTcUnixBridge::TmTcUnixBridge: Unknown error"
<< std::endl;
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break;
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}
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}
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