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keep one last PairableDevice and one last RequestingClient

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This commit is contained in:
Stephen Birarda 2013-05-13 16:14:17 -07:00
parent 3fdd9c5a39
commit 0f9d72e2c1
1 changed files with 44 additions and 25 deletions
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69
pairing-server/src/main.cpp
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@ -24,6 +24,15 @@ struct PairableDevice {
sockaddr_in localSocket;
};
struct RequestingClient {
char address[INET_ADDRSTRLEN];
int port;
};
UDPSocket serverSocket(PAIRING_SERVER_LISTEN_PORT);
PairableDevice *lastDevice = NULL;
RequestingClient *lastClient = NULL;
int indexOfFirstOccurenceOfCharacter(char* haystack, char needle) {
int currentIndex = 0;
@ -34,70 +43,80 @@ int indexOfFirstOccurenceOfCharacter(char* haystack, char needle) {
return currentIndex;
}
void sendLastClientToLastDevice() {
char pairData[INET_ADDRSTRLEN + 6] = {};
int bytesWritten = sprintf(pairData, "%s:%d", ::lastClient->address, ::lastClient->port);
::serverSocket.send((sockaddr*) &::lastDevice->sendingSocket, pairData, bytesWritten);
}
int main(int argc, const char* argv[]) {
UDPSocket serverSocket(PAIRING_SERVER_LISTEN_PORT);
sockaddr_in senderSocket;
char senderData[MAX_PACKET_SIZE_BYTES] = {};
ssize_t receivedBytes = 0;
std::vector<PairableDevice> devices;
while (true) {
if (serverSocket.receive((sockaddr *)&senderSocket, &senderData, &receivedBytes)) {
if (::serverSocket.receive((sockaddr *)&senderSocket, &senderData, &receivedBytes)) {
if (senderData[0] == 'A') {
// this is a device reporting itself as available
// create a new PairableDevice
PairableDevice newDevice = {};
PairableDevice tempDevice = {};
char deviceAddress[INET_ADDRSTRLEN] = {};
int socketPort = 0;
int numMatches = sscanf(senderData, "Available %s%[^:]:%d %s",
newDevice.identifier,
tempDevice.identifier,
deviceAddress,
&socketPort,
newDevice.name);
tempDevice.name);
if (numMatches >= 3) {
// if we have fewer than 6 matches the packet wasn't properly formatted
// if we have fewer than 3 matches the packet wasn't properly formatted
// otherwise copy the tempDevice to the persisting lastDevice
*::lastDevice = tempDevice;
// setup the localSocket for the pairing device
newDevice.localSocket.sin_family = AF_INET;
inet_pton(AF_INET, deviceAddress, &newDevice);
newDevice.localSocket.sin_port = socketPort;
::lastDevice->localSocket.sin_family = AF_INET;
inet_pton(AF_INET, deviceAddress, &::lastDevice);
::lastDevice->localSocket.sin_port = socketPort;
// store this device's sending socket so we can talk back to it
newDevice.sendingSocket = senderSocket;
::lastDevice->sendingSocket = senderSocket;
// push this new device into the vector
printf("Adding device %s (%s) - %s:%d to list\n",
newDevice.identifier,
newDevice.name,
::lastDevice->identifier,
::lastDevice->name,
deviceAddress,
socketPort);
devices.push_back(newDevice);
if (::lastClient) {
sendLastClientToLastDevice();
}
}
} else if (senderData[0] == 'F') {
// this is a client looking to pair with a device
// send the most recent device this address so it can attempt to pair
char requestorAddress[INET_ADDRSTRLEN] = {};
int requestorPort = 0;
RequestingClient tempClient = {};
int requestorMatches = sscanf(senderData, "Find %[^:]:%d", requestorAddress, &requestorPort);
printf("Find request from interface client at %s:%d\n", requestorAddress, requestorPort);
int requestorMatches = sscanf(senderData, "Find %[^:]:%d",
tempClient.address,
&tempClient.port);
if (requestorMatches == 2) {
PairableDevice lastDevice = devices[devices.size() - 1];
// good data, copy the tempClient to the persisting lastInterfaceClient
*::lastClient = tempClient;
char pairData[INET_ADDRSTRLEN + 6] = {};
sprintf(pairData, "%s:%d", requestorAddress, requestorPort);
printf("Find request from interface client at %s:%d\n",
::lastClient->address,
::lastClient->port);
serverSocket.send((sockaddr*) &lastDevice.sendingSocket, pairData, strlen(pairData));
if (::lastDevice) {
sendLastClientToLastDevice();
}
}
}
}