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check the number of sscanf matches, store sending socket for device to reply

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This commit is contained in:
Stephen Birarda 2013-05-02 16:28:19 -07:00
parent 9050642390
commit e5cd66313a
1 changed files with 29 additions and 21 deletions
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50
pairing-server/src/main.cpp
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@ -18,6 +18,7 @@ const int MAX_PACKET_SIZE_BYTES = 1400;
struct PairableDevice {
char identifier[64];
char name[64];
sockaddr_in sendingSocket;
sockaddr_in localSocket;
};
@ -34,40 +35,47 @@ int indexOfFirstOccurenceOfCharacter(char* haystack, char needle) {
int main(int argc, const char* argv[]) {
UDPSocket serverSocket(PAIRING_SERVER_LISTEN_PORT);
sockaddr deviceAddress;
sockaddr_in deviceAddress;
char deviceData[MAX_PACKET_SIZE_BYTES] = {};
ssize_t receivedBytes = 0;
std::vector<PairableDevice> devices;
while (true) {
if (serverSocket.receive(&deviceAddress, &deviceData, &receivedBytes)) {
if (serverSocket.receive((sockaddr *)&deviceAddress, &deviceData, &receivedBytes)) {
// create a new PairableDevice
PairableDevice newDevice = {};
int addressBytes[4];
int socketPort = 0;
sscanf(deviceData, "A %s %d.%d.%d.%d:%d %s",
newDevice.identifier,
&addressBytes[3],
&addressBytes[2],
&addressBytes[1],
&addressBytes[0],
&socketPort,
newDevice.name);
int numMatches = sscanf(deviceData, "A %s %d.%d.%d.%d:%d %s",
newDevice.identifier,
&addressBytes[3],
&addressBytes[2],
&addressBytes[1],
&addressBytes[0],
&socketPort,
newDevice.name);
// setup the localSocket for the pairing device
newDevice.localSocket.sin_family = AF_INET;
newDevice.localSocket.sin_addr.s_addr = (addressBytes[3] |
addressBytes[2] << 8 |
addressBytes[1] << 16 |
addressBytes[0] << 24);
newDevice.localSocket.sin_port = socketPort;
// push this new device into the vector
printf("Adding device %s (%s) to list\n", newDevice.identifier, newDevice.name);
devices.push_back(newDevice);
if (numMatches >= 6) {
// if we have fewer than 6 matches the packet wasn't properly formatted
// setup the localSocket for the pairing device
newDevice.localSocket.sin_family = AF_INET;
newDevice.localSocket.sin_addr.s_addr = (addressBytes[3] |
addressBytes[2] << 8 |
addressBytes[1] << 16 |
addressBytes[0] << 24);
newDevice.localSocket.sin_port = socketPort;
// store this device's sending socket so we can talk back to it
newDevice.sendingSocket = deviceAddress;
// push this new device into the vector
printf("Adding device %s (%s) to list\n", newDevice.identifier, newDevice.name);
devices.push_back(newDevice);
}
}
}