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WiPacket
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MTU stuff

master
Mark Qvist 2014-05-26 13:13:32 +02:00
parent d188663917
commit 62531b89c6
2 changed files with 34 additions and 26 deletions
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4
Makefile
View File

@ -2,5 +2,9 @@ test:
mkdir -p bin
gcc main.c -Wall if_helper.c -o bin/wipacket
debug:
mkdir -p bin
gcc main.c if_helper.c -g -Wall -o bin/wipacket
clean:
rm -r bin

54
main.c
View File

@ -40,7 +40,7 @@ int domainSocket;
#define PROTOCOL_IDENTIFIER 0x9f77
// Max payload length
#define PAYLOAD_LENGTH 1500
#define PAYLOAD_LENGTH 1486
// ESSID and frequency for network
#define ESSID "WiPacket"
@ -157,10 +157,6 @@ int main(int argc, char **argv) {
bool connectionOk = true;
while (connectionOk) {
//////////////////////////////////////////////////
//// Read data from net socket ///////////////////
timeout.tv_sec = 0;
timeout.tv_usec = timeout_msec*1000;
fd_set netSet;
fd_set domainSet;
@ -168,25 +164,6 @@ int main(int argc, char **argv) {
FD_SET(netSocket, &netSet);
FD_ZERO(&domainSet);
FD_SET(connection, &domainSet);
int netSocketReady = select(netSocket+1, &netSet, NULL, NULL, &timeout);
if (netSocketReady < 0) {
if (verbose) printf("Could not query net socket status\n");
}
if (netSocketReady == 1) {
struct sockaddr saddr;
int saddr_size = sizeof(saddr);
nReadLength = recvfrom(netSocket, packetBuffer, PAYLOAD_LENGTH, 0, &saddr, (socklen_t*)&saddr_size);
if (nReadLength > 0) {
if (protocolIdMatch(packetBuffer) && notMine(packetBuffer)) {
if (send(connection, packetBuffer+14, nReadLength-14, 0) < 0) {
if (verbose) printf("Error writing packet to domain socket\n");
connectionOk = false;
}
}
}
}
//////////////////////////////////////////////////
//// Read data from domain socket ////////////////
timeout.tv_sec = 0;
@ -200,6 +177,7 @@ int main(int argc, char **argv) {
if (dReadLength < 0) {
if (!quiet) printf("Error while reading from client\n");
connectionOk = false;
close(connection);
} else {
if (dReadLength > 0) {
transmit(incomingBuffer, dReadLength);
@ -207,6 +185,32 @@ int main(int argc, char **argv) {
if (dReadLength == 0) {
if (verbose) printf("Client disconnect\n");
connectionOk = false;
close(connection);
}
}
}
//////////////////////////////////////////////////
//// Read data from net socket ///////////////////
timeout.tv_sec = 0;
timeout.tv_usec = timeout_msec*1000;
int netSocketReady = select(netSocket+1, &netSet, NULL, NULL, &timeout);
if (netSocketReady < 0) {
if (verbose) printf("Could not query net socket status\n");
}
if (netSocketReady == 1) {
struct sockaddr saddr;
int saddr_size = sizeof(saddr);
nReadLength = recvfrom(netSocket, packetBuffer, PAYLOAD_LENGTH, 0, &saddr, (socklen_t*)&saddr_size);
if (nReadLength > 0) {
printf("Putting into domain socket...\n");
if (protocolIdMatch(packetBuffer) && notMine(packetBuffer)) {
if (send(connection, packetBuffer+14, nReadLength-14, 0) < 0) {
if (verbose) printf("Error writing packet to domain socket\n");
connectionOk = false;
close(connection);
}
}
}
}
@ -358,7 +362,7 @@ void configureInterface() {
if_down(if_name);
if_enable_ibss(if_name);
if_up(if_name);
if_mtu(if_name, PAYLOAD_LENGTH);
if_mtu(if_name, PAYLOAD_LENGTH+14);
if_join_ibss(if_name, essid, frequency);
if_promisc(if_name);
}